FR3093284A1 - Dental implant abutment mounting device, implantation kit and associated dental prosthesis preparation method - Google Patents

Abstract

Dental implant abutment mounting device, implantation kit and associated dental prosthesis preparation method The device comprises a sleeve (5) extending along a longitudinal axis for inserting a dental implant (25) into a bone support of a patient, the sleeve (5) comprising: - a cylindrical distal hollow region (140) for cooperation with an implant pillar (30) defining an insertion bore of a head of the implant pillar (125) and at least one member for engaging the head of the implant. implant abutment (125) suitable for making the implant abutment (30) and the sleeve (5) integral in rotation; and - a proximal region (142) for cooperation with a clamping tool comprising on a transverse face, a tool cavity intended to receive the tool, the cylindrical distal hollow region (140) defining with the proximal region (142) a stop locking (143) of the sleeve (5) relative to a guide. Figure for abstract: Figure 4

Description

Dental implant abutment mounting device, implantation kit and method for preparing a dental prosthesis

The present invention relates to a dental implant abutment mounting device.

The invention applies particularly to the preparation and fitting of a dental prosthesis fixed in the jawbone by means of implants, in the context of guided dental surgery.

In classic unguided surgery, the implants are introduced into the jawbone after successive drilling of holes intended to receive them. These drillings are most of the time carried out without guidance, by freehand, which sometimes leads to an inappropriate positioning of the implant, and consequently, of the prosthesis.

In guided dental surgery, it is known to manufacture a guide with a shape complementary to the jaw of the patient. The guide is provided with drilling guide holes through which the drills are guided, then the implant introduced. This ensures improved drilling and positioning accuracy.

Nevertheless, the angle of implantation of the implant in relation to the jawbone remains very variable.

Once all the implants have been placed during the intervention, it is therefore necessary to make a cast of the position and the angle of implantation of the implant pillars before making the final prosthesis. A temporary prosthesis must be installed on the patient, which is tedious. In addition, the time to make the final prosthesis, the position and/or the orientation of the implants can still change.

Document WO 2008/006802 A1 describes a kit for manufacturing a prosthesis before implantation. This kit includes a guide in a shape complementary to the jaw including guide holes, defined according to the surgical operation to be performed to put the prosthesis in place.

The guide is placed on the model and the drilling of implant fixation holes on the model is guided by the guide holes of the guide. Implant templates are inserted into the implant mounting holes through a mounting device.

The above-mentioned manufacturing kit makes it possible to manufacture permanent dental prostheses directly on the model, which normally adapt better to the position of the implants once the surgery has been performed.

However, the aforementioned kit does not guarantee that the placement of the implants is sufficiently precise to correspond perfectly to this prosthesis, which can lead to a lack of comfort for the patient, or even the need to redo the prosthesis.

An object of the invention is therefore to obtain an assembly device suitable for use in guided surgery to sufficiently improve the placement of the implant and its pillar, so that the placement of a prosthesis can be carried out. immediately after surgery.

To this end, the subject of the invention is a device for mounting a dental implant pillar of the aforementioned type, comprising a sleeve extending along a longitudinal axis for inserting a dental implant into a bone support of a patient. , the sleeve comprising:

- a cylindrical distal hollow region for cooperating with an implant pillar defining an insertion bore for a head of the implant pillar and at least one member for engaging the head of the implant pillar capable of being secured in rotation of the implant abutment and the sleeve; and

- a proximal region for cooperating with a tightening tool comprising, on a transverse face, a tool recess intended to receive the tool, the cylindrical distal hollow region defining with the proximal region an abutment for blocking the sleeve with respect to a guide.

The dental implant pillar assembly device according to the invention may comprise one or more of the following characteristics, taken separately or in any technically possible combination:

- the engagement member is formed by a longitudinal rib, the cylindrical distal hollow region advantageously comprising several engagement members each formed by a longitudinal rib;

- the insertion bore is conical, with a maximum diameter at the distal end of the sleeve;

- the tool print has a polygonal section, advantageously hexagonal;

and

- the device comprises a depth positioning washer, intended to engage around the distal region and to come into abutment against the blocking abutment.

