JPH0710268B2 - Dental implant superstructure manufacturing method and implant adapter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is a dentist performing an impression of a head, making a plaster model, a temporary prosthesis, and a technique operation in order to manufacture an upper structure as a denture on a head exposed from the gingiva of a dental implant. The present invention relates to a method for manufacturing an implant superstructure, an upper structure part forming a part of the implant superstructure, facilitating the manufacturing of the superstructure, and a member used for gingival retraction for clarifying impression taking.

[0002]

2. Description of the Related Art Dental implants are precisely processed and manufactured in accordance with standards and are commercially available in various types, and the dimensional accuracy of a series of products used in each system is extremely high.

In order to manufacture a perfect superstructure as a denture for an implant which is a standard product with high accuracy,
Careful work is required to make a clear impression of the shoulder (shoulder) formed between the anchor portion embedded in the gingiva and the implant head exposed to the outside of the gingiva, and to precisely match the shoulder margin.

[0004]

However, the accuracy of the shoulder margin of the implant upper structure is
It is affected by various conditions during the technical work, and it is easy for the technical work to vary, and the implant upper structure is likely to be defective. 1 (a) is a successful example in which the implant superstructure 10 fits well with the shoulder margin 20, while FIG. 1 (b) shows a failed example in which the implant superstructure margin is insufficient or insufficient. Show. If the margin of the upper structure of the implant is excessive or insufficient, plaque and calculus are likely to adhere, and adverse effects such as gingivitis and bone resorption appear.

Furthermore, in order to obtain an impression, a complicated dedicated kit is required or a ceramic core tube for using an occlusal screw is used (ITI system).
As such, the work is extremely complicated and requires careful attention to the operation, which causes a considerable mental and physical burden on the technician and is extremely high in cost.

After implanting the implant, a work called "gingival expulsion" is performed to prevent the gingiva from covering the shoulder. There is a method of using an electric scalpel as one of the currently performed gingival retraction methods, but this may induce gingival retraction and is not preferable because the implant body is a conductive metal.

[0007] Furthermore, there is a method of using a pressure-removing thread as another method of pressure-relieving the gingiva, but it is difficult to obtain a clear impression when the gingiva is inflamed for a long period of time with a temporary prosthesis.

[0008] As described above, even a plaster model for work, which has been created by carrying out the complicated work carefully and with difficulty, is fragile and easily broken, and requires careful management.

Therefore, an object of the present invention is to provide a method and an implant for manufacturing a dental implant superstructure, which makes it possible to easily manufacture a superstructure that properly fits an implant shoulder margin located near the upper edge of the gingiva. To get the adapter.

Further, an object of the present invention is to obtain an implant adapter for gingival retraction that can surely perform gingival retraction without using an electric knife or a retraction thread and thus without damaging the gingiva.

[0011]

In order to achieve this object, a method for manufacturing a dental implant superstructure according to the present invention comprises a method of forming an inner surface corresponding to at least a side surface of an outer surface of the implant head before taking an impression of the implant head. It is provided with a substantially frusto-conical cover part having a and a lower end of this cover part, which precisely fits the shoulder margin of the implant close to the upper edge of the gingiva and is continuous with the contour of the implant body buried in the gingiva and has a smooth contour. An implant adapter having a flange portion for providing the above is attached to the head.

Further, the implant adapter for gingival retraction according to the present invention is an adapter to be attached directly to an implant or to an implant head, and when it is put on the implant or the implant head, it protrudes below a margin of a shoulder of the implant, and it is a shoulder of the shoulder. It is characterized in that a peripheral edge having a radius larger than the radius is provided.

[0013]

Before the impression of the implant head is taken, the cover portion of the implant adapter of the present invention whose inner surface is preformed so as to be closely fitted to various commercially available implant heads which are extremely strictly processed according to the standard When mounted on, the flange portion of the implant adapter precisely fits the shoulder margin of the implant, providing a continuous, smooth contour to the contour of the gingiva-implanted implant body. An impression is taken with the implant adapter attached, and a superstructure as a denture is formed outside the implant adapter. Therefore, according to the method of the present invention, the lower edge of the superstructure is moved above the shoulder margin of the implant in which the upper edge of the gingiva is entangled,
The shoulder portion of the implant does not automatically and precisely fit the flange portion of the implant adapter to form a step.

