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WO2020078947A1 - Système prothétique dentaire de type implant pour fixation temporaire - Google Patents

Système prothétique dentaire de type implant pour fixation temporaire Download PDF

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Publication number
WO2020078947A1
WO2020078947A1 PCT/EP2019/077863 EP2019077863W WO2020078947A1 WO 2020078947 A1 WO2020078947 A1 WO 2020078947A1 EP 2019077863 W EP2019077863 W EP 2019077863W WO 2020078947 A1 WO2020078947 A1 WO 2020078947A1
Authority
WO
WIPO (PCT)
Prior art keywords
section
abutment
crown
cylindrical
tubular stem
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.)
Ceased
Application number
PCT/EP2019/077863
Other languages
English (en)
Inventor
Andrea MORBIDONI
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.)
Morbidoni Luca
Original Assignee
Morbidoni Luca
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
Application filed by Morbidoni Luca filed Critical Morbidoni Luca
Publication of WO2020078947A1 publication Critical patent/WO2020078947A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • A61C8/0048—Connecting the upper structure to the implant, e.g. bridging bars
    • A—HUMAN NECESSITIES
    • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
    • A61C—DENTISTRY; APPARATUS OR METHODS FOR ORAL OR DENTAL HYGIENE
    • A61C13/00—Dental prostheses; Making same
    • A61C13/0001—In-situ dentures; Trial or temporary dentures

