JP5820767B2 - Jig for removing dental abutment from implant fixture - Google Patents

Description

  The present invention relates to a dental implant system in which a dental abutment in which a dental prosthesis is firmly or temporarily fixed is fixed to a dental implant fixture and used. When the dental prosthesis used for a while is removed, the dental abutment to which the damaged dental prosthesis is fixed is removed from the dental implant fixture or used for a temporary use. The present invention relates to a jig for removing a dental abutment from an implant fixture for removing the dental abutment from which the dental prosthesis has been removed from the dental implant fixture.

  As a treatment method to recover the lost oral function of the missing tooth part, the dental implant fixture that becomes an artificial tooth root that is embedded in the jaw bone of the missing tooth part and bone-bonded with the jaw bone, There is a treatment method using a dental implant system for fixing a dental abutment to which a prosthesis is fixed, or fixing a dental abutment and temporarily fixing a dental prosthesis to the dental abutment. It has become widespread.

  The dental implant fixture in such a dental implant system includes a conical hole tapered from the inside of the oral cavity that opens along the central axis toward the jawbone and the positioning of the dental abutment on the jawbone side of this hole. And an engagement recess for preventing rotation, such as a hexagonal hole shape, and a female screw into which a male screw of an abutment screw for fixing a dental abutment to the jawbone side is screwed. Things are widely used.

  And, as a dental abutment attached to this dental implant fixture, a through hole having a step portion with which the head of the abutment screw abuts is provided along the central axis, and the outer shape is provided on the jawbone side. A tapered conical portion and an engaging portion such as a hexagonal column for positioning and preventing rotation are provided at the tip of the conical portion, and the conical shape protrudes from the inner surface of the oral cavity of the dental implant fixture into the oral cavity. A portion having a prosthesis fixing portion to which a dental prosthesis is fixed further inside the oral cavity of the flange-shaped portion that comes into contact with the gingival surface is used on the inner side of the oral cavity (see Patent Document 1, for example) .

  In such a dental implant system, a conical hole tapered toward the jaw bone provided inside the oral cavity of a dental implant fixture that becomes an artificial tooth root that is embedded in the jaw bone and bone-bonded to the jaw bone. Insert a tapered conical part opposite the flange part of the dental abutment where the dental prosthesis is firmly fixed to the prosthesis fixing part inside the oral cavity of the flange part, or temporarily Insert a tapered conical portion on the opposite side of the flange-shaped portion of the dental abutment to which the dental prosthesis used for the dental prosthesis has not yet been fixed to the prosthesis fixing portion, and an engaging portion at the tip of the conical portion Is engaged with the engagement recess following the tapered conical hole of the dental implant fixture and positioned so as not to rotate, and is then provided through the dental prosthesis and the dental abutment. Insert the abutment screw into the through-hole or through-hole provided through the dental abutment, and connect the male screw of the abutment screw to the female screw that is screwed to the most jawbone side of the dental implant fixture A dental abutment or a dental prosthesis used temporarily for which a dental prosthesis is fixed so that the head of the abutment screw is in contact with the step of the through hole by screwing After fixing the dental abutment to which the object is not fixed to the dental implant fixture, the inside of the oral cavity of the through hole provided in the dental prosthesis is sealed with dental cement or used temporarily. The dental prosthesis is temporarily fixed to the prosthesis fixing part of the dental abutment where the dental prosthesis is not fixed. It is to complete the care.