The invention further relates to a dental implantation kit comprising:

- at least one dental implant and for each dental implant an implant abutment each implant abutment comprising an abutment head; and

- an application guide against a biological wall, the guide defining a guide sleeve for each implant;

the kit comprising, for the or each dental implant, a mounting device as defined above, the sleeve being able to be mounted on the head of the implant pillar by inserting the head of the implant pillar into the bore of insertion, the sleeve provided with the implant pillar being insertable by being axially guided in the guide sleeve to an inserted position of the implant in which the assembly device is in abutment against an abutment surface of the guide.

The dental implant kit may include one or more of the following characteristics, taken individually or in any technically possible combination:

- the assembly device comprises a wedging washer of internal diameter substantially equal to the external diameter of the distal region of the sleeve, the wedging washer being able to be placed around the sleeve, between the locking abutment of the sleeve and the guide abutment surface;

- the kit comprises, for each implant, a retaining screw able to pass through the socket right through, the retaining screw having a head able to be in contact with the bottom of a wedging region distal to the imprint of tool and a threaded part intended to be screwed into the implant abutment;

- the kit includes a dental prosthesis capable of being mounted on at least one implant abutment; and

- the implant abutment and the implant form a single piece.

The invention also relates to a method for preparing a dental prosthesis before its implantation, comprising the following steps:

- supply of a jaw molding and a kit as defined above, the guide having a distal face of a shape complementary to that of the jaw molding;

- installation of the guide on the molding of the jaw and formation in the molding of the jaw of a fixing hole of the implant on the molding of the jaw;

- insertion of the implant abutment into the insertion bore of the sleeve, the implant abutment being integral in rotation with the implant; and

- joint screwing of the assembly formed by the implant abutment, the sleeve and the implant, using a tool inserted in the tool impression, in the hole for fixing the implant on the jaw molding, the sleeve provided with the implant abutment being guided axially in the guide.

All the steps of this process are carried out completely away from a human or animal being, prior to surgery.

The process according to the invention may comprise one or more of the following steps, taken individually or in all technically possible combinations:

- prior to the screwing step, securing in rotation of the implant abutment and the sleeve including the screwing of the sleeve on the implant abutment with the retaining screw;

- following the screwing step, unscrewing of the retaining screw and rotational separation of the implant abutment and the sleeve;

- the insertion of a washer around the distal region of the sleeve, the screwing of the sleeve stopping when the locking abutment of the sleeve is wedged against the washer, the washer resting against the abutment surface of the guides;

- disassembly of the sleeve;

- removal of the jaw molding guide; and

- formation or adjustment of a dental prosthesis on the implant mounted in the jaw molding.

The invention will be better understood on reading the following description, given solely by way of non-limiting example and made with reference to the drawings in which:

Figure 1 is a perspective representation of a socket of a dental implant abutment mounting device according to the invention;

Figure 2 is a sectional representation of the sleeve of Figure 1, along a plane including its axis of revolution;

Figure 3 is a sectional representation of a wedging washer of the dental implant pillar mounting device according to the invention, along a plane including its axis of revolution;

Figure 4 is a representation of an implant, implant abutment, guide washer, sleeve, retaining screw, and tightening tool of an implant kit. location;

Figure 5 is a representation of a guide placed on a jaw molding;

Figure 6 is a cross-sectional schematic representation of an implant, implant abutment, guide washer, sleeve, retaining screw, tightening tool, and implantation kit and a guide during a prosthesis mounting process on a jaw molding or on a patient; and

Figure 7 is a cross-sectional schematic representation of an implant and implant abutment installed on a patient.

Within the meaning of the present invention, the term “distal” means closer to the patient and further from the practitioner, and the term “proximal” as closer to the practitioner and further from the patient. The use of the terms “distal” and “proximal” is understood here in the context of the invention when the implant is installed on a patient.