Definitions

  • the present patent application for industrial invention relates to a dental prosthetic system of implant type for temporary fixing.
  • dental implants are medical devices of surgical type that are used to functionally and aesthetically remedy the loss or the 5 congenital lack of one or more teeth.
  • the dental implants of known type comprise three parts:
  • an intraosseous screw (technically defined as "implant") with a blind axial hole, comprising a first substantially conical section that is obtained in the head of said screw and is provided with smooth walls, is and a second section, which is joined to the first section and is provided with a cylindrical profile and threaded internal walls;
  • a metal abutment comprising a cylindrical tubular stem and a tapered appendage suitable for being exactly inserted in the first section of the axial hole of the intraosseous screw;
  • a prosthetic crown that consists in an artificial reproduction of the patient's missing tooth and comprises a cylindrical hole suitable for exactly housing the cylindrical tubular stem of the abutment.
  • the crown comprises an occlusal portion suitable for being directed towards an opposite antagonist crown, and a tapered portion in
  • the tapered appendage of the abutment is inserted in the first 5 conical section of the axial hole of the intraosseous screw in such a way that the tapered appendage of the abutment can be firmly stopped inside said first section of the axial hole of the intraosseous screw by means of a fixing screw.
  • a fixing screw crosses the cylindrical tubular stem of the abutment until it projects from the abutment, in such 10 a way to be helically engaged in the internal thread of the second section of the axial hole of the intraosseous screw.
  • the prosthetic crown is fixed to the abutment by inserting the cylindrical tubular stem of the abutment inside the cylindrical hole of the prosthetic crown, and then the crown is permanently fixed to the is abutment with the application of a suitable cement.
  • the cylindrical tubular stem of the abutment comprises an external surface provided with a set of annular grooves suitable for being filled with the cement used for fixing the abutment and the crown, in such a way to guarantee a better hold of the cement on 20 said external surface of the stump.
  • the prosthetic crown is fixed to the abutment in a dental workshop, and not within the patient's oral cavity.
  • the crown and the abutment can be accurately cemented; moreover, any excessive amount of cement between crown 25 and abutment can be eliminated.
  • the crown must be centrally provided with a through hole obtained in the occlusal portion of the crown and suitable for being crossed by the fixing 30 screw in order to fix the crown-abutment assembly to the intraosseous screw inserted in the patient's bone.
  • the fixing screw must be inserted in the through hole obtained in the occlusal portion of the crown, crossing the cylindrical tubular stem of the abutment, which is joined with the crown, until it is helically engaged in the internal thread 5 of the second section of the axial hole of the intraosseous screw inserted in the patient's bone.
  • the through hole obtained in the occlusal portion of the crown must be filled by the dentist in order to restore the perfectly continuous homogeneous surface of the occlusal portion of the crown.
  • the prosthesis must undergo a high-temperature thermal treatment to degrade the cement and separate the crown from the abutment.
  • 25 SE1651713 discloses a method for making a dental prosthesis that comprises a crown with the shape and aspect of a natural tooth, an implant and an intermediate structure used to join the implant and the crown. Such a method provides for an intermediate structure that is made of two separate cooperating portions, one of them being joined to 30 the crown.
  • This document discloses a bayonet coupling between the implant and the crown, wherein the crown first undergoes a pure translation and then a pure rotation.
  • US2008/274440 discloses an abutment for a dental prosthesis used for fixing a crown to an implant.
  • Such an abutment is made in one 5 piece from multicolor ceramic material, in such a way to adjust to the color of the crown, to the color of the surrounding teeth and to the color of the gingival tissue.
  • the purpose of the present invention is to disclose a prosthetic system wherein the crown and the abutment can be firmly joined before 10 they are permanently cemented.
  • the abutment and the crown comprise means for mutual coupling that are suitable for preventing the is accidental detachment of the crown from the abutment, as well as for preventing an uncontrolled rotation of the crown relative to the abutment.
  • said coupling means provide for a bayonet coupling between the crown and the abutment, and are disposed on the 20 cylindrical tubular stem of the abutment and on the cylindrical hole of the crown that is suitable for exactly housing said cylindrical tubular stem of the abutment.
  • the dentist can try the prosthesis in the 25 patient's oral cavity and perform all the necessary functional and aesthetic tests for the best operation of the prosthesis before permanently cementing the crown and the abutment.
  • Fig. 1 is an axonometric exploded view of the two main parts of the new prosthetic system of the invention
  • FIG. 1 - FIG. 2 and 3 are enlarged views of said two main parts of Fig. 1, respectively;
  • Fig. 4 illustrates the "abutment-crown" assembly at the end of their mutual fixing, in a sectional view with a vertical plane that corresponds to plane A-A of Fig. 2;
  • - Fig. 5 is the same as Fig. 4, except for the fact that it illustrates said "abutment-crown" assembly in a sectional view with a vertical plane is that corresponds to plane B-B of Fig. 2.
  • the prosthetic system of the invention comprises an implant (not shown in the appended figures) suitable for being inserted into a bone of a patient, a crown (2) and a metal abutment (1) for fixing the crown (2) to the implant.
  • the implant 20 comprises an axial hole formed of a first section, which is preferably a conical section, and a second cylindrical section with threaded walls.
  • the metal abutment (1) comprises a cylindrical tubular stem (10) and an axial hole (11) that crosses the metal abutment (1) for its entire length.
  • Said metal abutment (1) comprises a tapered appendage (13) in 25 coaxial position to the cylindrical tubular stem (10), and a circular flange (12) that protrudes radially from the cylindrical tubular stem, in such a way to be disposed between the cylindrical tubular stem (10) and the tapered appendage (13).
  • the tapered appendage (13) is conical and suitable for being disposed in the first section of the axial 30 hole of the implant.
  • (1) comprises a first section (11a) that develops inside the cylindrical tubular stem (10), and a second section (lib) with lower section than the first section (11a) that develops inside the tapered appendage (13), starting from an intermediate step (11c) provided at the height of the circular flange (12).
  • the crown (2) comprises an occlusal portion suitable for facing an opposite antagonist crown, and a tapered portion that is disposed in opposite position to said occlusal portion and is defined by a flat circular edge (21).
