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WO2025212552A1 - Implant dentaire à profil d'émergence transgingival amélioré - Google Patents

Implant dentaire à profil d'émergence transgingival amélioré

Info

Publication number
WO2025212552A1
WO2025212552A1 PCT/US2025/022411 US2025022411W WO2025212552A1 WO 2025212552 A1 WO2025212552 A1 WO 2025212552A1 US 2025022411 W US2025022411 W US 2025022411W WO 2025212552 A1 WO2025212552 A1 WO 2025212552A1
Authority
WO
WIPO (PCT)
Prior art keywords
base member
dental implant
implant assembly
eccentrically shaped
trans
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
PCT/US2025/022411
Other languages
English (en)
Inventor
Aaron C. BASS
James C. Grant
Bradley W. RENEHAN
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Quadric Biomed LLC
Original Assignee
Quadric Biomed LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US18/625,520 external-priority patent/US12161527B2/en
Application filed by Quadric Biomed LLC filed Critical Quadric Biomed LLC
Publication of WO2025212552A1 publication Critical patent/WO2025212552A1/fr
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0018—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools characterised by the shape
    • A61C8/0019—Blade implants
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/0068—Connecting devices for joining an upper structure with an implant member, e.g. spacers with an additional screw
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/005—Connecting devices for joining an upper structure with an implant member, e.g. spacers
    • A61C8/0069—Connecting devices for joining an upper structure with an implant member, e.g. spacers tapered or conical connection
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C8/00—Means to be fixed to the jaw-bone for consolidating natural teeth or for fixing dental prostheses thereon; Dental implants; Implanting tools
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A61C8/0078—Connecting the upper structure to the implant, e.g. bridging bars with platform switching, i.e. platform between implant and abutment

Definitions

  • FIGURE 9A shows a perspective view- of a base member of the dental implant assembly of FIGURE 5.
  • FIGURE 9B shows a perspective view of an alternate version of the base member of FIGURE 5 with partial ridges as compared to the base member illustrated in FIGURE 5 and FIGURE 9A.
  • FIGURE 11 A shows a front cross-sectional view of the base member of FIGURE 9A.
  • FIG URE. 12 shows a side cross-sectional view 7 of the base member of FIGURE 9A.
  • FIGURE. 13 shows a schematic of various burr cuts that may be made in a patient jawbone in order to receive the dental implant assembly of FIGURE 5.
  • FIGURE 14 shows a perspective view of an abutment member of the dental implant assembly of FIGURE. 5.
  • FIGURE 15 shows a front elevational view of the abutment member of FIGURE 14.
  • FIGURE 16 shows a side cross-sectional view of the abutment member of FIGURE 14.
  • FIGURE. 17 shows a side cross-sectional view of an alternate abutment member, having a tapered lower portion.
  • FIG URE. 18 shows a bottom plan view of the abutment member of FIGURE 14.
  • FIG URE. 19 shows a top plan view of the abutment member of FIGURE 14.
  • FIGURE. 20 shows one embodiment of a fastener that may be used in connection with a dental implant assembly of FIGURE 5.
  • FIGURE 21 shows one embodiment of a removal tool that, may be used to remove the abutment member from the base member.
  • FIGURE 22 A shows a perspective view of an alternate base member having an inward taper at its lower portion.
  • FIGURE 22B shows a front cross-sectional view of the base member of FIGURE 22A.
  • FIGURE 23A shows a perspective view of an alternate base member having an inward taper at its lower portion, having ridges along an entire face of its elongated wall.
  • FIGURE 23B shows a front cross-sectional view of the base member of FIGURE 23 A.
  • FIGURE. 24 shows a perspective view of an alternate base member having an inward pinched portion at its lower portion.
  • FIGURE 25 A shows a perspective view of an alternate base member having different radii of curvatures at its curved ends, with an inward pinched portion at its lower portion.
  • FIGURE 25B shows a perspective view of an alternate base member having different radii of curvatures at its curved ends, with parallel walls in the same axis from the top perimeter to the bottom perimeter.
  • FIGURE 25C shows a top plan view of the base member of FIGURE 25A and similarly of the base member of FIGURE 25B.
  • FIGURE 25D shows a schematic of shows various burr cuts that may be made in a patient jawbone in order to receive the dental implant assembly of FIGURES 25 A-25C.
  • FIGURE 26A shows an exploded front elevational view with assembly instructions for the dental implant assembly of FIGURE 5, according to various embodiments.
  • FIGURE 26B shows a front elevational view of an assembled version of the dental implant assembly of FIGURE 5 and is the same as the front elevational view 7 of FIGURE 6 o with additional labeling to detail aspects of the trans-gingival portion, according to various embodiments.
  • FIGURE 26C shows a front elevational cross-sectional view 7 of the dental implant assembly of FIGURE 6 assembled and implanted in the jaw of a patient, according to various embodiments.
  • FIGURE 27 A depicts a top view showing gaps between adjacent natural dentition and the opening in the jawbone of a patient for a round base member of a conventional implant, according to an embodiment.
  • FIGURE 28C shows a front elevational view of an assembled version of the dental implant assembly of FIGURE 28A with labeling to detail aspects of the trans-gingival emergence profile portion of dental implant assembly, according to various embodiments, according to various embodiments.
  • the lower bone-contacting surface 14 may define angled side walls 16 and a flat base wall 18. It is envisioned that angled side walls 16 may help implantation of the base member 13, but it should be understood that straight or parallel walls are possible and considered within the scope of this disclosure, as described further below.
  • the flat base wall 18 is illustrated as being a solid base without an opening therethrough or extensions or securement members extending further downward therefrom. Alternate base members configured to receive an implant body are also described further below. This particular embodiment of Figures 1 and 2 is designed to be press fit or cemented into place, rather than being secured with a fastener or receiving an implant body.
  • angled side walls 16 may help "wedge" the base member securely in place.
