JP3642831B2 - Abutment selector for dental implants - Google Patents

Description

[0001]
[Industrial application fields]
The present invention is connected and fixed to an implant fixture of a dental prosthesis maintenance device generally abbreviated as a dental implant that is embedded and fixed in an insertion hole formed in a jawbone of a missing tooth portion. The present invention relates to an abutment selection tool for a dental implant for selecting an optimum abutment as an abutment.
[0002]
[Prior art]
Conventionally, as a dental prosthesis method in a missing tooth portion, a method using a bridge and a method using a denture have been generally performed.
However, the bridge method is a method in which healthy natural teeth on both sides of the missing tooth portion are cut into abutment, and a dental prosthesis located at the missing tooth portion is fixed to a metal body engaged with the abutment. As a result, not only must healthy natural teeth have to be cut, but the dental prosthesis located in the missing tooth has the disadvantage of causing bone resorption because the occlusal pressure is not directly applied. It was.
The denture method is a method in which a denture is fixed to a denture base made of synthetic resin or the like to make a dental prosthesis. In this method, the occlusal force acting on the dental prosthesis is applied to the remaining natural teeth. And / or because it is borne by the oral mucosa, there is a sense of incongruity during use of the dental prosthesis, and there is a dull taste due to the denture base covering the taste receptors scattered in the oral mucosal tissue. In addition, there was a serious drawback that long-term use caused absorption of the ridge.
[0003]
Therefore, as a treatment method to eliminate these disadvantages, implant fixtures, which serve as maintenance and stabilization devices for dental prostheses, are embedded in the insertion holes formed in the jawbone of the missing teeth to improve the function of the roots in natural teeth. A dental prosthesis fixing device is connected to and fixed to the abutment connected and fixed to the inside of the oral cavity of the implant fixture to obtain a dental prosthesis maintenance device, and the dental prosthesis is fixed to the dental prosthesis fixing device. The technology of dental implants for fixing objects has been developed and implemented.
[0004]
When such a treatment method using a dental implant is carried out, the dental prosthesis can be fixed without covering the oral mucosa, so there is no sense of incongruity or dull taste at the time of wearing the dental prosthesis. Because it provides a feeling of use similar to that of a tooth, and because the jawbone is given an appropriate occlusal force, it has the advantage of minimizing the expected bone resorption when the implant fixture is not implanted. This therapeutic method has been rapidly developed and can be applied to single tooth defects, local defects of two or more teeth, and edentulous jaws (total tooth defects).
[0005]
In this method of treatment with a dental implant, an implant hole was formed in the jawbone of the missing tooth, and the implant fixture was embedded in the implant hole and then embedded. In order to close the screw hole exposed inside the oral cavity of the implant fixture and prevent the bone from growing from the implant fixture to the oral cavity during the healing process, the side end of the implant fixture inside the oral cavity of the implant fixture After screwing a cover screw whose part is equal to or larger than the inner end of the implant fixture and whose inner side is larger than the dimension of the implant fixture side end, the peripheral gingiva around the insertion hole is removed. Sutured and implanted implant fixture fully binds to the missing jaw bone When the surgical part due to the formation of the insertion hole is healed, the gingival part inside the oral cavity in which the implant fixture is embedded is opened again, the cover screw is removed from the implant fixture, and the oral cavity inner part of the implant fixture Screw the healing abutment on the side of the implant fixture that has the same external dimensions as the inner end of the oral cavity of the implant fixture and the length is longer than the thickness of the surrounding gingiva, and wait for the incised surrounding gingival part to heal. A two-time method of connecting and fixing a prosthesis fixing device is mainly employed.
[0006]
In this two-time method, when the surrounding gingival part that has been cut in order to screw the healing abutment heals, the healing abutment is removed from the implant fixture, and the dental prosthesis is fixed to the oral cavity inner part of the implant fixture. By screwing an abutment screw that penetrates the abutment having a gold cylinder holding portion provided in the innermost part of the oral cavity, which serves as a base for connecting and fixing the device, to the implant fixture. After connecting and fixing, an impression is taken to create a dental prosthesis, but the gold cylinder holding part of this abutment is aligned with the central axis of the implant fixture like the molar part. Connected and fixed, and some sort of There is a case where the center line of the implant fixture is inclined with respect to the central axis of the implant fixture as in the case of a tooth portion. In either case, the connection is fixed so as not to rotate with respect to the implant fixture. Is done. This is because, when the fixing device for the dental prosthesis attached to the inner portion of the oral cavity is a single tooth fixing device, the dental prosthesis is missing if the fixing device is rotated with respect to the implant fixture. This is because a phenomenon that cannot be accurately positioned in the portion occurs.
[0007]
In such a dental implant technology, in order to manufacture a dental prosthesis having a good appearance, it is provided at a portion located on the innermost side of the oral cavity that serves as a base for connecting and fixing a dental prosthesis fixing device. It is very important to select the height of the abutment having the gold cylinder holding portion. That is, the abutment is provided with a portion on the implant fixture side where the end portion on the implant fixture side is the same size as the inside end portion of the implant fixture and the inside of the mouth is larger than the size of the end portion on the implant fixture side. And the end surface inside the oral cavity of the portion provided on the side of the implant fixture must have the same dimensions as the end surface on the side of the implant fixture of the gold cylinder that is a fixing device for the dental prosthesis. However, since the thickness of the gingiva differs depending on the patient and case, various heights are prepared.