  • a crown (2) has a cylindrical hole (20) with vertical axis, provided with one end (El) (shown in Fig. 4) in correspondence of said occlusal portion of the crown (2), and a second end (E2) (shown in Fig. 3) in correspondence of said tapered portion of the crown (2).
  • Such a cylindrical hole (20) of the crown (2) is suitable for exactly housing the cylindrical tubular stem (10) of the metal abutment (1) and the flat circular edge (21) of the tapered portion of the crown (2) is suitable for exactly engaging against the circular flange (12) of the abutment (1).
  • said cylindrical hole (20) comprises a first section (20a), a second section (20c) and an intermediate step (20c) that joins the first section (20a) with the second section (20c).
  • the first section (20a) has a lower section than the second section (20c).
  • the second section (20c) of the cylindrical hole (20) is suitable for exactly housing the cylindrical tubular stem (10) of the abutment (1) until said cylindrical tubular stem (10) is engaged against the intermediate step (20b).
  • the implant, the abutment (1) and the crown (2) can be assembled traditionally, in such a way that the crown
  • said screw (V) comprises a threaded stem (VI) with the same diameter as the second section (l ib) of the axial hole (11) of the abutment (1), and a cylindrical head (V2) with the same diameter as the first section (11a) of the axial hole (11) of the 5 abutment (1), i.e. the same diameter as the first section (20a) of the cylindrical hole (20) of the crown (2).
  • the screw (V) is configured in such a way to be inserted into the cylindrical hole (20) of the crown (2) through the first end (El) of the cylindrical hole (20) of the crown (2), in lo such a way that the threaded stem (VI) of the screw (V) crosses the cylindrical hole (20) of the crown until it is inserted in the second section (lib) of the axial hole (11) of the abutment (1), in such a way to protrude outwardly from the abutment (1) and to be tightened in the threaded hole of the implant that is already inserted in the bone.
  • the stop position for the insertion of the screw (V) is represented by the intermediate step (11c) provided inside the axial hole (11) of the abutment (1), against which the cylindrical head (V2) of said screw (V) is engaged.
  • the cylindrical hole (20) of the crown (2) and the cylindrical 20 tubular stem (10) of the abutment (1) comprise coupling means (3, 4), suitable for providing a bayonet coupling between said abutment (1) and said crown (2) before they are permanently cemented.
  • said coupling means (3, 4) comprise a pair of opposite grooved tracks (3) with constant width that 25 are obtained in the cylindrical tubular stem (10) of the abutment (1), and a pair of hemispherical projections (4) in diametrically opposite position, which are disposed in an internal surface of the cylindrical hole (20) of the crown, in the proximity of the flat circular edge (21) of the crown (2).
  • Each grooved track (3) has a substantially L-shaped profile and 30 comprises a first vertical section (3a) with substantially helical profile that extends for the entire length of the cylindrical tubular stem (10), and a second section (3b) joined with said first section (3a) that extends in horizontal direction until a vertical ending edge (30), for a section of the circumference of the cylindrical tubular stem (10) immediately behind the 5 circular flange (12) of the abutment (1).
  • the height of the second section (3b) of each grooved track (3) corresponds to the width of the first section (3a).
  • the first section (3a) of each grooved track (3) comprises a first vertical section (3a ) that occupies an ending section of lo the cylindrical tubular stem (10) of the abutment (1) and is defined by a first longitudinal edge (31) on one side, and a second vertical section (3a") that ends in correspondence of the circular flange (12) of the abutment (1) and is joined with the second section (3b) of the grooved track (3) that extends towards the first vertical section (3a') ⁇
  • Said intermediate oblique section (3a') is provided with such an inclination that the second vertical section (3a") is off-centered relative to the first vertical section (3a ), lying on the opposite side with respect to the side where the first longitudinal edge 20 (31) of the first vertical section (3a 7 ) lies.
  • the hemispherical projections (4) provided in the crown are configured in such a way to be exactly inserted in the grooved tracks (3) of the cylindrical tubular stem (10) of the abutment (1), in such a way to move along the first section (3a) and the second section (3b) of each 25 grooved track (3), respectively, following to a roto-translation and a rotation of the crown (2).
  • the hemispherical projections (4) of the crown are sequentially moved along the first vertical section (3a 7 ), the intermediate oblique section (3a"") and the second vertical section (3a") of the first section of the grooved tracks (3) until it is engaged against the circular flange (12) of the abutment (1).
  • the crown (2) undergoes a first rotation around its vertical axis, so that the hemispherical projections (4) of the crown are exactly engaged in the second vertical sections (3a") of the first sections (3a) of the grooved tracks (3).
  • the crown (2) undergoes a roto-translation lo because of the cooperation between the two hemispherical projections (4) of the crown (2) and the vertical sections (3a) of the grooved tracks (3) of the abutment (1).
  • the crown (2) undergoes a second rotation around its vertical axis, in opposite direction relative to the first rotation, in such is a way that the hemispherical projections (4) of the crown (2) are moved along the second sections (3b) of the grooved tracks (3) for the entire length, until they are stopped against the vertical ending edges (30) of said second sections.
  • the crown (2) returns to its initial position, i.e. the position imposed by the dentist when the 20 hemispherical projections (4) of the crown are inserted in the first sections (3a) of the grooved tracks of the abutment.
  • the crown (2) is no longer in a position to be detached and rotate in an uncontrolled way relative to the 30 abutment (1).
  • the abutment (1) comprises two hemispherical cavities (12a) in diametrically opposite position, which are obtained on a surface of the circular flange (12) and 5 are suitable for exactly receiving two hemispherical pegs (21a) provided in diametrically opposite position in the flat circular edge (21) of the crown, as shown in Figs. 2 and 3.
  • the coupling between the abutment (1) and the crown (2) is extremely stable and the abutment-crown assembly can lo be installed in the oral cavity of the patient in order to confirm that its position is correct.
  • the abutment-crown assembly can be extracted from the oral cavity of the patient, in such a way that the crown (2) can be detached from the abutment (1).
  • the operator can cement the is crown (2) and the abutment (1) in such a way that they are permanently coupled in bayonet coupling mode.
  • cylindrical tubular stem (10) of the abutment (1) advantageously comprises a set of annular grooves (G) (shown in Fig. 2) suitable for creating corresponding undercuts on the 20 smooth surface of said cylindrical tubular stem (10), said undercuts being suitable for favoring the grip of the cement applied between the abutment (1) and the crown (2).