  • the bone-contacting surface 14 may be provided with one or more bone ingrowth/encouraging features, such as ridges, a surface roughness, a bone ingrowth/encouraging chemical or substance, or any combination thereof, all of which can help encourage implantation stability of the base member 13.
  • the base member 13 may be cemented into place.
  • Various types of bone glues or bone cements are possible for use herewith.
  • bone glues being developed that can set quite quickly, which may allow for the possibility of impl anting the dental implants described herein in one sitting, in some instances, (Whereas currently, as described in more detail below, a base member is typically positioned and secured into place; and this secured configuration is then allowed to heal for several months prior to completion of the remainder of the surgery.
  • a base member is typically positioned and secured into place; and this secured configuration is then allowed to heal for several months prior to completion of the remainder of the surgery.
  • fast drying glue or cement is used.
  • This dispenses with the healing cap and tissue former.
  • the presently-described embodiments may be used consistent with this trend.
  • a healing cap and tissue former may be used to allow the base member to heal prior to placement of the remainder of the components.
  • the interior of the base member 13 defines a cavity 20.
  • Cavity 20 is configured to receive an abutment 30, as described further below.
  • Cavity 20 may be provided with internal screw threads 22.
  • Internal screw 7 threads 22 are configured to receive a fastener 50, as also described further below. It is possible, hov/ever, to secure the base member 13 and abutment 30 without the use of internal screw threads or a fastener.
  • the components may directly nest and be glued, cemented, or otherwise adhered to one another.
  • Figure 1 also shows an abutment 30 in position within cavity 20 of base member 13.
  • the abutment 30 is configured with a lower portion 32 that nests within cavity 20.
  • the iower portion 32 may have angled side walls 34 that closely track the angle and configuration of angled side wails 16 of the base member 13.
  • a central channel 36 extends through the abutment 30.
  • the lower surface 38 of the abutment 30 is illustrated as having an opening 40 therethrough.
  • the central channel 36 and the opening 40 are configured to receive an optional fastener 50 for securing the abutment 30 to the base member 13 in use.
  • the central channel 36 may be provided with interior ledges 42 that are configured to support the fastener head 52.
  • a remainder of the abutment body is generally solid material.
  • Fastener 50 is illustrated as having a fastener head 52, a shank 54, and lower threads 56.
  • the fastener head 52 is configured to abut the interior ledges 42 when the fastener is in place, as illustrated by the completed assembly 10 of Figure 1.
  • the lower threads 56 cooperate with the internal screw threads 22 of the base member.
  • Figure 2 illustrates an exploded view of the base member 13, abutment 30, and fastener 50, prior to their assembly and securement to one another.
  • Each of the above-described configurations is designed to be press fit or glued or cemented into a patient's jawhone.
  • Each embodiment illustrates a base member with a thickened base wall.
  • the thickened base wall can accommodate a female thread from a fastener that secures the abutment in place. It should be understood, however, that it maybe possible to press fit or glue or cement the base member and abutment with respect to one another, removing the need to use fastener 50. Accordingly, it is possible to provide a design that does not include internal screw threads 22 or central channel 36 or interior ledges 42. In other words, the base member and the abutment may directly cooperate with one another without use of a fastener or other securement member.
  • the dental implant 100 includes or comprises a fastener 102, an abutment member 104, an endosseous implant body 106, and a base member 108.
  • the base member 108 is fitted to or positioned within an eccentrically-shaped (e.g., oval -like) osteotomy box or cavity formed within jawbone 112, shown in Figure 3 in exaggerated and simplified view.
  • the outer dimensions and shape of the abutment member 104, where it is inserted into the base member 108 may be designed to be closely aligned with the base member dimensions (generally called platform matching), or the outer dimensions of the abutment can be slightly smaller than the base member while generally following the shape of the base member (generally called platform switching).
  • the tissue 11 1 may be folded back to carry out the osteotomy that is to accommodate the base member 108. This may involve drilling of a small pilot hole within the jawbone 112 for carrying out the osteotomy. Then, the base member 108 may be inserted. A pilot hole is further drilled with base member already in place as a guide, for subsequent insertion of the endosseous implant body 106.
  • the endosseous implant body 106 can be positioned through a central passage 114 (formed along an axis) formed within the base member 108 and then is torqued into place to rigidly secure the base member 108 to the jawbone 112.
  • the central passage may be tapered and matches a taper in the head of endosseous implant body 106. In so doing, a friction fit or cold weld is formed between the endosseous implant body 106 and the base member 108 similar to that described in U.S. Pat. Nos. 8,562,244 and 8,740,616, incorporated herein by reference.
  • Figures 22i ⁇ and 22B illustrate alternative options of symmetrical top and bottom perimeters 300, 302 of a base member 204A.
  • the lower portion 340 of the base member 204A illustrates an inward taper 342 at the location of curved side walls.
  • the elongated side walls feature an upper ribbed portion and a lower un-ribbed portion.
  • Figures 23A and 23B illustrate a similar inward taper 342 in alternative base member 204B but show that the elongated side walls may exhibit a ribbed portion along their entire surface. Although not illustrated, it is also possible for the ribbed portion to extend into the inward taper 342 areas.
  • Figure 24 illustrates, with alternate base member 204C, that a complete internal pinch 344 is also an option in some embodiments. In all of these examples, the top perimeter 300 and the lower perimeter 302 all match in size. This allows the dental implant assembly 200 to be positioned into the shaped bone, methods for which are described below.
  • a plurality of drill bits may be used in order to create the appropriately shaped opening 220, which is generally flat on its bottom.
  • the opening to receive the semicircular end walls may be created using circular drill bits or burrs.
  • such circular drill bits may be trephine drills or burrs. The burr selected is sized to match the curvature of the curved end walls 210a, 210b.
  • these circular openings are illustrated as reference numerals 216 in Figure 13.
  • openings 216 are generally drilled so that the opposite ends of the opening are a distance of about D2 from one another (or slightly smaller if the dental implant assembly is to be press fit into place). Because these openings 216 will ultimately be connected, the relevant portion drilled is the outer half circle or semicircle shaped to receive the curved end wall 210. Additionally, in the embodiments in which the elongated side walls 208 are parallel to one another, and the curved end walls 210 have the same radius, the same sized drill bit or burr may be used to prepare the openings 216.