A device for mounting a dental implant pillar 1 according to the invention is illustrated in Figures 1 to 3. Device 1 comprises a sleeve 5 and advantageously a washer 10, visible respectively in Figures 2 and 3.

Referring to Figures 4 and 5, the assembly device 1 is used within a dental implant kit 15 comprising a guide 20 intended to facilitate the drilling of holes in the jaw, at least one implant 25 intended to insert into a hole made in the jaw, at least one implant pillar 30 mounted in the implant 25, and at least one screw 35 for holding the prosthesis on the pillar 30. The kit 15 comprises at least one prosthesis 40, represented schematically in Figure 7, intended to be fixed on the implant pillar 30.

As visible in Figures 5 and 6, the guide 20 is made to measure for each patient.

It comprises a support structure 50 having at least one region 57 for guiding the implant and a distal face 45 intended to rest on the jaw of the patient.

Guide 20 further includes at least one member 55 for holding support structure 50 on the patient's jaw.

The distal face 45 of the guide has a shape complementary to the jaw of a patient.

The support structure 50 is made from resin. The shape of the support structure 50 is defined by taking an impression of the patient's jaw. The impression can be optical or made using a hardening paste in which a plaster model is cast which is then scanned by a dental laboratory.

The holding member 55 passes through the support structure 50 via a holding hole 60. It is capable of being secured to a molding 215 of the jaw of a patient (see FIG. 5) during the stages of preparation of the prosthesis , then to the patient's jaw during surgery.

The holding member 55 comprises an enlarged head 65, wider than the diameter of the holding hole 60. The guide 20 is capable of being gripped between the enlarged head 65 and the molding 215 or the jaw of a patient. The retaining member 55 is for example a metal retaining screw, for example made from brass (for the moulding) or titanium (during implantation on the patient).

Each guiding region 57 comprises a guiding sleeve 75 delimiting a well 77 for guiding the implant. The guide sleeve 75 protrudes from the support structure 50 from a proximal face 80 of the support structure 50. The guide sleeve 75 comprises an abutment surface 85, perpendicular to the axis AA of the sleeve guide 75.

The guide well 77 forms a bore passing right through the guide 20 through the guide sleeve 75, from the abutment surface 85 to the distal face 45 of the guide 50. The guide well 77 is here cylindrical, of axis of revolution AA.

The guide well 77 is internally delimited by a metal guide sleeve 95, embedded in the guide sleeve 75.

Referring to Figures 4 and 6, the implant 25 is elongated along an axis of revolution. As visible in Figure 7, the implant 25 is hollow. It defines a blind interior distal tapping 105 and a conical proximal bore 110 opening on a proximal face of the implant 25, substantially perpendicular to the axis of revolution of the implant 25.

The opening is defined by the wider section of the tapered bore 110. The narrower section of the tapered bore defines one end of the implant thread 105.

Implant 25 is sealed at its distal end. The distal end is here spherical.

The outer surface of implant 25 is at least partially threaded. The thread extends the majority of the length of the implant 25 from the distal end to the proximal side.

As seen in Figure 4, the implant pillar 30 is elongated along a longitudinal axis. It comprises a distal threaded region 115, a conical intermediate region 120 in continuity with the threaded region and a proximal abutment head 125.

The threaded region 115 is adapted to be screwed into the implant thread 105.

Tapered region 120 is complementary in shape to tapered bore 110 of implant abutment 30, to be received within tapered bore 110.

The implant pillar 30 is thus able to be secured with the implant 25, the contact between the conical bore 110 and the conical region 120 ensuring the precision of the assembly. This type of assembly is generally called cold welding.

The implant abutment head 125 extends in the continuity of the tapered abutment region 120. It is here substantially tapered with its narrower end located at the proximal end of the implant abutment 30.

The tapered region defines at least one longitudinal groove 130.

The pillar head 125 comprises for example at least two longitudinal grooves 130. Advantageously, the pillar head comprises four longitudinal grooves 130. The pillar head 125 also defines at its end an access opening on a tapped region 135.