  And if a patient who has completed treatment of such a dental implant system eats a hard thing, for example, if the dental prosthesis is damaged, it is necessary to replace the dental prosthesis with a new dental prosthesis. Become. At this time, since the dental prosthesis is integrated with the dental abutment, the dental abutment integrated with the damaged dental prosthesis is removed from the dental implant fixture, and a new dental prosthesis is obtained. A dental abutment with a dental prosthesis fixed is manufactured and fixed to the dental implant fixture. The dental abutment is directed toward the jawbone side provided inside the oral cavity of the dental implant fixture. The male screw inserted into the tip of the abutment screw with the tapered conical portion inserted into the tapered cone hole is screwed into the female screw screwed on the most jawbone side of the dental implant fixture. When concatenated, the tapered cone is firmly fixed in close contact with the tapered cone hole of the dental implant fixture Since the dental cement that has sealed the through hole provided in the dental prosthesis is removed, a screwdriver is inserted into the through hole of the dental abutment and the dental implant of the abutment screw Even if the abutment screw is removed by releasing the screwing with the fixture, a phenomenon often occurs in which the dental abutment cannot be easily removed from the dental implant fixture. In addition, the temporary dental prosthesis that was used by fixing the temporary dental prosthesis to the dental abutment in order to prepare the occlusion and gingiva in the preparation stage of the dental prosthesis A similar phenomenon may occur when removing the object and removing the dental abutment from the dental implant fixture.

  If such a phenomenon occurs, if the dental prosthesis is a dental prosthesis in the front tooth part, the damaged dental prosthesis or temporary dental prosthesis can be removed by opening the patient wide open. The dental abutment can be removed by moving the dental abutment away from the dental implant fixture, that is, in the direction of the tooth axis of the dental implant fixture. If the dental prosthesis is a dental prosthesis in the molar part, particularly the molar part, there is no large space in the direction of the tooth axis of the dental prosthesis, so the damaged dental prosthesis or temporary It is not possible to remove a dental abutment from a dental implant fixture by grasping the dental abutment from which a typical dental prosthesis has been removed with a tool such as pliers. Not.

Special table 2011-514226 gazette

  In view of the above problems, the present invention is used by fixing a dental prosthesis in the oral cavity using a dental implant system and then fixing the dental prosthesis to a dental abutment fixed to the dental implant fixture. The dental prosthesis is fixed when it is necessary to remove the dental prosthesis or remove the dental abutment from which the dental prosthesis has been temporarily fixed. Easily remove a dental abutment from which the abutment or temporary dental prosthesis has been removed, especially if the dental prosthesis is a molar prosthesis It is an object to provide a jig that can be used.

  As a result of intensive research to solve the above problems, the present inventor has sealed a through hole provided in a dental prosthesis when the dental prosthesis is firmly fixed to a dental abutment. The dental cement is removed and a screwdriver is inserted into the through hole of the dental abutment through the through hole provided in the dental prosthesis to release the screw of the abutment screw with the dental implant fixture. Remove the abutment screw and, if the dental prosthesis is temporarily fixed to the dental abutment, insert a screwdriver into the through hole of the dental abutment from which the dental prosthesis was removed. Even if the abutment screw is removed from the dental implant fixture and the abutment screw is removed, the dental abutment screw If the dental abutment cannot be easily removed from the dental implant fixture, use a jig to remove the dental abutment from the dental implant fixture. A rod-shaped portion that can be inserted into a through-hole provided in the engaging portion of the dental abutment is formed, and a step portion having a diameter larger than that of the rod-shaped portion that comes into contact with the step portion of the through-hole of the dental abutment is formed. The dental abutment is located inside the oral cavity when the step abuts the step of the through hole of the dental abutment with a round bar-like portion that can be inserted into the through hole up to the step of the dental abutment. Alternatively, it is bent at a position inside the oral cavity with respect to the occlusal surface of the dental prosthesis that has been used by being fixed to the dental abutment to form a grip portion, and the step of the through hole of the dental abutment If the O-ring that abuts the inner surface of the through hole of the dental abutment is attached to a part close to the dental abutment, the dental prosthesis is firmly fixed to the dental abutment. Remove the dental cement that had blocked the through hole provided in the prosthesis, insert a screwdriver into the through hole of the dental abutment, and release the screw engagement of the abutment screw with the dental implant fixture. The dental prosthesis with the abutment screw removed is fixed to the dental abutment through the through hole provided in the dental prosthesis and into the through hole of the dental abutment. If the dental abutment is temporarily fixed, insert a screwdriver into the through hole of the dental abutment from which the dental prosthesis has been removed. Insert the screw into the through hole of the dental abutment from which the abutment screw was removed by unscrewing the attachment screw from the dental implant fixture. When the step portion of the dental abutment is brought into contact with the step portion of the through hole of the dental abutment, the O-ring is attached to the round bar shape portion following the rod-like portion and close to the through hole of the dental abutment. In this state, if the gripping part is slightly swung left and right or back and forth, it will face toward the jawbone provided inside the oral cavity of the dental implant fixture. Since the contact between the tapered conical hole and the tapered conical portion of the dental abutment is released, the circle inserted into the through hole of the dental abutment of the jig When the shape portion is moved inward of the oral cavity in the axial direction of the through hole of the dental abutment, the dental prosthesis is fixed because the dental abutment is in a state where the through hole is held by the O-ring. The present invention was completed by investigating that a dental abutment can be easily detached from a dental implant fixture.