  • FIGS. 25A-25D different sized drill bits or burrs may be used to prepare these openings.
  • a first drill bit size may be used to create opening 330 and a second drill bit size may be used to create opening 332.
  • a straight wall burr may be used to connect the two openings 216 (or 330, 332).
  • the trench or channel created is represented by reference 218 in Figure 13.
  • This channel 218 is generally drilled so that opposite walls are a distance of about DI from one another (or slightly smaller if the dental implant assembly is to be press fit into place).
  • the collective drilling steps create the oblong, eccentric, or otherwise noncircular opening 220 illustrated by Figure 13.
  • This opening 220 is thus sized and shaped in order to receive the base member 204 of Figures 9A-12.
  • the opening 220 has parallel side walls and curved end walls that correspond to elongated side walls 208 and curved end walls 210 of the base number 204.
  • the channel 334 may also be drilled so that the openings are a distance DI from one another.
  • the channel may have outwardly tapering walls, matching the outwardly tapering elongated walls 350 of the base member of Figures 25 A- 25C.
  • the resulting opening created in the patient's bone is sized to receive an appropriate base member 204. Whichever base member 204 is used, it should be understood that the top perimeter 300 and the bottom perimeter 302 are the same shape as the osteotomy created.
  • the base member 204 has an internal cavity 222 which is defined by side walls 208a, 208b, 210a, and 210b.
  • This internal cavity 7 222 is eccentric in shape (the eccentric shape may be oval or another non-circular shape in various embodiments) and is sized to receive the abutment member 205, described further below.
  • the cavity 222 may have corresponding internal parallel walls 310.
  • the cavity 222 may have corresponding internal tapered w'alls 312.
  • a lower portion of the base member 204 may be solid material 224. Extending into solid material 224 is a receiving channel 226. As shown and in specific embodiments, the receiving channel 226 may have internal threads 228 that correspond to and receive threads 272 on the fastener 206 (shown by Figure 20 and also described further below).
  • the base 212 (e.g., the bottom wall) of the base member 204 is illustrated as being a solid base without an opening therethrough or extensions or securement members extending further downward therefrom. Such an embodiment may be designed to be press fit or cemented into place, rather than being secured with a securement member. Alternate base members, however, may be configured with a threaded channel that extends completely through the base that can receive an elongated fastener, which can function as a securement member. These embodiments of base members may thus have a base opening extending through the base 212 for receiving the securement member.
  • the base member 204 is also illustrated as having a plurality of external grooves or ridges 230 along its outer cross-section. It should be understood that various ridge shapes and sizes are possible and considered within the scope of this disclosure.
  • the ridges 230 may be stepped ridges. In other examples, the ridges 230 may define a variety of square or triangular staircase-like configurations, which includes soft or rounded versions of these configurations.
  • the ridges 230 may improve bone integration by providing increased surface area and distribution of stress/load.
  • the ridges 230 may be surface treated. Such surface treatments may be in addition to or instead of the external ridges 230.
  • ridges 230 and/or the external surface of the base member 204 may have a micro blasted or etched surface in order to encourage bone on-growth. These surface treatments may help improve bone integration. This may be accomplished in a number of ways.
  • One example includes additive processes, such as plasma spraying or other types of coating.
  • Another example includes subtractive processes, such as acidwashing or bead blasting.
  • a further surface treatment that is possible includes a layer of polyether ether ketone (PEEK) applied to the external surface area in contact with bone.
  • PEEK polyether ether ketone
  • the ridges or grooves may be applied to the entire outer surface, as shown by Figure HA.
  • the ridges or grooves may only be applied to a portion of the outer surface, as shown by Figure 1 IB,
  • the disclosed dental implant assembly 200 also provides an abutment member 205 that functions in cooperation with the base member 204.
  • Figures 14-19 illustrate various views of an exemplary abutment member 205.
  • the abutment member 205 may nest or otherwise fit within the internal cavity 222 of the base member 204.
  • the abutment member 205 in various embodiments has a lower portion 270 with elongated side walls 242 and curved end walls 244, both of which have outer surfaces that correspond to inner surfaces of the elonga ted side walls and curved end walls 210, respectively, of the base member 204.
  • the lower portion 270 of the abutment member 205 is positioned within the internal cavity 222 of the base member 204.
  • the eccentric shape of internal cavity 222 and of external surface 215 may be referred to as oval in shape, while in others it may be referred to as a stadium or obround in shape as it is essentially a rectangle with semi-circular ends. This positioning may be accomplished by a press fit, friction fit (with very slight internal tapers of one or more of the walls 208, 210, 242, and/or 244) such that the abutment member 205 may be securely positioned into place with respect to the base member 204.
  • the shoulder 246 can rest against tissues of the opening created in the patient's bone.
  • the shoulder 246 may extend past the profile of the elongated side w'alls 208 and may also extend past the profile of curved end walls 210 (e.g., with reference to Figures 6 and 7, in such an embodiment mesial-distal span D3 may be slightly greater (up to, for example 20% greater) than mesial-distal span D2; and with reference to Figure 8, buccal-lingual span D3 may be much greater than buccal-lingual span DI (e.g., between 25% and 150% greater).
  • the general platform switching concept is that the abutment lower portion 270 is "inset" from the outer perimeter of the upper portion 260 (as illustrated by Figure 15), and the abutment member 205 can therefore accommodate a variety of shapes, only one of which shape is shown in the implant drawings.
  • the abutment shoulder chamfer 246 (which may also be referred to as the “abutment shelf’ or “shoulder”) can also vary. Generally, non-angled abutments are shown, but it is understood that angled abutments are considered within the framework of the invention (and are described and shown in the parent applications, incorporated herein by reference).
  • a fastener 206 or retaining screw may also be provided.