Further, according to the implant adapter for gingival retraction according to the present invention, the lower peripheral edge surely retires the gingiva.

[0015]

The preferred embodiments of the present invention will now be described with reference to the drawings.

In the preferred embodiment of the method for making a dental implant superstructure of the present invention, it may be necessary to remove the upper gingival margin over the implant shoulder before or after mounting the implant head on the implant. In such a case, a gingival retraction implant adapter as shown in FIGS. 2A and 2B is attached to the implant 1.
2 (a) shows a screw cap type gingival retraction implant adapter 2 used before the implant head is attached to the implant 1, and FIG. 2 (b) shows the implant head 3 attached to the implant 1. The implant adapter 5 for gingival retraction which is attached by the occlusal screw 4 after the operation is shown. The peripheral edges of these implant adapters 2 and 5 for gingival retraction protrude below the shoulder 1a of the implant 1 and have a radius larger than the radius of the shoulder 1a. The upper edge GU of the gingiva which covers the implant shoulder 1a is excluded by the peripheral edge of the implant adapter for gingiva removal. In this way, the upper edge of the gingiva is not covered by the implant shoulder, and then the implant head is fitted with the implant adapter according to the present invention.

FIG. 2 (c) shows a method of performing gingival exfoliation when taking an impression with an individual implant tray. In this case, with respect to the implant head 3 of the implant 1 equipped with the implant head 3. Implant adapter for gingival retraction that fits with a certain fixed clearance
The primary impression material FI is filled in 5a. This primary impression material FI
When the gingival retraction implant adapter 5a filled with is pressed against the implant head 3, the primary impression material FI in the gingival retraction implant adapter 5a is the gingival retraction implant adapter 5a by the volume of the implant head 3.
It is extruded from the gap between the lower peripheral edge of the shoulder and the shoulder 1a. The lower peripheral edge of the gingival retraction implant adapter 5a, which protrudes below the shoulder 1a and has a radius larger than the radius of the shoulder 1a, and the extruded primary impression material FI.
Ensures gingival retraction by and. After that, the individual implant tray 11a filled with the secondary impression material SI is pressed against the gingiva-removed state by the gingival compression implant adapter 5a and the primary impression material FI to obtain an impression.

FIG. 3 shows an upper structure as a temporary prosthesis before the production of a formal denture. This upper structure is composed of a temporary prosthesis (temporary crown) 6 and an implant adapter 7. To do. This implant adapter 7
A truncated cone-shaped cover portion 7a having an inner surface corresponding to the outer surface of the implant head 3, which is a precision standard product, and a shoulder margin 1a of the implant 1 that is provided at the lower end of this cover portion and is close to the upper edge of the gingiva. And a flange portion 7b which is adapted to give a smooth contour to the contour of the implant body buried in the gingiva.

3 (a-1) and 3 (a-2) are both based on a method of temporarily attaching the upper structure to the implant head 3 with cement, and the implant adapter 7 of FIG. 3 (a-1) is used. Is made of synthetic resin, and the implant adapter 7 in FIG. 3 (a-2) is made of metal. Both (b-1) and (b-2) of FIG. 3 are based on the method of attaching the upper structure to the implant head 3 with the occlusal screw 4, and the implant adapter 7 of (b-1) of FIG. It is made of synthetic resin, and the implant adapter 7 in FIG. 3B-2 is made of metal.

For the temporary prosthesis (temporary crown) 6, it is preferable to use an instant polymerization or photopolymerization synthetic resin. Further, in this case, on the outer peripheral surface of the implant adapter 7, an undercut for preventing disengagement of the temporary prosthesis made of synthetic resin, for example, a plurality of horizontal annular ridges or spiral spiral grooves separated from each other in the longitudinal direction. Is preferably formed. Figure 3 (a-1),
The implant adapters 7 of (b-1) and (b-2) also cover the top surface of the implant head 3, while the implant adapter 7 of (a-2) of FIG. 3 covers the top surface of the implant head 3. do not do.