Referring to Figures 1 and 2, the sleeve 5 comprises a cylindrical distal hollow region 140 and a proximal region 142 defining with the distal region 140 a blocking abutment 143 of the sleeve 5 with respect to the guide 20.

The distal region 140 defines a distal abutment head insertion bore 145 125 and a through lumen 147.

The distal bore 145 is tapered and includes at least one implant abutment head engagement member 150.

Each engagement member 150 is for example a rectilinear rib. The distal bore 145 comprises for example two engagement members 150, advantageously four engagement members 150.

The distal bore 145 has a complementary shape to the implant abutment head 125. The longitudinal grooves 130 are adapted to be received in the engagement members 150 of the head.

The interaction between the longitudinal grooves 130 and the engagement members 150 is thus suitable for making the implant pillar 30 and the sleeve 5 integral in rotation around the axis common to the sleeve 5 and to the implant pillar 30 .

The outer peripheral face of the distal region 140 is cylindrical. The outer diameter of the cylindrical distal hollow region 140 is combined with the inner diameter of the guide sleeve 95. The sleeve 5 is therefore able to be inserted into the guide well 77 while being guided axially along the axis AA with respect to the guides 20.

Advantageously, the diameter of the distal region is 4.40 mm or 4.70 mm. The length of the distal region is advantageously 9 mm, 7.5 mm, 6.0 mm, 4.5 mm.

The through lumen 147 is coaxial with the distal region 140. It opens at its distal end into the distal bore 145 and at its proximal end into a wedging region 160.

The blocking abutment 143 is adapted to be placed in abutment on the abutment surface 85 to define the depth of insertion of the implant 25.

The proximal region 142 defines, in its proximal face, a region of cooperation 163 with a first tightening tool.

The cooperation region 163 here comprises a tool cavity 161, intended to receive the first tightening tool. The tool cavity 161 opens into the wedging region 160, the wedging region 160 being between the tool cavity 161 and the through hole 147.

In the example shown in Figure 1, the cavity 161 has a hollow comprising at least three sides. The hollow advantageously comprises six sides. The depth of the tool indentation is for example 2 mm.

The prosthesis retaining screw 35 is able to be introduced into the through-lumen 147 and into the abutment head 125 through the bottom of the tool cavity 161.

Referring to Figure 4 and Figure 6, the prosthesis retaining screw 35 includes a threaded portion 185 and a head 190 disposed at the proximal end of the threaded portion 185. The head 190 includes a region of cooperation with a second clamping tool.

The head 190 is able to be introduced into the wedging region 160 and to rotate in this region, below the tool cavity 161.

The threaded part 185 is able to be screwed into the tapped region 135 of the abutment head 125. The retaining screw 35 is thus able to secure the sleeve 5 and the implant abutment 30 in a longitudinal direction, when placing in place of the implant pillar, as visible in Figure 6, then the prosthesis 40 and the implant pillar 30 after fixing the implant 25, as visible in Figure 7.

Referring to Figure 3, the washer 10 includes a central hole 195 of diameter equal to the outer diameter of the distal region 140 of the sleeve. The washer 10 has a distal face 200 intended to bear against the abutment surface 85 and a proximal face 202 intended to bear against the locking abutment 143.

The thickness of the washer 10, defining the gap between the faces 200, 202 is advantageously equal to 1.50 mm or 3.00 mm. The gap between the abutment surface 143 of the sleeve 5 and the bearing surface 85 of the guide 20 can, depending on the stacking of the different washers 10, be equal to 1.5 mm, 3 mm, 4, 5mm or 6mm. This difference is a function of the length of the conical intermediate region 120, also called the transgingival height of the pillar 30, which is equal to 1.5 mm, 3 mm, 4.5 mm, 6 mm.

As shown schematically in Figure 7, the prosthesis 40 is for example a replica of the outer part of at least one tooth, outside the gum.