  • One exemplary' fastener 206 is illustrated by Figure 20. If provided, this fastener 206 can also vary in size.
  • Internal screw threads 228 within the base member 204 are configured to receive threads 272,
  • a fastener head 276 may be seated with respect to an internal surface of the abutment, as illustrated by Figures 7 and 8. Once the abutment member 205 is placed with respect to the base member 204, the fastener 206 may be torqued into place in order to secure abutment member 205 to the base member 204.
  • the fastener 206 also serves to help prevent any shifting of the abutment member 205 that may otherwise compromise the contacts between the abutment member 205 and base member 204.
  • the fastener 206 prevents concentration of stress forces into small areas. Instead, it assures firm contacts comprising larger force transmission areas and reducing the likelihood of device failure associated with high force concentrations. Additional features of the fastener 206 are shown and described by the parent applications, incorporated herein by reference. (Note that some of the parent applications referred to the fastener as an implant body.)
  • Figure 21 illustrates a removal tool 280 that may be used to remove the abutment member 205 from the base member 204.
  • the receiving tool may have a head 282 that can receive a driver.
  • Threads 284 may be positioned along a shank 286. The threads 284 may engage with the receiving threads 264 of the abutment member 205.
  • a lower bottom surface 288 of the tool 280 is provided with smooth radii 290 to help guide the shank 286.
  • the removal tool 280 engages its threads 284 within the threads 264 of abutment member 205.
  • the bottom of the removal tool is smooth (no threads) and is designed to push against the bottom of the threaded well within the base member 204.
  • the bottom of the removal tool 280 eventually contacts the bottom of the well in the base member 204 and pushes against it. This pops the abutment member 205 up without delivering force into the bone that is holding the base member 204.
  • FIG. 26A shows an exploded front elevational view with assembly instructions for the dental implant assembly 200 of Figure 5, according to various embodiments.
  • the dental implant assembly includes a base member 204, an abutment member 205, and optionally a fastener 206.
  • the base member 204 is adapted for placement into an opening (e.g., a pre-drilled osteotomy) in a jawbone 112.
  • base member 204 comprises elongated vertically parallel side walls (208a, 208b) coupled with opposing curved end w'alls (210a, 210b) which together define an eccentrically shaped external surface 215 and an eccentrically shaped internal cavity 222.
  • An eccentrically shaped curved lip 217 couples top edge perimeters of the external surface 215 and the internal cavity 222 to one another.
  • the top viewed shape (e.g., when viewed from above) of the eccentrically shaped curved lip 217 may be rounded oval, obround, racetrack, or other eccentric rounded but non-circular shape.
  • internal cavity 222 may mirror the shape and/or radius of curvature exhibited by external surface 215.
  • the internal cavity 222 slopes slightly inward as it proceeds downward from eccentrically shaped curved lip 217 toward its floor in which receiving threads 228 are defined.
  • Abutment member 205 which has previously been described, is shown as well.
  • Abutment member 205 is adapted for placement into the internal cavity 222 of the base member 204.
  • Abutment member 205 includes a lower portion 270, a shoulder 246 with a curved perimeter edge 247, an upper portion 260, and a transitional escarpment 250 located on the underside of the shoulder 246.
  • Transitional escarpment 250 couples and smoothly translates the curved perimeter edge 247 of the shoulder 246 to the lower portion 270.
  • lower portion 270 is eccentric and is shaped to correspond to the eccentric shape of the internal cavity 222 of the base member 204, while upper portion 260 is shaped and adapted to receive a dental restoration 2670.
  • transitional escarpment 250 is very pronounced and easily distinguished in Figure 26A, in may be less pronounced in some embodiments (e.g., for implant assemblies designed to replace incisors rather than molars) such that it blends smoothly into lower portion 270, with its main differentiator being that a small portion of it is exposed above a base when the abutment is installed into the base.
  • Dashed assembly line 2602 includes a directional arrow on one end which show's the direction of fitment of abutment member 205 into internal cavity 222 of base member 204.
  • dashed assembly line 2601 includes a directional arrow on one end which shows a direction that fastener 206 (when utilized) is installed into the assembled combination of the base member 204 and the abutment member 205,
  • Dashed assembly line 2603 includes a directional arrow on one end which show's the direction of fitment of a dental restoration 2670 atop of an assembled dental implant assembly 200.
  • a fastener 206 which is adapted for insertion into an internal channel 262 of the abutment member 205, may be optionally included.
  • Base member 204 further comprises internal receiving threads 228 within the internal cavity 222 which are configured to engage with lower threads 272 of the fastener 206.
  • the fastener 206 further comprises a head 276 configured to engage with and seat into the abutment member 205 and to progressively compress the abutment member 205 into the base member 204 in response to progressive engagement of the low'er threads 272 into the receiving threads 228 of the base member 204.
  • Figure 26B show's a front elevational view of the dental implant assembly 200 of Figure 5 and Figure 26A and is the same as the front elevational view' of Figure 6 with the exception of the inclusion of additional labeling to detail aspects of the trans-gingival emergence profile 2640 portion of dental implant assembly 200, according to various embodiments.
  • a trans-gingival emergence profile 2640 is formed between a top edge of the eccentrically shaped curved lip 217 and curved perimeter edge 247 of shoulder 246, and includes an exposed (i.e., visible) region of the lower portion 270 of the abutment member 205 and the transitional escarpment 250 that are between the top of the eccentrically shaped curved lip 217 and curved perimeter edge 247 of shoulder 246.
  • the transitional escarpment 250 has a truncated cone shape (i.e., it is truncated on the bottom by the top edges of lower portion 270 and does not come to a point).
  • the cone shape may be that of a regular cone with some or all sides being straight. In other embodiments some or all of the side portions may be curved, such as with convex (i.e., outwardly bowing) curvatures or concave (i.e., slightly inwardly bowing) curvatures. As depicted, the cone shape has slightly outwardly bowed convex surfaces which reduce or eliminate undercuts/voids which can entrap food as compared to conventional dental implant assemblies.