[0008]
Conventionally, this abutment is selected by, for example, having the same diameter as that of the gingival hole to be incised and having a round bar bent in a substantially L shape and coaxially with the bent portion. Corresponding to a plurality of height abutments prepared in advance on the outer periphery of the bent portion provided with a small-diameter projection that can be inserted into a female screw portion screwed inside the oral cavity of the implant fixture An abutment selection jig provided with a scale is used. This abutment selection jig has the same diameter as the whole, although the portion where the scale is provided is recessed, and the measurement portion is located inside the oral cavity of the implant fixture. It is formed so as to be fitted in line with the axis of
[0009]
However, when the treatment with the dental implant is completely completed, the abutment 2 is made by aligning the center line of the gold cylinder holding portion 2d with the central axis of the implant fixture 1 like the molar portion shown in FIG. A case where the gold cylinder 4 which is a fixing device for the dental prosthesis 6 is connected and fixed to the inside of the oral cavity of the abutment 2 and the abutment screw 3 by the screw 3, and the front tooth portion shown in FIG. The abutment 2 is connected and fixed by the abutment screw 3 by inclining the center line of the gold cylinder holding portion 2d to the central axis of the implant fixture 1, and the abutment 2 and the abutment screw 3 are placed inside the oral cavity. Gold Siri which is a fixing device for prosthesis 6 Since there is a case where the wander 4 is connected and fixed by the gold screw 5, the center line of the gold cylinder holding part 2d of the abutment 2 is inclined and fixed with respect to the central axis of the implant fixture 1 as in the latter case. In this case, the abutment selection jig cannot select the abutment 2 having the optimum height by estimating the fixed state of the abutment. Even if the dental prosthesis 6 is not formed so as to enter the implant fixture 1 side from the apex inside the oral cavity of the patient's gingiva, the oral inner side surface of the abutment 2 and the oral inner side surface of the gold cylinder 4 are exposed. Despite the fact that only a dental prosthesis 6 having a poor appearance can be formed, the patient can be seen from the inner end of the oral cavity of the implant fixture 1. Because only to measure the length of the to the top of the oral cavity side of the gingiva, selection of the abutment 2 of the optimum height has been impossible.
[0010]
[Problems to be solved by the invention]
The present invention eliminates the drawbacks in the prior art as described above, and can select an abutment having an optimum height that gives a good appearance when a dental prosthesis is fixed. It is an issue to provide.
[0011]
[Means for Solving the Problems]
As a result of diligent research to solve the above-mentioned problems, the present inventors have not yet made the conventional abutment selection jig described above having the same shape as the abutment connected and fixed to the oral cavity of the implant fixture. Or, since it has a round bar shape with the same diameter from the portion of the implant fixture that contacts the inside of the oral cavity to the inside of the oral cavity, it is not clear from which part the dental prosthesis will actually be formed In particular, in recent dental implants, the gold cylinder formed with the dental prosthesis fixed is a porcelain implant fixture that forms the outermost periphery of the dental prosthesis. Establish the base point of the side edge construction and make the porcelain thickness of the base point a certain thickness to prevent the strength of the porcelain from decreasing. The gold cylinder's abutment side is thin enough to prevent the bacteria from growing due to a gap between the inner end of the buttment and the end of the dental prosthesis on the implant fixture side. It has been proposed that a collar portion for forming a stepped portion is provided on the abutment side of the gold cylinder. It has been found that it becomes more difficult to select an optimal abutment because the collar portion without the porcelain that forms the outermost periphery of the dental prosthesis is located inside.
[0012]
Therefore, as a result of intensive research to enable the selection of an appropriate abutment, the present inventors have determined that a cylinder into which a rectangular tube-shaped portion provided inside the oral cavity of the implant fixture is inserted on the implant fixture side. And a positioning means for positioning and mounting on the inner end of the oral cavity of the implant fixture, and an abutment that is actually prepared continuously on the implant fixture side. A portion having an outer shape of the same size as the truncated cone-shaped portion of the ment, and a circular cross-sectional shape having a knob portion at the tip starting from a portion smaller than the diameter of the portion inside the oral cavity of the portion The number of monolithic dental implant abutment selectors that correspond to the actual type of abutment If it prepares, it will position by the said positioning means, insert the square cylindrical part provided in the oral cavity of the implant fixture in the said cylindrical recessed part, and will set the end surface by the side of an implant fixture inside the oral cavity of an implant fixture. Since it can reproduce the same state that the abutment was actually installed inside the oral cavity of the implant fixture by attaching it to contact, it is possible to select the optimal dental implant abutment and to manufacture it at low cost As a result, the present invention was completed.
