Local coating jig of abutment screw for oral implantation

Abstract

A local coating jig of an abutment screw for oral implantation comprises a main body, a multi-stage screw rod and a limiting nut. The abutment screw comprises a rod part with a transition conical surface and a head part with a first threaded blind hole. The main body is provided with a second threaded blind hole with an upward opening. The multi-stage screw has an upper threaded rod portion, a middle threaded rod portion, and a lower threaded rod portion. The upper threaded rod part is used for being in threaded connection with a first threaded blind hole in the head of the abutment screw, and the lower threaded rod part is in threaded connection with a second threaded blind hole of the body. The limiting nut is provided with a central through hole, an inner threaded hole in threaded connection with the middle threaded rod portion of the multi-stage screw is formed in the lower portion of the central through hole, and a sealing conical surface consistent with the transition conical surface of the rod portion of the abutment screw in shape is formed in the upper portion of the central through hole. And the minimum inner diameter of the sealing conical surface is equal to the maximum outer diameter of the transition conical surface. The coating jig disclosed by the utility model can quickly and flexibly realize effective protection of local parts such as heads of various abutment screws.

Description

TECHNICAL FIELD

[0001] The utility model relates to a coating jig, in particular to a local coating jig for abutment screw of oral implant. BACKGROUND

[0002] In dental implant surgery, abutment screw is used to fix abutment and implant together and ensure the stability of the restoration in the process of occlusion.

[0003] As Figure 1 The schematic diagram of a commonly used abutment screw, which includes a cylindrical head 2 with a first threaded blind hole 3 and a rod part with a transition taper surface 1. The rod part needs to be applied with DLC coating, amorphous carbon film, which has extremely high hardness, good wear resistance, excellent chemical inertness, low dielectric constant, wide optical band gap and good biocompatibility. In the process of applying DLC coating, it is expected to avoid the head 2, so that it still has a smooth outer surface. SUMMARY

[0004] The utility model discloses a local coating jig for abutment screw of oral implant, which can effectively protect the local area of the abutment screw, such as the head, during the coating process.

[0005] The local coating jig for abutment screw of oral implant according to the utility model comprises:

[0006] A main body with a second threaded blind hole opening upward;

[0007] A multi-stage screw rod with an upper threaded rod part, a middle threaded rod part and a lower threaded rod part, wherein the upper threaded rod part is used to form a threaded connection with the first threaded blind hole of the head of the abutment screw, and the lower threaded rod part is threaded connected with the second threaded blind hole of the main body; and

[0008] A limiting nut with a central through hole, wherein the lower part of the central through hole forms an internal threaded hole threaded connected with the middle threaded rod part of the multi-stage screw rod, and the upper part of the central through hole forms a sealing taper surface consistent with the shape of the transition taper surface of the rod part of the abutment screw, wherein the minimum inner diameter of the sealing taper surface is equal to the maximum outer diameter of the transition taper surface.

[0009] According to the local coating jig for abutment screw of oral implant, the multi-stage screw rod can have the maximum outer diameter at the middle threaded rod part.

[0010] According to the local coating jig for abutment screw of oral implant, the main body can include an upper platform and a lower fixed shaft, and the multi-stage screw rod can be provided with an inverted annular shoulder between the middle threaded rod part and the lower threaded rod part, which abuts against the upper platform of the main body.

[0011] According to the partial coating jig of the abutment screw for oral implantation of the present invention, the main body, the multi-stage screw and the limiting nut are preferably all made of a metal material in one piece.

[0012] The utility model has at least the following advantages:

[0013] The coating jig can be quickly disassembled and assembled by forming a threaded connection between the first threaded blind hole of the base screw head and the upper threaded rod of the multi-stage screw, and a threaded connection between the internal threaded hole of the limit nut and the middle threaded rod of the multi-stage screw.

[0014] During the above-mentioned threaded connection process, the transition conical surface of the abutment screw shank and the sealing conical surface of the limit nut can be simultaneously matched and abutted, thereby simply and effectively preventing the head of the abutment screw from being coated.

[0015] Due to the detachable fixing method of the multi-stage screw and the main body, coating of products of different specifications can be achieved by simply replacing the multi-stage screw and the limit nut. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of a commonly used abutment screw;

[0017] Figure 2 This is a schematic diagram of a partial assembly structure of a coating jig according to the present invention;

[0018] Figure 3 Schematic diagram of the structure of the limiting nut of the coating fixture according to the present invention;

[0019] Figure 4 It is a structural schematic diagram of the main body of the coating jig according to the utility model;

[0020] Figure 5 is a schematic structural diagram of a multi-stage screw of a coating jig according to the present invention; and

[0021] Figure 6 for Figure 1 The schematic diagram shown is a diagram of a base screw combined with a coating fixture according to the present invention for use in a DLC coating furnace. DETAILED DESCRIPTION

[0022] The present invention is described in further detail below with reference to the accompanying drawings.