  • the mesial-distal spans (D3 of the abu tment 205 and D2 of the base 204) may be equal or substantially equal (e.g., within manufacturing and/or assembly tolerances of some small amount) to one another.
  • transitional escarpment 250 and the assembled components of the trans- gingival emergence profile 2640 have only minor rotational symmetry' when rotated horizontally around a vertical axis with respect to Figures 26B. More particularly, there is only rotational symmetry’ with 180 degrees of horizontal rotation. In some embodiments, transitional escarpment 250 and the assembled components of the trans-gingival emergence profile 2640 may exhibit no rotational symmetry' with horizontal rotation about a. vertical axis.
  • Figure 26C shows a front elevational cross-sectional view 7 of the dental implant assembly of Figure 6 assembled and implanted in the jaw 112 of a patient, according to vari ous embodiments.
  • the flat base 212 is in contact with the flat bottom of the opening 220 in the jaw 112 of a patient.
  • the trans-gingival emergence profile 2640 characterizes a shape of the dental implant assembly as it emerges from bone 112 of the jaw, passes through gingiva 111, and transitions to the dental restoration 2670 which may be mounted as a top portion of the dental implant assembly 200.
  • the trans-gingival emergence profile 2640 portion of the dental implant assembly 200 is configured to be disposed between bone-level of the jawbone 112 of a recipient patient and the restoration 2670 (when installed), meaning that the trans- gingival emergence profile 2640 encompasses the region of implant assembly 200 that transitions from the bone 112 through the gingiva 11 1 and meets with curved perimeter edge 247 and an installed restoration 2670 that is seated atop shoulder 246.
  • the gingiva 111 is very thin, but varied patient anatomies may include thicker gingiva extending as a continuous layer from bone level as high, or higher, than the top of the transitional escarpment 250.
  • the trans-gingival emergence profile 2640 portion of the dental implant assembly 200 comprises a sequence of different external surface shapes/eccentric steps (the top edge of eccentrically shaped curved lip 217, an exposed region of lower portion 270, transitional escarpment 250, and curved perimeter edge 247), which translate from one to another across the span of the trans-gingival emergence profile 2640 to present an anatomically correct gap in the trans-gingival region between any adjacent teeth by virtue of an extended mesial-distal dimension (i.e., dimension D2), as illustrated in Figure 13, where dimension D2 differs from and is greater than dimension DI.
  • dimension D2 extended mesial-distal dimension
  • the span of the trans-gingival emergence profile achieves an overall eccentric shape across the span due to the eccentric shape of each of the different external shapes which combine to create the trans-gingival emergence profile 2640.
  • the different dimensions DI and D2 allow the curved end walls 210a and 210b of base member 204 to be placed near adjacent dentition while simultaneously maintaining a narrow DI dimension to preserve bone on the sides of the alveolar ridge, and by extension allowing the trans-gingival emergence profile 2640 to close gaps above the bone level and against adjacent dentition by emerging from the bone with an elongated D2 profile as shown in Figure 13.
  • Figure 25D, Figure 26A, and Figure 26B are examples of the trans-gingival emergence profile
  • the ratio of dimension D2 to DI of a base member 204 as it emerges from jawbone into gingiva may vary’ based on the type of tooth implant (e.g., molar, bicuspid, incisor).
  • dimension D2 of a base member 204 is between 1.1 to 1.25 times dimension DI .
  • dimension D2 of a base member 204 is between 1.25 to 1.5 times dimension DI.
  • dimension D2 of a base member 204 is between 1.5 to 1 ,75 times dimension DI.
  • dimension D2 of a base member 204 is between 1.75 to 2.0 times dimension DI.
  • dimension D2 of a base member 204 is between 2.0 to 2.25 times dimension DI . In some embodiments described herein dimension D2 of a base member 204 is between 2.25 to 2.5 times dimension DI. In some embodiments described herein dimension D2 of a base member 204 is between 2.5 to 2.75 times dimension DI. In some embodiments described herein dimension D2 of a base member 204 is between 2.75 to 3.0 times dimension DI . In some embodiments described herein dimension D2 of a base member 204 is between 3.0 to 3.5 times dimension DI . In some embodiments described herein dimension D2 of a base member 204 is between 3.5 to 4.0 times dimension DI.
  • dimension D2 of a base member 204 is between 4.0 to 4.5 times dimension DI . In some embodiments described herein dimension D2 of a base member 204 is between 4.5 to 5.0 times dimension DI. In some embodiments described herein dimension D2 of a base member 204 is between 5.0 to 5.5 times dimension DI. In some embodiments described herein dimension D2 of a base member 204 is between 5.5 to 6.0 times dimension DI . In some embodiments described herein dimension D2 of a base member 204 is between 6.0 to 6.5 times dimension DI. In some embodiments described herein dimension D2 of a base member 204 is between 6.5 to 7.0 times dimension DI.
  • trans-gingival emergence profiles facilitated by the implants described herein which are extended in the mesial-distal dimension, as compared to their orthogonal buccal-lingual dimension, greatly reduce or eliminate these deficiencies associated with conventional implants.
  • the very small and anatomically correct gap between adjacent dentition facilitated by the trans-gingival emergence profile 2640 mimics, emulates, and very closely resembles the gap between natural teeth and thus reduces or eliminates food entrapment that occurs with conventional implants which do not present an anatomically correct gap but instead provide for a very large gap and/or an undercut that does not naturally exist between teeth.
  • the improved anatomical conformance and anatomically correct gap both of which are facilitated by trans-gingival emergence profile 2640, not only provides a reduction of food trapping but provides for an implanted assembly which can be effectively flossed without difficulties of trapping floss in the trans-gingival region and/or without unflossable areas in the trans-gingival region presented by the much larger gaps and overhangs between teeth which are presented and created by conventional implants.