  That is, the present invention is to contact the stepped portion in the through hole of the dental abutment following the rod-shaped portion at the tip that can be inserted into the through hole provided on the jaw bone side from the stepped portion of the through hole of the dental abutment. A round bar-shaped part with a diameter larger than that of the bar-shaped part that can be inserted into the through-hole up to the step of the dental abutment. The step abuts the step of the through-hole of the dental abutment. The inside of the oral cavity is bent at a position inside the oral cavity from the occlusal surface of the dental prosthesis that has been used by being fixed to the dental abutment or the dental abutment, and a dental part is formed. A dental abutment is mounted on a dental abutment, characterized in that an O-ring that is in contact with the inner surface of the through hole of the dental abutment is attached to a portion close to the step of the through hole of the dental abutment. Outside A jig for.

  The jig for detaching the dental abutment according to the present invention from the dental implant fixture is inserted into a through hole provided at the tip of the through hole of the dental abutment in the engaging portion on the jawbone side. A through-hole to the step of the dental abutment having a stepped portion having a diameter larger than that of the rod-shaped portion that forms a possible rod-shaped portion and abuts the step of the through-hole of the dental abutment following the rod-shaped portion Since an O-ring that is in contact with the inner surface of the through hole of the dental abutment is attached to a portion close to the step of the through hole of the dental abutment. When the dental prosthesis is firmly fixed to the dental abutment, the dental cement that has blocked the through-hole provided in the dental prosthesis is removed and the dental prosthesis is provided. Through the through-hole Insert the screwdriver into the through hole of the medical abutment to release the abutment screw from the dental implant fixture and remove the abutment screw. If the dental prosthesis is temporarily fixed to the dental abutment, insert a screwdriver into the through hole of the dental abutment from which the dental prosthesis has been removed. Insert the screw into the through hole of the dental abutment from which the abutment screw was removed by releasing the screwing with the dental implant fixture, and insert the end of the rod-shaped part into the dental hole. A dental abutment is attached to the round bar-shaped part following the bar-shaped part when it is in contact with the step of the through hole of the abutment Since the O-ring comes into contact with the inner surface of the through hole of the dental abutment at a position close to the through hole of the dental abutment, if the gripping part is slightly swung left and right or back and forth in this state, the dental implant Since the contact state between the tapered conical hole and the tapered conical portion of the dental abutment toward the jawbone provided on the inside of the oral cavity of the fixture is released, the dental abutment of the jig is released. When the round bar-like portion inserted into the through hole is moved inward of the oral cavity in the axial direction of the through hole of the dental abutment, the dental abutment is in a state where the through hole is held by the O-ring. The dental abutment can be easily removed from the dental implant fixture.