[0023] Figure 2 This is a schematic diagram of a partial assembly structure of a coating jig according to the present invention. Figure 3 This is a schematic structural diagram of the limiting nut of the coating fixture according to the present invention. Figure 4This is a schematic structural diagram of the main body of the coating jig according to the present invention. Figure 5 Schematic diagram of the structure of the multi-stage screw of the coating fixture according to the present invention. Figure 2 and Figure 3 As shown, the coating jig of the present invention generally includes a main body 4, a multi-stage screw 5 and a limiting nut 6, all of which can be made of a high-temperature resistant metal material.

[0024] like Figure 2 and Figure 4 As shown, the main body 4 has a stepped shaft outer profile, including an upper platform 9 and a lower fixed shaft 7. The lower fixed shaft 7 can be fixed on the hanger of the coating equipment to achieve precise positioning. The main body 4 also has a second threaded blind hole 8 with an upward opening.

[0025] like Figure 2 and Figure 5 As shown, the multi-stage screw 5 has an upper threaded shank 13, an intermediate threaded shank 12 and a lower threaded shank 10, and has a maximum outer diameter at the intermediate threaded shank 12. The multi-stage screw 5 is formed with an inverted annular shoulder 11 between the intermediate threaded shank 12 and the lower threaded shank 10. Figure 2 In the embodiment, the lower threaded shank 10 is threadedly connected to the second threaded blind hole 8 of the main body 4 until the inverted annular boss 11 abuts the upper platform 9 of the main body 4. The upper threaded shank 13 is used to form a threaded connection with the first threaded blind hole 3 of the head 2 of the abutment screw, such as Figure 6 shown.

[0026] like Figure 3 As shown, the limiting nut 6 has a longitudinal central through hole, the lower portion of which forms an internal threaded hole 15, and the upper portion forms a sealing cone 16. The sealing cone 16 is substantially identical in shape to the transition cone 1 of the base screw shank, and the minimum inner diameter of the sealing cone 16 is substantially equal to the maximum outer diameter of the transition cone 1. The internal threaded hole 15 is threadedly connected to the middle threaded shank 12 of the multi-stage screw 5, as shown in FIG. Figure 6 The bottom surface or lower surface 14 of the limiting nut 6 may not abut against the upper platform 9 of the main body 4 .

[0027] Figure 6 for Figure 1 The schematic diagram of the base screw and the coating fixture according to the present invention are used in a DLC coating furnace. Figure 2 and Figure 6 As shown, first screw the lower threaded rod 10 of the multi-stage screw 5 into the second threaded blind hole 8 of the main body 4 until the inverted annular shoulder 11 abuts against the upper platform 9 of the main body 4. Then invert Figure 1The abutment screw shown is threadedly connected between the first threaded blind hole 3 of the head 2 and the upper threaded rod 13 of the multi-stage screw 5 until it can no longer be screwed in. Next, the limiting nut 6 is passed over the abutment screw, so that the internal threaded hole 15 is threadedly connected to the intermediate threaded rod 12 of the multi-stage screw 5 until the sealing cone 16 of the limiting nut 6 abuts the transition cone 1 of the abutment screw rod. In this way, through the coating jig of the present invention, during the process of applying the DLC coating to the abutment screw rod, the cylindrical head 2 with its smooth outer surface is effectively isolated from the DLC coating gas.

Claims

1. A local coating fixture for an abutment screw for oral implantation, wherein the abutment screw comprises a shank having a transition cone surface and a head having a first threaded blind hole, characterized in that: The local coating jig of the abutment screw for oral implantation comprises: The main body is provided with a second threaded blind hole opening upward; a multi-stage screw having an upper threaded shank, an intermediate threaded shank, and a lower threaded shank, wherein the upper threaded shank is threadedly connected to the first threaded blind hole of the head of the abutment screw, and the lower threaded shank is threadedly connected to the second threaded blind hole of the body; and The limit nut has a central through hole, an internal threaded hole threadedly connected to the middle threaded rod of the multi-stage screw is formed at the lower part of the central through hole, and a sealing cone surface with the same shape as the transition cone surface of the rod of the base screw is formed at the upper part of the central through hole, wherein the minimum inner diameter of the sealing cone surface is equal to the maximum outer diameter of the transition cone surface.

2. The local coating jig for an abutment screw for oral implantation according to claim 1, characterized in that: A multi-stage screw has a maximum outer diameter at the intermediate threaded shank.

3. The local coating jig for an abutment screw for oral implantation according to claim 1, characterized in that: The main body comprises an upper platform and a lower fixed shaft. The multi-stage screw is provided with an inverted annular boss between the middle threaded rod and the lower threaded rod, which is in contact with the upper platform of the main body.

4. The local coating jig for an abutment screw for oral implantation according to claim 1, characterized in that: The main body, the multi-stage screw and the limit nut are all made of metal material in one piece.

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