  • Smaller interproximal gaps 2730B and 2740B still leave sufficient space between an implant assembly 200 installed in opening 220 and adjacent dentition (teeth 2701 and 2702) to allow proper flossing, hygiene, and healthy papilla, while also achieving a gap between an installed base member 204 and a previously installed implant assembly 200 that is within the spectrum of the width of a gap between normal natural teeth and emulates the shape of a natural gap that would exist between normal natural teeth, particularly in the trans- gingival region.
  • implant assembly 200 which emulates the gaps and separation between natural dentition through the trans-gingival region to the top of a restoration installed on implant assembly 200, which correspondingly greatly reduces (and typically eliminates) unflossable undercuts/voids, difficult to floss undercuts, and food traps and the negative issues associated with each.
  • FIG. 28 A shows an upper front perspective view with assembly instructions of a dental implant assembly 2800, according to various embodiments.
  • the dental implant assembly includes a base member 2804, an abutment member 2805, and optionally a fastener 206.
  • the base member 2804 is adapted for placement into an opening in a jawbone.
  • base member 2804 comprises three elongated vertical side walls 2808 (2808a, 2808b, 2808c) coupled by three curved end walls 2810 (2810a, 2810b, 2810c) which together define an eccentrically shaped external surface 2815 and a rounded triangular eccentrically shaped internal cavity 2822.
  • end walls 2810a and 2810b are separated by a maximum distance DI.
  • DI maximum distance
  • the base member 2804 is formed as a seamless, integral component.
  • the rounded triangular shape of the external surface 2815 of base member 2804 prevents it from twisting within the patient's bone cavity upon application of torque by an oral surgeon or other practitioner.
  • portions of rounded triangular eccentrically shaped external surface 2815 may be imbued with concentric external ridges 2830 and/or concentric external grooves 2831 (some portions may be smooth).
  • An eccentrically shaped curved lip 2817 couples top edge perimeters of the external surface 2815 and the internal cavity 2822 to one another.
  • the top viewed shape (e.g., when viewed from above) of the eccentrically shaped curved lip 2817 may be rounded triangular.
  • internal cavity 2822 may mirror the shape and/or radius of curvature exhibited by external surface 2815.
  • the internal cavity 2822 slopes slightly inward as it proceeds downward from eccentrically shaped curved lip 2817 toward its floor in which receiving threads 2828 are defined.
  • Abutment member 2805 which has previously been described, is shown as well.
  • Abutment member 2805 includes a lower portion 2870 (visible in Figure 28B), a shoulder 2846 with a curved perimeter edge 2847, an upper portion 2860, and a transitional escarpment 2850 (visible in Figure 28B) located on the underside of the shoulder 2846.
  • Transitional escarpment 2850 couples and smoothly translates the curved perimeter edge 2847 of the shoulder 2846 to the lower portion 2870.
  • Lower portion 2870 has a rounded triangular eccentric shape and is shaped to correspond to the rounded triangular eccentric shape of the internal cavity 2822 of the base member 2804, while upper portion 2860 is shaped and adapted to receive a dental restoration 2670.
  • abutment member 2805 is adapted for placement, in a nested fashion, into the internal cavity 2822 of the base member 2804 and thus its lower portion 2870 is similarly shaped to internal cavity 2822 to facilitate this nesting.
  • the maximum measurement of the mesial-distal span of abutment member 2805 may be slightly larger (e.g., up to 40% larger) than the maximum measurement of the medial-distal span (D2/D3) of the base member 2804; while in other non-depicted embodiments, these mesial-distal spans may be equal or substantially equal (e.g., within manufacturing and/or assembly tolerances of some small amount) to one another; and while in yet other not-depicted embodiments, the mesial-distal span of abutment member 2805 may be slightly smaller (e.g., up to 15% smaller) than the maximum measurement of the medial-distal span (D2/D3 ) of the base member 2804.
  • the span of the trans-gingival emergence profile achieves an overall eccentric shape across the span due to the eccentric shape of each of the different external shapes which combine to create the trans-gingival emergence profile 2840.
  • the different dimensions DI and D2 allow 7 the rounded ends 2810 (2810a, 2810b, and 2810c) of base member 2804 to be placed near adjacent dentition while simultaneously maintaining a narrow DI dimension to preserve bone on the sides of the alveolar ridge, and by extension allowing the trans-gingival emergence profile 2840 to close gaps above the bone level and against adjacent dentition by emerging from the bone with an elongated D2 profile as shown in Figure 28A, Figure 28B, and Figure 28C.
  • the improved anatomical conformance and anatomically correct gap not only provides a reduction of food trapping but provides for an implanted assembly which can be effectively flossed without difficulties of trapping floss in the trans-gingival region and/or without unflossable areas in the trans-gingival region presented by the much larger gaps and overhangs between teeth which are presented and created by conventional implants.
  • base member 2804 may be manufactured to include one or more of the inward/internal taper 342 or inward/internal pinch 344 features demonstrated in the alternative bases shown in Figures 22A, 22B, 23 A, 23B, and/or 24,
  • Channel 2934 may also be drilled/cut so that the most outer edges of openings 2997 and 2999 are a distance D2 from one another; the outer edges of openings 2998 and 2999 are a distance DI from one another; and the outer edges of openings 2998 and 2997 are a distance D3 from one another.
  • the channel 2934 may have walls which taper outward from bottom to top in some embodiments. In some such embodiments, such outwardly tapering walls match outwardly tapering elongated walls which may be implanted in various embodiments of base member 2804 of Figures 28A-28F.
  • Figure 30 depicts side-by-side bitewing type x-rays 3001 and 3002 which illustrate a front side view comparison of interproximal gaps between adjacent natural dentition, interproximal gaps between adjacent natural dentition and a conventional implant, and interproximal gaps between adjacent elongated implant assemblies described herein (e.g., 200, 2800) and adjacent natural dentition, according to various embodiments.
  • x-ray 3001 three natural teeth 3010, 3011 and 3012 are illustrated along with a conventional implant assembly 3015 which utilizes a round base member.
  • Conventional implant assembly 3015 is disposed between natural teeth 3010 and 3011; while natural teeth 3011 and 3012 are adjacent to one another.