[0013]
And as an abutment selection tool of this dental implant, a collar provided on the abutment side of the gold cylinder between the rod-shaped portion and the portion having the same outer shape as the truncated conical shape portion of the abutment If it is an aspect in which a collar portion for forming a stepped portion on the inside of the oral cavity is thin and has an outer shape with the same dimensions as the portion, it is preferable for actually forming a dental prosthesis or If a through hole for passing a string is provided in the vicinity of the knob portion of the rod-shaped part, the string passed through the through hole is mistakenly used for dental use, for example, by a dentist winding it around a hand or the like. Even if the abutment selection tool of the implant is dropped in the oral cavity, it is preferable to prevent an accident that the patient swallows the abutment selection tool. In the case of a protrusion projecting from the center of the cylindrical recess inserted into the female screw threaded on the inside of the oral cavity of the plant fixture, or a rectangular tube provided on the oral cavity of the implant fixture If it is a cylindrical recess that engages with the part, or if the rod-like part is aligned with the center axis of the implant fixture, it is screwed inside the oral cavity of the implant fixture If the male screw to be screwed into the female screw is screwed at the tip of the projection protruding from the center of the cylindrical recess provided on the implant fixture side, the implant fixture It is desirable that the abutment selection can be performed more accurately by firmly attaching the abutment selection tool of the dental implant. When the rod-shaped portion is inclined at the center line with respect to the central axis of the implant fixture, the positioning means engages with the rectangular tube-shaped portion provided inside the oral cavity of the implant fixture. If the protrusion is a cylindrical recess and is inserted into the female screw threaded inside the oral cavity of the implant fixture, the protrusion is further protruded from the center of the cylindrical recess. It was also found that it is preferable that the abutment selection can be performed more accurately by firmly attaching the abutment selection tool for the dental implant.
[0014]
Hereinafter, embodiments of an abutment selector for dental implants according to the present invention will be described in detail with reference to the drawings.
FIG. 1 is a perspective view showing an embodiment of an abutment selection tool for a dental implant according to the present invention when the rod-shaped portion has a center line aligned with the central axis of the implant fixture, and FIG. FIG. 3 is a central longitudinal cross-sectional view of the dental implant abutment selector according to the present invention shown in FIG. 1, and FIG. 3 shows an outer shape having the same dimensions as the truncated cone-shaped portion of the abutment compared to the embodiment shown in FIG. FIG. 4 is a perspective view showing another embodiment corresponding to FIG. 1 of the abutment selector for a dental implant according to the present invention having a low height and a collar portion, and FIG. 4 shows the center of the implant fixture. FIG. 5 is a perspective view showing another embodiment of the dental implant abutment selector according to the present invention when the center line is inclined with respect to the axis. FIG. FIG. 6 is a longitudinal sectional view in a plane passing through the center line of the projection of the abutment selector of the dental implant according to the invention, and FIG. 6 has the same dimensions as the frustoconical shape portion of the abutment compared to the embodiment shown in FIG. FIG. 6 is a perspective view showing another embodiment corresponding to FIG. 4 of the dental implant abutment selector according to the present invention in which the height of the portion having the outer shape is low and the collar portion is not present.
[0015]
First, the structure of the dental implant is set such that the center line of the gold cylinder holding portion coincides with the central axis of the implant fixture shown in FIG. 7, and the abutment is connected and fixed by an abutment screw. An abutment in which the center line of the gold cylinder holding portion is inclined with respect to the central axis of the implant fixture in FIG. 8 and the cross-sectional explanatory view for explaining the treatment completion state in which the gold cylinder in which the dental prosthesis is formed is connected and fixed by the gold screw The cross section explanatory drawing explaining the treatment completion state which connected and fixed the gold cylinder which formed the dental prosthesis inside the oral cavity of this abutment and the abutment screw with the abutment screw. There will be described.
[0016]
Reference numeral 1 denotes a titanium implant fixture that is embedded in a hole formed in the jawbone of the missing tooth portion, the tip of which is substantially hemispherical, and the subsequent portion is related to the jawbone in the surrounding predetermined portion. The substantially cylindrical shape provided with the joint portion 1c is formed, and an end portion of the substantially cylindrical portion is provided with a rectangular cylindrical portion 1a such as a hexagonal shape. A female screw 1b reaching the columnar part is screwed.
[0017]
2 is a titanium abutment that is connected and fixed to the inside of the oral cavity of the implant fixture 1 and serves as a base for connecting and fixing a gold cylinder 4 that is a fixing device for a dental prosthesis 6 described later. 1 side edge part has the same outer diameter as the outer diameter of the substantially cylindrical part edge of the implant fixture 1, and comprises the frustoconical shape part 2a whose outer diameter becomes large as it leaves | separates from the implant fixture 1, In addition, on the side of the implant fixture 1, the rectangular cylindrical recess 2 b with which the rectangular cylindrical portion 1 a of the implant fixture 1 is engaged (for example, when the rectangular cylindrical portion 1 a of the implant fixture 1 is hexagonal). Hexagonal or dodecagonal recesses), and the outer peripheral side perpendicular to the axis of the truncated cone-shaped portion 2a is inside the oral cavity of the truncated cone-shaped portion 2a. The surface 2c is provided, and the gold cylinder holding portion 2d is provided at the center of the frustoconical shape portion 2a and located most inside the oral cavity, and a bolt is provided at the center of the frustoconical shape portion 2a. A hole 2e is formed through. As the abutment 2, the thickness of the gingiva differs depending on the patient, so that the height of the truncated conical portion 2 a is, for example, 0.4 mm, 1 mm, 2 mm, 3 mm, 4 mm, 5.5 mm, 7 mm, 8.5 mm, 10 mm. Various heights such as 9 types are prepared. As described above, the abutment 2 includes a mode in which the center line is aligned and fixed to the central axis of the implant fixture 1, such as a molar portion and some anterior teeth, as described above, There is a mode in which the center line of the implant fixture 1 is inclined with respect to the central axis of the implant fixture 1 like the anterior tooth portion, and these are connected to each other. In the case of an embodiment in which the center line of the implant fixture 1 is aligned and fixed so that the center line coincides with the center axis of the implant fixture 1, the center axis of the gold cylinder holding portion 2d is a frustoconical shape. In the case of an embodiment that matches the axial center of the portion 2a and is connected and fixed with the center line inclined with respect to the central axis of the implant fixture 1, the gold described above Linder holding section 2d has female screw 2f the oral cavity inner side of the gold cylinder holding portion 2d with its central axis is slant at a predetermined angle relative to the axis of the frusto-conical portion 2a is screwed.