Landscapes

  • Health & Medical Sciences (AREA)
  • Oral & Maxillofacial 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)
  • Orthopedic Medicine & Surgery (AREA)
  • Dental Prosthetics (AREA)
  • Prostheses (AREA)

Abstract

Un système prothétique dentaire de type implant comprend un implant, une butée métallique (1), comprenant une tige tubulaire cylindrique (10), et une couronne (2) pourvue d'un trou cylindrique (20) avec un axe vertical approprié pour recevoir la tige tubulaire cylindrique (10) de la butée (1); ladite butée métallique (1) et ladite couronne (2) comprenant des moyens de couplage (3, 4) appropriés pour assurer un couplage à baïonnette entre ladite butée (1) et ladite couronne (2).
PCT/EP2019/077863 2018-10-15 2019-10-15 Système prothétique dentaire de type implant pour fixation temporaire Ceased WO2020078947A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
IT102018000009446A IT201800009446A1 (it) 2018-10-15 2018-10-15 Sistema protesico dentale, di tipo implantare, a fissaggio temporaneo.
IT102018000009446 2018-10-15

Publications (1)

Publication Number Publication Date
WO2020078947A1 true WO2020078947A1 (fr) 2020-04-23

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Application Number Title Priority Date Filing Date
PCT/EP2019/077863 Ceased WO2020078947A1 (fr) 2018-10-15 2019-10-15 Système prothétique dentaire de type implant pour fixation temporaire

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IT (1) IT201800009446A1 (fr)
WO (1) WO2020078947A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022086048A1 (fr) * 2020-10-20 2022-04-28 주식회사 덴플렉스 Point d'appui d'implant dentaire présentant une fonction tampon de force occlusale

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0687450A1 (fr) * 1994-06-17 1995-12-20 Regent Limited Implant dentaire
US20080274440A1 (en) 2004-03-12 2008-11-06 Ivoclar Vivadent Ag Dental Implant Abutment
US20170202649A1 (en) * 2014-07-25 2017-07-20 Nobel Biocare Services Ag Provisional prosthetic systems and methods of using same
SE1651713A1 (en) 2016-12-21 2018-06-22 3D Tech Sweden Ab Dental superstructure and method for producing a dental superstructure

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5733122A (en) * 1995-05-31 1998-03-31 Gordon; Basil Dental implant attachment assembly including device and method for resisting loosening of attachment

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0687450A1 (fr) * 1994-06-17 1995-12-20 Regent Limited Implant dentaire
US20080274440A1 (en) 2004-03-12 2008-11-06 Ivoclar Vivadent Ag Dental Implant Abutment
US20170202649A1 (en) * 2014-07-25 2017-07-20 Nobel Biocare Services Ag Provisional prosthetic systems and methods of using same
SE1651713A1 (en) 2016-12-21 2018-06-22 3D Tech Sweden Ab Dental superstructure and method for producing a dental superstructure

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022086048A1 (fr) * 2020-10-20 2022-04-28 주식회사 덴플렉스 Point d'appui d'implant dentaire présentant une fonction tampon de force occlusale

Also Published As

Publication number Publication date
IT201800009446A1 (it) 2020-04-15

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