The prosthesis 40 is for example made up of several replicas of teeth integral with one another. The prosthesis 40 internally defines a transscrewing hole 205 opening onto a proximal face of the prosthesis 210 and a conical bore 213, similar to the distal bore 145, on the face opposite the proximal face of the prosthesis 210 to receive the abutment head 125 .

The trans-screwing hole 205 opens onto the bottom of the conical bore 213. The prosthesis retaining screw 35 is able to pass through this trans-screwing hole 205 and to be screwed into the abutment head 125.

A dental implantation method according to the invention will now be described. This process includes a phase of geometric adjustment, a phase of preparation of the dental prosthesis before its implantation, and a phase of assembly of the prosthesis.

The geometric adjustment phase initially includes taking an impression of the patient's jaw. The impression is for example made physically using a hardening paste and/or is made from a scanner of the patient. The generated impression is used to create a digital model of the patient's jaw and to fabricate jaw molding 215 (see Figure 5), which is a three-dimensional reproduction of the patient's jaw.

The position and orientation of implants 25 and implant abutments 30 is then determined from the digital model and/or molding of the patient's jaw. The guide 20, adapted to the patient's jaw and to the planned implantation operations, is then manufactured using the digital model.

The prosthesis preparation phase includes a first step of installing the implants 25 and the abutments 30 in the jaw molding 215.

The guide 20 of complementary shape to the molding 215 is placed on the molding 215. It is fixed on the molding 215 with holding members 55.

The dental technician then drills holes 220 for fixing the implant in the molding 215 using a drill. The drill bit is guided axially by the guide sleeve 95 during drilling, ensuring positioning and orientation in accordance with that desired.

This being done, the implant pillar 30 is put in place by screwing onto the implant 25 intended to be implanted in the hole 220. Then, the implant pillar head 125 is introduced into the distal bore 145 of the socket 5.

The prosthesis retaining screw 35 is screwed with the implant pillar 30 through the sleeve 5, to secure the sleeve 5 and the assembly formed by the implant pillar 30 and the implant 25. Once screwed, the threaded part 185 is received in the tapped region 135 of the pillar head 125. The head 190 of the retaining screw 35 is pressed against the wedging region 160, below the bottom of the tool cavity 161.

Advantageously, one or more washers 10 are then placed around the distal region 140 of the sleeve 5 depending on the length of the conical intermediate region 120 of the pillar 30.

The assembly thus formed is then screwed in one piece into the implant fixing hole 220 on the molding 215, using a tool inserted in the tool recess 161.

According to the invention, the screwing is guided axially, by the conjugate contact between the distal region 140 of the sleeve 5 and the guide sleeve 95. This guarantees an adequate and reproducible positioning and orientation of the implant 25 in the hole 220 .

The assembly is screwed to an inserted position of the implant 25 in which the washers 10 are clamped between the abutment surface 85 and the locking abutment 143, and are no longer mobile in rotation around the sleeve 5.

The retaining screw 35 is then unscrewed and the sleeve 5 is extracted away from the implant abutment head 125. The washers 10 are removed.

The holding members 55, as well as the guide 20 are then removed from the jaw molding 215.

The implants 25 as well as the implant abutments 30 are then positioned on the jaw molding 215 in accordance with the modeling, as well as the planned surgery, which will be performed later on the patient's jaw.

Then, the prosthesis 40 is manufactured with a geometry adapted to be mounted on the pillars of implants 30, the pillars of implants 30 being installed on the molding 215 having been positioned in a precise and reproducible manner during surgery thanks to the use of each socket 5, optionally fitted with a washer 10.

Once the prosthesis has been manufactured and adjusted on the molding 215, the assembly phase of the prosthesis 40 on the patient is carried out.

This phase includes the supply of the same elements as for the preparation phase of the prosthesis, namely the guide 20, each sleeve 5 optionally provided with at least one washer 10, the implants 25 and the implant pillars 30. The prosthesis 40 is also provided to be mounted at the end of surgery.

The guide 20 is placed on the jaw of the patient, the distal face 45 of the guide being in contact with the gums and possibly with the teeth which also serve as wedging and which may or may not be extracted at the end of the surgery.