[0018]
Reference numeral 3 denotes an abutment screw for connecting and fixing the abutment 2 to the inside of the oral cavity of the implant fixture 1, and the abutment 2 is connected to the central axis of the implant fixture 1 by aligning the center line of the gold cylinder holding portion 2 d. In the case of being fixed, a female screw 3b is screwed on the head, and the head is followed by a bolt hole 2e of the abutment 2 and screwed into the female screw 1b of the implant fixture 1. A stopper 3c that abuts on the inner end surface of the abutment 2 is provided on the outer peripheral portion of the abutment 2 on which the male screw 3a to be attached is screwed, and the abutment 2 is the center of the implant fixture 1 When the center line of the gold cylinder holding part 2d is inclined and connected and fixed to the shaft A slit 3d is formed in the head, and a male screw 3a that passes through the bolt hole 2e of the abutment 2 and is screwed into the female screw 1b of the implant fixture 1 is screwed on the head. A stopper portion 3c that comes into contact with the end surface on the inner side of the abutment 2 is provided on the outer peripheral portion located on the inner side of the oral cavity.
[0019]
4 is a gold cylinder made of a noble metal alloy which is connected and fixed to the inside of the oral cavity of the abutment 2 which is connected and fixed to the inside of the oral cavity of the implant fixture 1 by the abutment screw 3. Is provided with a flat surface 4a that is in contact with an outer peripheral plane 2c perpendicular to the axis of the truncated conical portion 2a of the abutment 2, and the inside of the oral cavity has a diameter reduced from the flat surface 4a. The cast piece fixing part 4b of the dental prosthesis 6 having a predetermined outer shape is formed, and the inside has a space part that can accommodate the head of the abutment screw 3 and the gold cylinder holding part 2d of the abutment 2. This space is provided with an engagement portion 4c that engages with the gold cylinder holding portion 2d of the abutment 2, and the gold The head of the clew 5 is embedded to form a protrusion 4e that supports the head of the gold screw 5, and the outer surface of the cast piece fixing portion 4b on the innermost side of the oral cavity is a cast of a dental prosthesis 6 to be described later. In order to prevent the piece 6a from being detached from the cast piece fixing portion 4b, a head 4f having an enlarged outer shape is provided, and the cast piece 6a of the dental prosthesis 6 is cast on the head 4f. In general, a flat surface portion serving as a role for preventing rotation around the fixing portion 4b is provided. Further, it is preferable that a collar portion 4d for forming a stepped portion on the inner side of the oral cavity is provided on the implant fixture 1 side. As described above, the abutment 2 is connected to the central axis of the implant fixture 1 so that the center line of the gold cylinder holding portion 2d is aligned and fixed as the gold cylinder 4 as described above. The center line of the part 4b also coincides with the center axis of the implant fixture 1, and the abutment 2 is connected and fixed with the center line of the gold cylinder holding part 2d inclined with respect to the center axis of the implant fixture 1. In the case of the embodiment, the center line of the cast piece fixing part 4b coincides with the center line of the gold cylinder holding part 2d inclined with respect to the center axis of the implant fixture 1.
[0020]
6 is a dental prosthesis comprising a cast piece 6a cast in a state of being fixed to the outer periphery of the cast piece fixing portion 4b of the gold cylinder 4, and a porcelain 6b formed on the outer periphery of the cast piece 6a. A hole 6c of a size that allows the head of the gold screw 5 to be inserted is provided in the oral cavity at an extension of the center line of the cast piece fixing portion 4b, and the dental prosthesis 6 is inserted into the gold screw 5 by the hole 6c. After being connected and fixed to the abutment 2 or the abutment screw 3 by the above, it is sealed with dental cement or the like.