  • a natural interproximal gap 3032 is illustrated between adjacent teeth 3011 and 3012.
  • Between conventional implant assembly 3015 and adjacent tooth 3010 is a large, unnatural interproximal gap 3030 which includes a large food trapping undercut 3040 in the trans-gingival region.
  • a large, unnatural interproximal gap 3031 which includes a large food trapping undercut 3041 in the trans- gingival region.
  • these large and unnatural interproximal gaps 3030, 3031 between conventional implant assembly 3015 and adjacent natural dentition 3010 and 3011 are two to three times larger than the natural interproximal gap 3032 between tooth 301 1 and tooth 3012. Further, the conventional implant assembly 3015 exhibits undercuts 3040, 3041 which are not present beneath natural dentition.
  • x-ray 3002 two natural teeth 3013 and 3014 are illustrated along with an implant assembly 200 (or 2800) of the type described herein which uses a base member like base member 204 (or base member 2804) that has been elongated in the mesial -distal dimension in the manner previously described.
  • the implant assembly 200, 2800 is disposed between natural teeth 3013 and 3014.
  • a small interproximal gap 3033 is illustrated between implant assembly 200, 2800 and adjacent tooth 3013 and it emulates the size and shape of natural interproximal gap 3032 that is illustrated in x-ray 3001.
  • a small interproximal gap 3034 is illustrated between implant assembly 200, 2800 and adjacent tooth 3014 and it also emulates the size and shape of natural interproximal gap 3032 in the interproximal region that is illustrated in x-ray 3001.
  • the trans-gingival emergence profile regions see, e.g., 2640 of Figure 26C; 2840 of Figure 28F) between implant assembly 200, 2800 and adjacent dentition 3013, 3014 emulate that of natural interproximal gap 3032.
  • the emergence profile regions emulate natural dentition by exhibiting no undercut, like undercut 3041, in the trans-gingival region which would trap food or/or be more difficult to floss than the interproximal gap 3032 in the trans-gingival region between natural teeth 301 1 and 3012.
  • the trans-gingival emergence profile e.g., 2640, 2840
  • implant assembly 200, 2800, or the like creates an interproximal gap between adjacent dentition that emulates the size and shape of a natural interproximal gap between adjacent, natural teeth, and it does so without an undercut void between the abutment member and base of the implant assembly. This is the case whether the implant assembly (200, 2800, or the like) is implanted adjacent, to a natural tooth or adjacent to a like implant assembly (e.g., 200, 2800, or the like).
  • the abutment member includes a lower portion, a shoulder with a curved perimeter edge, an upper portion, and a transitional escarpment.
  • the transitional escarpment couples and smoothly translates the curved perimeter edge of the shoulder to the lower portion.
  • the lower portion is shaped to correspond to the eccentric shape of the eccentrically shaped internal cavity of the base member, and the upper portion is adapted to receive a dental restoration.
  • a trans-gingival emergence profile is formed between a top edge of the eccentrically shaped curved lip and an exposed region of the lower portion and the transitional escarpment that are between the eccentrically shaped curved lip and the curved perimeter edge of the shoulder.
  • the trans-gingival emergence profile characterizes a shape of the dental implant assembly as it emerges from bone, passes through gingiva, and transitions to the dental restoration mounted as a top portion of the dental implant assembly.
  • the base member further comprises a flat base coupled with the eccentrically shaped external surface.
  • the flat base is a solid bottom to the base member without an opening therethrough or extensions or securement members extending further downward therefrom.
  • the dental implant assembly further comprises a fastener adapted for insertion into an internal channel of the abutment member, wherein the base member further comprises internal receiving threads within the eccentrically shaped internal cavity, and wherein the fastener comprises a set of lower threads configured to engage the internal receiving threads of the base member.
  • the fastener may further comprise a head configured to engage the abutment member and progressively compress the abutment member into the base member in response to progressive engagement of the lower threads into the internal receiving threads of the base member.
  • the mesial- distal span of the curved perimeter edge of the shoulder is equal to the outermost mesial distal span of the base while the buccal -lingual span of the curved perimeter edge of the shoulder is greater than the buccal-lingual span of the base member.
  • the shoulder may extend past the profile of the elongated vertically parallel side walls but may not extend past the profile of the opposing curved end w ? alls.
  • the mesial- distal span of the curved perimeter edge of the shoulder is substantially equal to the outermost mesial distal span of the base while the buccal -lingual span of the curved perimeter edge of the shoulder is greater than the buccal-lingual span of the base member.
  • the shoulder may extend past the profile of the elongated vertically parallel side walls but may not extend past the profile of the opposing curved end walls.
  • the trans- gingival emergence profile portion of the dental implant assembly is configured to be disposed between bone-level of the jawbone of a recipient patient and the dental restoration.
  • the trans- gingival emergence profile portion of the dental implant assembly comprises a sequence of eccentric steps which translate from one to another across a span of the trans-gingival emergence profile to achieve an overall eccentric shape across the span.
  • the curved perimeter edge is obround in shape when viewed from above.
  • the transitional escarpment has a truncated cone shape.
  • the eccentric shape of the eccentrically shaped internal cavity is oval.
  • the dental implant assembly comprises a base member and an abutment member.
  • the base member is adapted for placement into an opening in a jawbone, wherein the base member comprises elongated side walls coupled with curved opposing end walls which together define an eccentrically shaped external surface and an eccentrically shaped internal cavity, and an eccentrically shaped curved lip which couples top edge perimeters of the eccentrically shaped external surface and the eccentrically shaped internal cavity to one another.
  • the abutment member is adapted for placement into the eccentrically shaped internal cavity of the base member.
  • the mesial-distal span of the curved perimeter edge of the shoulder is equal to the outermost mesial distal span of the base while the buccal-lingual span of the curved perimeter edge of the shoulder is greater than the buccal-lingual span of the base member.
  • the shoulder may extend past the profile of the elongated side walls but may not extend past the profile of the curved opposing end walls.