For each retaining hole 60, a retaining member 55, for example a titanium screw, is then screwed into the patient's jaw through the guide 20, the retaining members 55 securing the guide 20 to the patient's jaw.

For each guide well 77, a hole is then made in the jaw, through the guide wells 77, using successively drilling, boring and tapping tools, guided by the guide sleeve 95. The tools thus guided axially ensure a positioning and an orientation of the hole substantially identical to that which was obtained on the molding 215.

Then, for each guide hole 77, an implant abutment 30 and an implant 25 are assembled. The implant pillar 30 is in particular placed by screwing onto the implant 25 outside the patient's mouth.

As described above, the head of the abutment 125 is introduced into the distal bore 145 and the engagement members 150 cooperate with the longitudinal grooves 130.

The retaining screw 35 is introduced through the tool cavity 161, the through-bore 147, then the threaded region 135 of the implant pillar to secure the sleeve 5 to the implant pillar 30. Advantageously, at least one washer 10 is engaged around the distal region 140 of the sleeve 5 depending on the length of the conical intermediate region 120 or transgingival height 120 of the pillar 30, the implantation depth of the implant 25 always being the same with respect to to the bearing surface 85 of the guide 20.

This assembly comprising the implant 25, the implant pillar 30, the sleeve 5, the prosthesis retaining screw 35 and advantageously a washer 10 is then screwed into the holes prepared in the patient's jaw using a tool inserted in tool cavity 161.

The screwing is guided axially, by the conjugate contact between the distal region 140 of the sleeve 5 and the guide sleeve 95. Thus, the positioning and orientation of the implant 25 is identical to that carried out on the jaw molding 215 , with a precision of the order of 10 to 20 micrometers.

Just as in the prosthesis preparation phase, the assembly is screwed on until the abutment surface 143 comes into contact with the abutment surface 85 (see FIG. 6) and/or until the washers 10 are clamped between the abutment surface 85 and the locking abutment 143, without rotation around the sleeve 5.

Each retaining screw 35 is then unscrewed and the sleeve 5 as well as each washer 10 are removed.

The holding members 55 as well as the guide 20 are detached from the patient.

The prosthesis 40 is then placed directly and immediately on the implant pillars 30 after extraction of the remaining teeth, if any. The retaining screw 35 is installed to fix the prosthesis 40 on the implant abutment head 125 through the transscrewing hole 205.

This placement can be performed directly following surgery, without the need to take an impression of the position and orientation of the implants 25 and the implant abutments 30 in the patient's jawbone.

Indeed, the use of sleeves 5, optionally provided with washers 10, guarantees that the prosthesis 40 previously manufactured using the jaw model 215 is mounted directly on the patient's jaw, with great precision, just after the implantation of implants 25.

The use of the sleeves 5 ensures identical positioning of the implants 25 and the implant abutments 30 (depth, position, angular orientation) in the jaw model 215 and in the jaw of the patient.

Thus, it is not necessary to equip the patient with a temporary prosthesis, which increases comfort and reduces costs.

Moreover, the assembly of the final prosthesis being consecutive to the surgery, the risk that the implants change position and/or orientation due to the constraints applied in the jaw, before the installation of the final prosthesis is deleted.

According to a particular embodiment, the implant 25 and the implant pillar 30 form a single one-piece implant.

Claims (14)