[0021]
【Example】
7 is an abutment selection tool for a dental implant according to the present invention, and a cylindrical recess 7a into which a rectangular cylindrical portion 1a provided on the inside of the oral cavity of the implant fixture 1 is inserted on the implant fixture 1 side. And an abutment which is actually prepared continuously on the side of the implant fixture 1. A section 7d having an outer shape of the same size as that of the second truncated cone-shaped portion 2a, and a cross section starting from a portion smaller than the diameter of the portion 7d inside the oral cavity of the portion 7d and having a knob 7g at the tip If the material is an integral structure with a circular rod-shaped part 7e and is not harmful even if inserted into the oral cavity, such as metal or plastic Any material may be used, and for example, the portion 7d having the same outer shape as the truncated cone-shaped portion 2a of the abutment 2 and the rod-shaped portion 7e may be provided with different colors.
[0022]
The same size as the collar portion 4d provided on the abutment 2 side of the gold cylinder 4 between the rod-like portion 7e and the portion 7d having the same outer shape as the truncated conical shape portion 2a of the abutment 2 It is preferable that a collar portion 7f for forming a stepped portion on the inner side of the oral cavity is provided with a small thickness having the outer shape. Further, it is preferable that the knob 7g at the tip of the rod-like portion 7e is provided with a knurl on its peripheral surface as shown in the illustrated embodiment, so that hand slipping can be prevented. If a through hole 7h for passing a string is provided in the vicinity of the knob 7g of the rod-shaped part 7e, the string is wound around the through hole 7h and wound around the dentist's hand. It is more preferable because an accidental accident due to the fall of the abutment selector 7 can be prevented.
[0023]
The positioning means for positioning and mounting on the inner end of the oral cavity of the implant fixture 1 is provided so as to protrude from the center of the cylindrical recess 7a provided on the implant fixture 1 side. This is a projection 7b that is inserted into a female screw 1b that is screwed on the inside of the oral cavity, or a cylindrical recess 7a that engages with a rectangular tubular part 1a that is provided on the inside of the oral cavity of the implant fixture 1. In some cases, when the rod-like portion 7e has its center line aligned with the central axis of the implant fixture 1, it has an outer shape having the same dimensions as the truncated conical shape portion 2a of the abutment 2. Screw the screw 7 into the oral cavity of the implant fixture 1 at the tip of the projection 7b which is the positioning means provided on the implant fixture 1 side of the portion 7d. More preferably, a male screw 7c to be screwed into the female screw 1b is provided, and the rod-like portion 7e is inclined with respect to the central axis of the implant fixture 1. Is a female screw 1b that is screwed into the oral cavity of the implant fixture 1 from the center of the cylindrical recess 7a that is the positioning means that engages with the square cylindrical part 1a provided on the oral cavity of the implant fixture 1. However, in this case, screwing the male screw into the protrusion 7b causes the abutment selector 7 of the dental implant to rotate, thereby causing the adjacent tooth Or the inner surface of the oral cavity may occur.
[0024]
[Action]
In order to perform treatment with a dental implant using the dental implant abutment selector 7 according to the present invention having the above-described structure, the implant fixture 1 is embedded in the jawbone of the missing tooth of the patient. An implant hole is formed, and the implant fixture 1 is embedded in the implant hole, and the screw hole of the female screw 1b exposed to the inside of the oral cavity of the implant fixture 1 which is subsequently embedded is closed and healed. In order to prevent the bone from growing from the implant fixture 1 to the inside of the oral cavity in the process, the end of the implant fixture 1 on the inside of the oral cavity of the implant fixture 1 is the outer diameter of the inside of the oral cavity of the implant fixture 1. Covers in which the inside of the oral cavity is the same or larger than the dimensions of the end portion of the implant fixture 1 After screwing the screw into the female screw 1b, the surrounding gingiva of the embedding hole is sutured, and the embedded implant fixture 1 is sufficiently bonded to the jawbone of the missing tooth portion, so that the substantially cylindrical portion of the implant fixture 1 is formed. When the surgical part is healed in a state where it does not rotate unless a large external force is applied by the action of the engaging portion 1c provided in the surrounding predetermined part and the insertion hole is formed, the implant fixture 1 is The inserted gingival portion inside the oral cavity is incised again, the cover screw is removed from the implant fixture 1, and the implant fixture 1 side has the same outer shape as the oral inner end portion of the implant fixture 1 in the oral cavity inner portion of the implant fixture 1. A healing abutment whose dimensions are longer than the thickness of the surrounding gingiva Kusucha to ambient gingival moiety incision screwed into the female screw 1b exposed to the oral cavity inner side of one waits for the cure it is conventional.
[0025]
Thus, when the surrounding gingival portion that has been incised for screwing the healing abutment is healed, the healing abutment is removed from the implant fixture 1 and the fixing device for the dental prosthesis 6 is connected and fixed to the oral cavity inner portion of the implant fixture 1. For making a dental prosthesis 6 after passing through the abutment 2 which is a base for the abutment and screwing the abutment screw 3 to the female screw 1b of the implant fixture 1 to connect and fix the abutment 2 The impression is taken, but the abutment selection tool 7 for a dental implant according to the present invention is used to determine the height of the abutment 2 to be selected as the abutment 2. .