FIG. 4 shows an upper structure as a formal denture, which is composed of a cast outer crown 8 and an implant adapter 9 made of metal. 4 (a-1), (a-
2) shows an example in which the superstructure is cemented to the implant head 3, and (b-1) and (b-2) in FIG. 4 show examples in which the superstructure is attached by the occlusal screw 4. Indicates. This implant adapter 9 is provided with a substantially frustoconical cover portion 9a having an inner surface corresponding to the outer surface of the implant head 3, which is also a precision standard product, and the implant 1 provided at the lower end of this cover portion and close to the gingival upper edge. And a flange portion 9b that precisely fits the shoulder margin 1a of the above and gives a continuous smooth contour to the contour of the implant body buried in the gingiva. Furthermore, the cover portion 9a
Three vertical ridges 9c are provided on the peripheral surface of the same at equal intervals in the circumferential direction. With this vertical ridge 9c, the casting outer cap 8
The position of the implant adapter 9 and the implant adapter 9 can be accurately aligned, and the angular deviation can be reliably prevented. Implant adapter 9 shown in (a-1) and (b-1) of FIG.
Also covers the top surface of the implant head 3. Of FIG.
(a-2), (b-2) shows the cross section in the top surface of the implant adapter 9 of a superstructure.

In order to manufacture the superstructure of the implant, if necessary, the method of the present invention is used after removing the gingival covering by the method shown in FIGS. 2 (a) and 2 (b) or another method. First, by covering the implant head 3 with the implant adapter 9 (or 7) which is preformed so as to precisely fit the shoulder margin 1a of the implant 1 and to closely fit the outer contour of the implant head 3, the occlusal measurement is performed. I'll go. After that, as shown in FIG. 5A, the impression of the implant head 3 with the implant adapter 9 (or 7) attached thereto is taken by the tray 11 containing the impression material 10.

Next, as shown in FIG. 5 (b), the implant adapter 9 (or 7) is attached to the tray 11 having the impression taken.
After that, the transfer pin 12 or the dowel pin 13 is placed at a predetermined position on the impression taking tray 11 in which the implant adapter 9 (or 7) is fitted, and the plaster for work is injected by inserting the plaster as in the conventional case. Create model 14 (Fig. 6)
reference).

Next, as shown in FIGS. 6A and 6B,
The implant adapter 7 or 9 is fitted again to the working plaster model 14, and a synthetic resin is laid on the implant adapter 7 or 9 in the temporary prosthesis forming process to form the temporary prosthesis 6 (see FIG. 6). (a)), and a wax pattern 8a is formed in the wax-up process ((b) of FIG. 6). After the wax-up process is completed, the cast outer crown 8 (see FIG. 4) is cast in the same manner as the conventional one.

[0025]

According to the present invention, before the impression of the implant head is taken, the inner surface is preformed so as to be closely fitted to various commercially available implant heads which are processed extremely strictly according to the standard. When fitted with a corresponding implant adapter, the flange part of the implant adapter automatically fits precisely into the shoulder margin of the implant and gives a continuous and smooth contour to the contour of the implant body buried in the gingiva, so that the implant It is possible to avoid a step due to excess or deficiency in the implant shoulder margin portion of the superstructure.

Therefore, the impression taking work can be performed very easily and easily without the need for skill and careful handling by a technician. Further, it is not necessary to perform a careful correction work on the working plaster model after that, and it becomes possible to eliminate a wax-up error in the shoulder margin.

Furthermore, according to the implant adapter for gingival retraction of the present invention, without using an electric knife or a retraction thread,
Therefore, the gingiva is reliably excluded without damaging the gingiva,
A clear impression can be taken.

[Brief description of drawings]

FIG. 1 (a) is a diagrammatic explanatory view showing a state in which an implant superstructure conforms to an implant shoulder margin, and FIG. 1 (b) shows an implant superstructure not conforming to an implant shoulder margin. It is a diagrammatic explanatory view showing a state.

FIG. 2 is a diagrammatic explanatory view showing an implant adapter for gingival retraction, where (a) shows a screw cap type adapter, (b) shows an occlusal screw type adapter, and (C) [Fig. 4] is a diagrammatic explanatory view showing a method of performing gingival retraction using an implant adapter when taking an impression with an individual implant tray.