Device (1) for mounting a dental implant pillar (30) comprising a sleeve (5) extending along a longitudinal axis for inserting a dental implant (25) into a patient's bone support, the sleeve (5) comprising:
- a cylindrical distal hollow region (140) cooperating with an implant pillar (30) defining an insertion bore (145) of a head of the implant pillar (125) and at least one engagement member ( 150) of the head of the implant pillar (125) capable of making the implant pillar (30) and the sleeve (5) integral in rotation; and
- a proximal region (142) of cooperation with a tightening tool comprising on a transverse face, a tool cavity (161) intended to receive the tool, the cylindrical distal hollow region (140) defining with the proximal region (142 ) a locking abutment (143) of the sleeve (5) relative to a guide (20). Device according to Claim 1, in which the engagement member (150) is formed by a longitudinal rib, the cylindrical distal hollow region (140) advantageously comprising several engagement members (150), each formed by a longitudinal rib. Device according to claim 1 or 2, in which the insertion bore (145) is tapered, of maximum diameter at the distal end of the sleeve (5). Device according to any one of the preceding claims, in which the tool cavity (161) has a polygonal section, advantageously hexagonal. Device according to any one of the preceding claims, comprising at least one depth positioning washer (10), intended to engage around the distal region (140) and to come into abutment against the locking abutment (143). Dental implantation kit (15), comprising:
- at least one dental implant (25), and for each dental implant (25) an implant pillar (30), each implant pillar (30) comprising a pillar head (125); and
- a guide (20) for application against a biological wall, the guide (20) defining for each implant (25) a guide sleeve (95);
the kit (15) comprising for the or each dental implant (25), a mounting device (1) according to any one of the preceding claims, the sleeve (5) being adapted to be mounted on the head of the implant pillar (125) by inserting the implant abutment head (125) into the insertion bore (145), the sleeve (5) provided with the implant abutment (30) being insertable by being guided axially in the sleeve guide (95) of the guide (20) to an inserted position of the implant (25) in which the mounting device (1) abuts against an abutment surface (85) of the guide (20). Kit according to Claim 6, in which the mounting device (1) comprises a shim washer (10) of internal diameter substantially equal to the external diameter of the distal region (140) of the sleeve (5), the washer (10) wedging being able to be placed around the sleeve (5), between the locking abutment (143) of the sleeve (5) and the abutment surface (85) of the guide (20). Kit according to any one of claims 6 or 7, comprising, for each implant (25), a retaining screw (35) capable of passing right through the sleeve (5), the retaining screw (35) having a head (190) adapted to be in contact with the bottom of a wedging region (160) distal to the tool cavity (161) and a threaded part (185) intended to be screwed into the implant pillar ( 30). Kit according to any one of Claims 6 to 8, comprising a dental prosthesis (40) adapted to be mounted on at least one implant pillar (30). A kit according to any of claims 6 to 9, wherein the implant post (30) and the implant (25) form a single piece. Method for preparing a dental prosthesis (40) before its implantation, comprising the following steps,
- supply of a jaw molding (215) and a kit (15) according to any one of claims 6 to 10, the guide (20) having a distal face (45) of complementary shape to that of the molding jaw (215);
- installation of the guide (20) on the jaw molding (215) and formation in the jaw molding (215) of a fixing hole (220) of the implant (25) on the jaw molding (215);
- insertion of the implant pillar (30) into the insertion bore (145) of the sleeve (5), the implant pillar (30) being integral in rotation with the implant (25); and
- joint screwing of the assembly formed by the implant pillar (30), the sleeve (5) and the implant (25), using a tool inserted in the tool cavity (161) , in the fixing hole (220) of the implant (30) on the jaw molding (215), the sleeve (5) provided with the implant pillar (30) being guided axially in the guide (20). Method according to claim 11, further comprising the following steps:
- prior to the screwing step, securing in rotation of the implant pillar (30) and the sleeve (5) comprising screwing the sleeve (5) onto the implant pillar (30) with a retaining screw (35); and
- Following the screwing step, unscrewing of the retaining screw (35) and the rotational separation of the implant pillar (30) and the sleeve (5). Method according to any one of claims 11 or 12, comprising the insertion of a washer (10) around the distal region (140) of the sleeve (5), the screwing of the sleeve (5) stopping when the locking abutment (143) of the sleeve (5) is wedged against the washer (10), the washer (10) resting against the abutment surface (85) of the guide (20). A method according to any of claims 11 to 13, comprising:
- removal of the sleeve (5);
- removal of the guide (20) from the jaw molding (215); and
- forming or fitting a dental prosthesis (40) on the implant (25) mounted in the jaw molding (215).