[0026]
In other words, the inner part of the oral cavity of the patient from which the healing abutment has been removed from the implant fixture 1 is in a state in which a hole substantially equal to the outer shape of the healing abutment is formed in the gingiva, and the oral cavity of the implant fixture 1 In general, the rectangular tube-shaped portion 1a provided at the end of the substantially cylindrical portion on the inside is in a state where it is difficult to see. In such a state, the end portion on the side of the implant fixture 1 is the same size as the end portion on the inside of the oral cavity of the implant fixture 1, and the inside surface of the oral cavity is formed to be larger than the size of the end portion on the side of the implant fixture 1. The abutment 2 having the same dimensions as the end surface of the implant 1 on the gold cylinder 4 serving as a fixing device for the dental prosthesis 6 has an optimum height corresponding to the thickness of the gingiva that varies depending on the patient. Abutment 2 needs to be selected.
[0027]
Therefore, the dental according to the present invention is provided with a portion 7d having the same outer shape as the truncated cone-shaped portion 2a of the abutment 2 that is actually prepared that seems to be appropriate in relation to the gingival position of the patient. The implant abutment selector 7 is inserted into the cylindrical recess 7a provided on the implant fixture 1 side by the square cylindrical portion 1a provided on the inside of the oral cavity of the implant fixture 1 and is positioned by the positioning means. An implant fixture of the abutment selector 7 for a dental implant according to the present invention is mounted on the inner end of the oral cavity of the fixture 1 so that the side of the implant fixture 1 is positioned. As the abutment 2 that is actually used by visual inspection when the end surface on the 1 side is in contact Than we select those suitable height.
[0028]
In order to position and install the implant fixture 1 side of the abutment selector 7 of this dental implant at the inner end of the oral cavity of the implant fixture 1, it is actually prepared continuously on the implant fixture 1 side. A rod-shaped portion having a circular cross-sectional shape provided in an integral structure starting from a portion smaller than the diameter of the portion 7d inside the portion 7d having the same outer shape as the truncated conical portion 2a of the abutment 2 7e If the handle 7g at the tip of 7e is gripped, and if a through-hole 7h for threading is provided in the vicinity of this knob 7g, pass the string through this through-hole 7h and place the string on the dentist's hand, etc. For example, the positioning means is screwed from the center of the cylindrical recess 7a provided on the implant fixture 1 side to the inside of the oral cavity of the implant fixture 1. In the case of the projection 7b fitted into the screw 1b, the projection 7b may be fitted into the female screw 1b, and the cylinder that engages with the rectangular tube-like portion 1a provided inside the oral cavity of the implant fixture 1 In the case of the cylindrical concave portion 7a, the cylindrical concave portion 7a may be inserted around the square cylindrical portion 1a so as to be engaged with the rectangular cylindrical portion 1a.
[0029]
The rod-like portion 7e can be aligned with the central axis of the implant fixture 1, and is screwed into a female screw 1b that is screwed inside the oral cavity of the implant fixture 1 at the tip of the projection 7b. When the male screw 7c to be joined is screwed, the abutment selection tool 7 of the dental implant is turned at the knob 7g and the male screw 7c is inserted so as to be screwed into the female screw 1b.
Further, the rod-shaped portion 7e can be inclined with respect to the central axis of the implant fixture 1, and the rod-shaped portion 7e is formed from the center of the cylindrical recess 7a provided on the implant fixture 1 side. When the protrusion 7b that is inserted into the female screw 1b that is screwed inside the oral cavity is further protruded, the protrusion 7b is inserted so as to be inserted into the female screw 1b.
[0030]
At this time, as shown in FIG. 8, even when the cast piece fixing portion 4b of the gold cylinder 4 is connected and fixed with its central axis aligned with the central axis of the implant fixture 1, as shown in FIG. Even if the cast piece fixing portion 4b of the four is connected and fixed with its central axis inclined with respect to the central axis of the implant fixture 1, if the abutment selector 7 for a dental implant according to the present invention is used, The same state as when the abutment 2 is actually connected and fixed to the implant fixture 1 with the abutment 2 entering the implant fixture 1 side from the apex inside the oral cavity of the patient's gingiva can be reproduced. The abutment of the optimal height can be established by establishing the base point of the end of the porcelain 6b that forms the outer periphery of the implant fixture 1 side end. Selection of cement 2 than is possible.
[0031]
【The invention's effect】
As described in detail above, in the dental implant abutment selector 7 according to the present invention, the rectangular tube-shaped portion 1a provided on the inside of the oral cavity of the implant fixture 1 is inserted into the implant fixture 1 side. A cylindrical recess 7a is provided, and positioning means for positioning and mounting on the inner end of the oral cavity of the implant fixture 1 is provided, and it is actually prepared continuously on the implant fixture 1 side. A portion 7d having the same outer shape as the truncated conical shape portion 2a of the abutment 2 is provided, and further, a portion smaller than the diameter of the portion 7d is started on the inside of the oral cavity of the portion 7d and is picked at the tip. The operation of selecting the abutment 2 for a dental implant because the rod-shaped part 7e having a circular cross section having the part 7g is provided. There is no drawback that the components are separated and the patient swallows the components, or that the components are separated and lost in the process of disinfection for re-use.