It is the front view which showed the left half of one Example of the dental implant fixture in the cross section. It is the front view which showed the left half of one Example of the dental abutment in the cross section. The dental prosthesis is firmly fixed to the dental implant fixture fixed in the jawbone shown in FIG. 1, and the cross section showing the state in which the dental abutment shown in FIG. 2 is fixed with an abutment screw It is explanatory drawing. It is a front view which shows one Example of the jig | tool for removing the dental abutment which concerns on this invention from a dental implant fixture. It is sectional explanatory drawing which shows the state which has removed the dental abutment integral with the dental prosthesis with the jig | tool which concerns on this invention from the dental implant fixture.

  Hereinafter, a jig for removing a dental abutment according to the present invention from a dental implant fixture will be described in detail with reference to the drawings.

  In the drawings, reference numeral 1 denotes a dental implant fixture which is embedded in an insertion hole drilled in a jawbone and is bone-bonded with the jawbone to become an artificial tooth root, which is provided toward the jawbone side provided inside the oral cavity. An engaging recess 1b such as a hexagonal hole is formed at the distal end of the tapered conical hole 1a and a female screw 1c into which a later-described abutment screw 3 is screwed onto the jawbone side of the engaging portion 1b. It is installed. Further, a male screw 1d for self-tapping is generally screwed on the outer periphery of the dental implant fixture 1.

  2 is provided with a prosthesis fixing part 2b on the inside of the oral cavity of the flange-like part 2a for pressing the gingival part of the jawbone, and the dental implant fixture 1 is tapered on the jawbone side opposite to the flange-like part 2a. A tapered conical portion 2c having the same taper as that of the conical hole 1a and an engaging portion 2d such as a hexagonal column that engages with the engaging concave portion 1b of the dental implant fixture 1 at the tip of the conical portion 2c. A through hole 2e is formed in the axial direction of the through hole 2e, and a step 2f on which a head 3a of an abutment screw 3 described later is provided is provided on the jawbone side of the through hole 2e. The inner diameter of the jaw bone side of the step 2f is screwed at the tip of the abutment screw 3 so that the male screw 3b screwed into the female screw 1c of the dental implant fixture 1 can pass therethrough. Dental abutment .

  Reference numeral 4 denotes a dental prosthesis fixed to a prosthesis fixing part 2b provided inside the oral cavity of the flange-shaped part 2a of the dental abutment 2, and the dental prosthesis 4 penetrates the dental abutment 2. A through hole 4a through which the head 3a of the abutment screw 3 can normally pass is provided in the extension portion of the hole 2e. When this dental prosthesis 4 is a dental prosthesis to be temporarily fixed, May not be provided with a through hole 4a through which the head 3a of the abutment screw 3 can pass.

  Reference numeral 5 denotes a jig for removing the dental abutment from the dental implant fixture according to the present invention, and the distal end is in the engaging portion 2d on the jaw bone side from the step 2f of the through hole 2e of the dental abutment 2. A rod-shaped portion 5a that can be inserted into the through-hole 2e provided is formed, and a step having a larger diameter than the rod-shaped portion 5a that abuts on the step-shaped portion 2f of the through-hole 2e of the dental abutment 2 following this rod-shaped portion 5a. The step 5b is in contact with the step 2f of the through hole 2e of the dental abutment 2 with a round bar-like portion having a thickness 5b that can be inserted into the through hole 2e up to the step 2f of the dental abutment 2. When this occurs, the inside of the oral cavity is bent at a position inside the oral cavity from the occlusal surface of the dental abutment 2 or the dental prosthesis 4 that has been used by being fixed to the dental abutment 2 to form a grasping portion 5d. And teeth in the vicinity of the step 2f of the through hole 2e of the dental abutment 2 O-ring 5c abutting the inner surface of the through hole 2e of use abutment 2 is attached. The grasping part 5d is 85 to 100 ° with respect to the rod-like part 5a at a position inside the oral cavity from the occlusal surface of the dental abutment 2 or the dental prosthesis 4 used by being fixed to the dental abutment 2. It is preferable that the dental prosthesis 4 is bent at an angle because the dental prosthesis 4 can be easily operated when it is a molar prosthesis, particularly a molar prosthesis. More preferably, it is 90 °.