  • the abutment member includes a lower portion, a shoulder with a curved perimeter edge which defines the eccentric or obround shape when viewed from above, an upper portion, and a transitional escarpment which couples and smoothly translates the curved perimeter edge of the shoulder to the lower portion.
  • the lower portion is shaped to correspond to the eccentric shape of the eccentrically shaped internal cavity of the base member, and the upper portion is adapted to receive a dental restoration.
  • a trans-gingival emergence profile is formed between a top edge of the eccentrically shaped curved lip and a region of the lower portion between the eccentrically shaped curved lip and the shoulder.
  • the trans-gingival emergence profile characterizes a shape of the dental implant assembly as it emerges from bone, passes through gingiva, and transitions to the dental restoration mounted as a top portion of the dental implant assembly.
  • the dental implant assembly further comprises a fastener adapted for insertion into an internal channel of the abutment member, wherein the base member further comprises internal receiving threads within the eccentrically shaped internal cavity, and wherein the fastener comprises a set of lower threads configured to engage the internal receiving threads of the base member.
  • the fastener may further comprise a head configured to engage the abutment member and progressively compress the abutment member into the base member in response to progressive engagement of the lower threads into the internal receiving threads of the base member.
  • the trans- gingival emergence profile portion of the dental implant assembly comprises a sequence of eccentric steps which translate from one to another across a span of the trans-gingival emergence profile to achieve an overall eccentric shape across the span.
  • a dental implant assembly whereby an eccentrically-shaped osteotomy cavity is formed in jawbone and then an eccentrically-shaped base member of the implant is positioned into the cavity.
  • the base member selves as a platform to secure an eccentrically-shaped abutment member of the implant that in turn receives a dental restoration, such as a crown or denture.
  • such an implementation may make it easy for a physician to slip the abutment member into the base member with a correct or proper orientation, and also prevent the abutment member from rotating with respect to the base member due to the complementary oblong or oval geometry of these pieces.
  • various features of the pieces or parts of the dental implant may be surface treated in order to improve bone integration and in general fit together with precision.
  • a one-piece press fit implant having the outer eccentric shapes described herein, may be useful.
  • a one-piece press fit implant may be used for both anterior and posterior teeth. Various sizes are possible and considered within the scope of this disclosure.
  • the implants disclosed herein may be manufactured using any appropriate methods. In certain examples, powdered metal sintering using 3-D Selective Laser Sintering or SLS printing as possible. The implants disclosed herein may be made of any appropriate biocompatible materials.
  • a dental implant system or assembly and a method for implanting the same are contemplated and claimed and, although the subject matter has been described in language specific to structural features and/or methodological acts, it is to be understood that the subject matter defined in the appended claims is not necessarily limited to the specific features or acts described above. Rather, the specific features and acts described above are disclosed as example forms of implementing the claims. Additionally, the methods, systems or assemblies as discussed above are examples. Various configurations may omit, substitute, or add various method steps or procedures, or components as appropriate. For instance, in alternative examples, the methods may be performed in an order different from that described, and/or various stages may be added, omitted, and/or combined.

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  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial Surgery (AREA)
  • Orthopedic Medicine & Surgery (AREA)
  • Dentistry (AREA)
  • Epidemiology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Animal Behavior & Ethology (AREA)
  • General Health & Medical Sciences (AREA)
  • Public Health (AREA)
  • Veterinary Medicine (AREA)
  • Dental Prosthetics (AREA)

Abstract

Un ensemble implant dentaire comprend un élément de base et un élément pilier. L'élément de base est conçu pour être placé dans une ouverture d'une mâchoire et comprend des parois latérales allongées verticalement parallèles, reliées à des parois d'extrémité opposées incurvées qui définissent ensemble une surface externe de forme excentrique et une cavité interne de forme excentrique. L'élément de base comprend également une lèvre incurvée de forme excentrique qui relie les périmètres du bord supérieur de la surface externe et de la cavité interne entre eux. L'élément pilier est conçu pour être placé dans la cavité interne de forme excentrique de l'élément de base. Du fait du placement de l'élément pilier dans la cavité interne de forme excentrique de l'élément de base, un profil d'émergence transgingival est formé entre la lèvre incurvée de forme excentrique et une région de la partie inférieure entre la lèvre incurvée de forme excentrique et l'épaulement.
PCT/US2025/022411 2024-04-03 2025-04-01 Implant dentaire à profil d'émergence transgingival amélioré Pending WO2025212552A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
US18/625,520 2024-04-03
US18/625,520 US12161527B2 (en) 2014-03-07 2024-04-03 Dental implant with improved trans-gingival emergence profile
US18/969,416 2024-12-05
US18/969,402 2024-12-05
US18/969,416 US20250090281A1 (en) 2014-03-07 2024-12-05 Dental implant assembly with base member having eccentrically shaped external surface
US18/969,402 US20250090280A1 (en) 2014-03-07 2024-12-05 Dental implant assembly with base member having obround shaped external surface

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WO2025212552A1 true WO2025212552A1 (fr) 2025-10-09

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8740616B2 (en) * 2008-03-04 2014-06-03 Grant Dental Technology Angled dental platform assembly and methods
US10016256B2 (en) * 2014-03-07 2018-07-10 Earl Wayne Simmons, Jr. Methods and apparatus for preparing a dental implant site
US10905529B2 (en) * 2011-06-13 2021-02-02 Imad Haydar Oval section dental implant
US20220233280A1 (en) * 2019-05-24 2022-07-28 Grant Dental Technology Corporation Dental implant system

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8740616B2 (en) * 2008-03-04 2014-06-03 Grant Dental Technology Angled dental platform assembly and methods
US10905529B2 (en) * 2011-06-13 2021-02-02 Imad Haydar Oval section dental implant
US10016256B2 (en) * 2014-03-07 2018-07-10 Earl Wayne Simmons, Jr. Methods and apparatus for preparing a dental implant site
US20220233280A1 (en) * 2019-05-24 2022-07-28 Grant Dental Technology Corporation Dental implant system

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