[0032]
In particular, the base point of the foundation of the implant fixture 1 side end of the porcelain 6b that forms the outermost periphery of the dental prosthesis 6 on the abutment 2 side of the cast piece fixing portion 4b of the gold cylinder 4 is determined. Bacteria and the like propagate between the inner end of the oral cavity of the abutment 2 and the end of the dental prosthesis 6 on the side of the implant fixture 1 by reducing the thickness to a certain extent. When the collar part 4d for forming the stepped part is formed on the inside of the oral cavity so that no gap is generated, only the thickness of the collar part 4d of the gold cylinder 4 as the abutment 2 is provided. The abutment 2 having a small thickness must be selected, but the abutment 2 of the gold cylinder 4 is interposed between the rod-like portion 7e and the portion 7d having the same outer shape as the frustoconical portion 2a of the abutment 2. The dental implant according to the present invention is provided with a collar portion 7f for forming a stepped portion on the inside of the oral cavity having a thin outer shape having the same dimensions as the collar portion 4d provided on the toment 2 side. If the abutment selection tool 7 is used, it is possible to select the abutment 2 in consideration of the base point of the construction of the end portion of the dental fixture 6 side of the porcelain 6b that forms the outermost periphery of the dental prosthesis 6. .
[0033]
In addition, since the knob 7g is provided further inside the oral cavity of the rod-like part 7e, the position of the dental implant abutment 2 is selected by holding the knob 7g and performing the operation of selecting the abutment 2 of the dental implant. In particular, a protrusion 7b protrudes from the center of a cylindrical recess 7a into which a rectangular tube 1a provided inside the oral cavity of the implant fixture 1 is inserted, and the tip of this protrusion 7b In the case where the male screw 7c is screwed to the portion, the male screw 7c at the tip of the projection 7b is screwed to the female screw 1b screwed inside the oral cavity of the implant fixture 1 by this knob 7g. The abutment selector 7 for a dental implant according to the present invention can be easily rotated, and this effect is further promoted if a knurling is provided on the outer periphery of the knob 7g.
[0034]
Furthermore, when a through hole 7h for threading is provided in the vicinity of the knob 7g of the rod-shaped part 7e having the knob 7g at the tip, a dentist passes the string through the through hole 7h and puts the string in a hand or the like. When an operation for selecting the abutment 2 of the dental implant is performed by winding or the like, an accidental accident due to the fall of the abutment selection tool 7 of the dental implant can be prevented.
[0035]
As positioning means for positioning and mounting on the inner end of the oral cavity of the implant fixture 1, it is inserted into a female screw 1b that is screwed into the oral cavity of the implant fixture 1 from the center of the cylindrical recess 7a. In the case of the former, the protrusion 7b may be a cylindrical recess 7a that engages with a rectangular tube 1a provided inside the oral cavity of the implant fixture 1. An abutment for a dental implant can be inserted into the female screw 1b, and in the latter case, the cylindrical concave portion 7a can be inserted around the rectangular cylindrical portion 1a so as to engage with the rectangular cylindrical portion 1a. The operation of positioning and mounting the selector 7 on the inner end of the oral cavity of the implant fixture 1 is very simple.
[0036]
In addition, when the rod-like portion 7e can be aligned with the central axis of the implant fixture 1, the implant fixture of the portion 7d having the same outer shape as the truncated conical shape portion 2a of the abutment 2 is used. When a male screw 7c that is screwed into a female screw 1b that is screwed inside the oral cavity of the implant fixture 1 is screwed at the tip of the projection 7b that is the positioning means provided on the char 1 side, Since the male abutment 7c is securely screwed into the female screw 1b, the dental implant abutment selector 7 according to the present invention can be reproduced in exactly the same state as that fixed to the inside of the oral cavity of the implant fixture 1. And the inner surface of the oral cavity of the implant fixture 1 and the inner surface of the oral cavity of the implant fixture 1. The mistake of selecting the abutment 2 of the dental implant with no gap between them will not occur.
[0037]
Further, when the rod-like portion 7e is inclined with respect to the central axis of the implant fixture 1, it engages with the rectangular tube-like portion 1a provided on the inside of the oral cavity of the implant fixture 1. If there is further provided a projection 7b fitted into the female screw 1b screwed into the oral cavity of the implant fixture 1 from the center of the cylindrical recess 7a as the positioning means, the relationship with the patient's gingival position Implanting an abutment selector 7 for a dental implant according to the present invention provided with a part 7d having an outer shape of the same dimensions as the frustoconical part 2a of an actually prepared abutment 2 The work of attaching the fixture 1 is easy.
[0038]
In this way, the dental prosthesis part located on the missing tooth portion by cutting healthy natural teeth on both sides of the missing tooth portion, as in the conventional method using the bridge or the denture, which is a dental prosthesis method in the missing tooth portion. The occlusal pressure is not directly applied to the skin, causing bone resorption at the site, and the denture base covers taste receptors that occur when using dental prosthesis or are scattered in the oral mucosal tissue. It is possible to produce a dental prosthesis in a form that fits the anatomical knowledge of the tooth, including the restoration of aesthetics, without the disadvantage of causing blunt taste and causing absorption of the ridge by prolonged use. The dental implant according to the present invention can select an abutment having an optimal height that gives a good appearance when a dental prosthesis is connected and fixed in the treatment with a dental implant that can be performed. Value to contribute to the dental field of the abutment selection tool is very large.