  In order to remove the dental abutment from the dental implant fixture using the jig 5 according to the present invention, when the dental prosthesis 4 is firmly fixed to the dental abutment 2, First, the dental cement that has sealed the through hole 4a provided in the dental prosthesis 4 is removed, and a screwdriver (not shown) is inserted into the through hole 2e of the dental abutment 2, and the abutment screw 3 is removed. The abutment screw 3 is removed by releasing the screwing with the dental implant fixture 1. Further, when the dental prosthesis 4 is temporarily fixed to the dental abutment 2, a driver is inserted into the through hole 2e of the dental abutment 2 from which the dental prosthesis 4 has been removed. The screw 3 is released from the dental implant fixture 1 and the abutment screw 3 is removed.

  Next, when the dental prosthesis 4 is firmly fixed to the dental abutment 2, it passes through the through hole 4a provided in the dental prosthesis 4 and enters the through hole 2e of the dental abutment 2. The jig 5 is inserted from the end of the rod-shaped portion 5a at the tip, and the step 5b at the end of the rod-shaped portion 5a is brought into contact with the step of the through hole 2e of the dental abutment 2, so that the dental prosthesis 4 is a dental abutment. If it is temporarily fixed to the attachment 2, it is inserted into the through-hole 2 e of the dental abutment 2 from the side of the rod-like portion 5 a at the tip of the jig 5, and the step 5 b at the end of the rod-like portion 5 a is dental When abutting against the step of the through hole 2e of the dental abutment 2, the O-ring 5c attached to the round bar-like part following the bar-like part 5a is in contact with the inner surface of the through-hole 2e of the dental abutment 2 In this state, if the grasping part 5d is slightly swung left and right or back and forth, the dental implant Since the close contact state between the tapered conical hole 1a and the tapered conical portion 2c of the dental abutment 2 toward the jawbone provided on the inside of the oral cavity of the fixture 1 is released, the dental of the jig 5 When the round bar-like portion inserted into the through hole 2e of the dental abutment 2 is moved inward of the oral cavity 2e in the axial direction of the through hole 2e of the dental abutment 2, the dental abutment 2 opens the through hole 2e with O. Since the dental abutment 2 is held by the ring 5c, the dental abutment 2 can be easily detached from the dental implant fixture 1.

1 Dental implant fixture
1a Tapered conical hole
1b Engaging recess
1c Female thread
1d male screw 2 dental abutment
2a Flange-shaped part
2b Prosthesis fixing part
2c Tapered cone
2d engagement part
2e Through hole
2f Step 3 Abutment screw
3a head
3b Male screw 4 Dental prosthesis
4a Through hole 5 Jig according to the present invention
5a Bar
5b Step
5c O-ring
5d gripping part

Claims (1)

  A dental abutment (2) following a rod-like portion (5a) at the tip which can be inserted into the through hole provided on the jawbone side from the step (2f) of the through hole (2e) of the dental abutment (2) Through the step (2f) of the dental abutment (2) having a step (5b) larger in diameter than the rod-like portion (5a) contacting the step (2f) in the through hole (2e) When the step (5b) comes into contact with the step (2f) of the through hole (2e) of the dental abutment (2), it is a round bar-like portion that can be inserted into the hole (2e). Is bent at a position inside the oral cavity from the occlusal surface of the dental abutment (2) or the dental prosthesis (4) that has been used by being fixed to the dental abutment (2). An O-ring which is formed and abuts on the inner surface of the through hole (2e) of the dental abutment (2) at a position close to the step (2f) of the through hole (2e) of the dental abutment (2) Teeth characterized by wearing (5c) Jig for removing the use abutment from the dental implant fixture (5).

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