FIG. 3 shows an embodiment of an implant adapter according to the present invention used for producing a temporary prosthesis, (a-1) is a longitudinal sectional view, a longitudinal sectional view of a cement temporary cementation type synthetic resin adapter, (a-2) is a vertical cross-sectional view of a cement temporary cement type metal adapter, (b-1) is a vertical cross-sectional view of an occlusal screw type synthetic resin adapter, and (b-2) is an occlusal screw type. 3 is a vertical sectional view of the metal adapter of FIG.

FIG. 4 shows an embodiment of an implant adapter according to the present invention used for producing a cast outer crown, (a-1) is a longitudinal sectional view of a cemented cement type metal adapter, and (a-2) is A cross-sectional view of a temporary cement-on metal adapter, (b-1) is a vertical cross-sectional view of an occlusal screw-type metal adapter, (b-1)
-2) is a cross-sectional view of an occlusal screw type metal adapter.

FIG. 5 (a) is a diagrammatic explanatory view at the time of taking an impression of an implant head equipped with the implant adapter according to the present invention, and FIG. It is a diagrammatic explanatory view showing the stage of trying to create a plaster model.

6A is a diagrammatic explanatory view showing a state in which an implant adapter according to the present invention is attached to a working plaster model to create a temporary prosthesis, and FIG. 6B is a diagram showing the working plaster model. FIG. 3 is a diagrammatic explanatory view showing a state in which a wax pattern for forming a cast outer crown is formed by mounting the implant adapter according to the invention.

[Explanation of symbols]

1 Implant 1a Implant shoulder 2 Gingival retraction implant adapter (screw cap type) 3 Implant head 4 Occlusal screw 5 Gingival retraction implant adapter (occretal screw type) 5a Gingival retraction implant adapter (primary impression material filling type) ) 6 Temporary prosthesis (temporary crown) 7 Implant adapter 7a Cover part 7b Flange part 8 Cast outer crown 8a Wax pattern 9 Implant adapter 9a Cover part 9b Flange part 9c Longitudinal ridge 10 Impression material 11 Tray 11a Implant tray 12 Transfer pin 13 Dowel pin 14 Gypsum model for work FI Primary impression material SI Secondary impression material

Claims (6)

[Claims] 1. A method for producing a dental implant superstructure, which comprises taking an impression of a head, making a plaster model, temporary prosthesis, and performing a procedure for producing an upper structure as a denture on a head exposed from the gingiva of a dental implant. Before taking an impression of the implant head, a substantially frusto-conical cover part having an inner surface corresponding to at least a lateral side of the outer surface of the implant head and an implant provided at the lower end of this cover part and close to the upper gingival edge. Dental implant superstructure, characterized in that the head is fitted with an implant adapter having a flange portion that precisely fits the shoulder margin of the present invention and that gives a smooth contour to the contour of the implant body buried in the gingiva. Production method. 2. An adapter mounted on the head of a dental implant before the head impression is taken in order to manufacture a superstructure as a denture on the head exposed from the gingiva of the dental implant, which is at least a side surface of the outer surface of the implant head. It is provided with a substantially frustoconical cover part having an inner surface corresponding to and a lower end of this cover part, which precisely fits the shoulder margin of the implant close to the upper edge of the gingiva and is continuous with the contour of the implant body buried in the gingiva. An implant adapter having a flange portion that gives a smooth and smooth contour. 3. The implant adapter of claim 2, wherein the cover portion has a closed top surface that covers the top surface of the implant head. 4. The implant adapter according to claim 2, wherein at least two longitudinal ridges are provided on the peripheral surface of the cover portion at equal intervals in the circumferential direction. 5. The implant adapter according to claim 2 or 3, wherein an undercut is provided on a peripheral surface of the cover portion to prevent detachment of the temporary prosthesis made of synthetic resin. 6. An adapter for mounting directly on the implant or on the implant head, which, when fitted over the implant or implant head, projects below the margin of the shoulder of the implant and has a radius greater than the radius of the shoulder. An implant adapter for gingival retraction, characterized by being provided with.