[Brief description of the drawings]
FIG. 1 is a perspective view showing an embodiment of an abutment selection tool for a dental implant according to the present invention in a case where a rod-shaped portion has its center line aligned with the center axis of an implant fixture.
FIG. 2 is a central longitudinal cross-sectional view of the dental implant abutment selector according to the present invention shown in FIG. 1;
FIG. 3 shows an abutment of a dental implant according to the present invention in which the height of the part having the same outer shape as the frustoconical part of the abutment is lower than that of the embodiment shown in FIG. It is a perspective view which shows the other Example corresponding to FIG.
FIG. 4 is a perspective view showing another embodiment of the dental implant abutment selector according to the present invention in a case where the rod-shaped portion is inclined with respect to the central axis of the implant fixture. is there.
FIG. 5 is a longitudinal sectional view taken along a plane passing through the center line of the protrusion of the abutment selector of the dental implant according to the present invention shown in FIG. 4;
FIG. 6 shows an abutment of a dental implant according to the present invention in which the height of the part having the same outer shape as the frustoconical part of the abutment is lower than that of the embodiment shown in FIG. It is a perspective view which shows the other Example corresponding to FIG. 4 of a ment selection tool.
FIG. 7: Abutment is connected and fixed by an abutment screw so that the center line of the gold cylinder holding part coincides with the central axis of the implant fixture, and a dental prosthesis is formed inside the abutment and the oral cavity of the abutment screw. It is sectional explanatory drawing explaining the treatment completion state which connected and fixed the gold cylinder connected with the gold screw.
FIG. 8: The abutment is connected and fixed with an abutment screw by inclining the center line of the gold cylinder holding part to the central axis of the implant fixture to form a dental prosthesis inside the oral cavity of the abutment and the abutment screw. It is sectional explanatory drawing explaining the treatment completion state which connected and fixed the gold cylinder connected with the gold screw.
[Explanation of symbols]
1 Implant fixture
1a Square tube
1b Female thread
1c Engagement part
2 Abutment
2a frustoconical shape
2b Square cylindrical recess
2c Perimeter side plane
2d gold cylinder holder
2e Bolt hole
2f Female thread
3 Abutment screw
3a male screw
3b Female thread
3c Stopper part
3d slot
4 Gold cylinder
4a plane
4b Cast piece fixing part
4c Engagement part
4d color section
4e Projection
4f head
5 Gold screw
6 Dental prosthesis
6a cast piece
6b Porcelain
6c hole
7 Abutment selector for dental implant according to the present invention
7a Tubular recess
7b Projection
7c male screw
7d Abutment with the same outer shape as the frustoconical part of the abutment
7e Bar
7f Collar with the same outer dimensions as the gold cylinder collar
7g knob
7h Through hole

Claims (7)

On the side of the implant fixture (1), there is provided a cylindrical recess (7a) into which a rectangular cylindrical portion (1a) provided inside the oral cavity of the implant fixture (1) is inserted, and the implant fixture Positioning means for positioning and mounting on the inner end of the oral cavity of the char (1) is provided, and the abutment (2) actually prepared continuously on the side of the implant fixture (1) is provided. A portion (7d) having an outer shape with the same dimensions as the frustoconical portion (2a) is provided. An abutment selector (7) for a dental implant, characterized in that the abutment selector (7) has a monolithic structure in which a rod-like part (7e) having a circular section having a knob part (7g) is provided. Between the rod-shaped part (7e) and the part (7d) having the same outer shape as the truncated cone-shaped part (2a) of the abutment (2), on the abutment (2) side of the gold cylinder (4) The dental part according to claim 1, wherein a collar part (7f) for forming a stepped part on the inner side of the oral cavity is provided with a thin thickness having the same external shape as the collar part (4d) provided. Implant abutment selector (7). The dental implant abutment selector (7) according to claim 1 or 2, wherein a stringing through hole (7h) is provided in the vicinity of the knob (7g) of the rod-shaped part (7e). The positioning means protrudes from the center of the cylindrical recess (7a) provided on the implant fixture (1) side, and is internally threaded (1b) screwed into the oral cavity of the implant fixture (1). The dental implant abutment selector (7) according to any one of claims 1 to 3, which is a protrusion (7b) fitted into the dental implant. A positioning means is a cylindrical recessed part (7a) engaged with the square cylindrical part (1a) provided in the oral cavity of the implant fixture (1), The any one of Claim 1 to 3 Dental implant abutment selector (7). When the rod-like portion (7e) is aligned with the central axis of the implant fixture (1), the female screw (1b) screwed inside the oral cavity of the implant fixture (1) A male screw (7c) to be screwed onto the projection fixture (1) is screwed to the tip of a projection (7b) projecting from the center of a cylindrical recess (7a) provided on the implant fixture (1) side. Abutment selector (7) for dental implants according to claim 4. When the rod-like portion (7e) is inclined with respect to the central axis of the implant fixture (1), the female screw (inside the oral cavity of the implant fixture (1) ( The dental implant abutment selector (7) according to claim 5, wherein the projection (7b) fitted into 1b) is further projected from the center of the cylindrical recess (7a).

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