A combined implant superstructure for posterior teeth

Abstract

The utility model provides a kind of implant upper combined restorations suitable for posterior teeth, including personalized abutment, restoration and central screw, the personalized abutment is connected with implant below, the personalized abutment is equipped with central screw passage in middle, the central screw is connected with implant by the central screw passage, the top of the personalized abutment is connected with the restoration, the top of the personalized abutment is also equipped with a connecting groove, the lower of the restoration is equipped with boss structure, and the structure boss of the restoration is matched with the connecting groove on the top of personalized abutment.The utility model provides a kind of implant upper combined restorations suitable for posterior teeth, increases bonding strength.

Description

Technical Field

[0001] This utility model belongs to the field of dental implant restoration engineering and relates to a combination restoration for the upper part of an implant. Background Technology

[0002] With the improvement of people's living standards, dental implants have become the preferred restorative treatment for tooth loss. Dental implants consist of an implant that is inserted into the alveolar bone and a prosthesis that is exposed in the oral cavity to perform functions. The prosthesis includes an abutment with a central screw and a crown.

[0003] Currently, there are two main retention methods for dental implant crowns: screw retention and adhesive retention. Screw retention requires good implant position and orientation. If the implant site and angle are not suitable, adhesive retention is the only option. However, adhesive retention has certain requirements for the bonding area of ​​the abutment. Generally, a bonding height of at least 5mm is needed. Due to the special circumstances of posterior teeth, the crowns are usually shorter, or there may be elongation of the opposing jaw due to long-term tooth loss, resulting in limited restoration space for posterior teeth. If the bonding height of less than 5mm is not achieved, the bonding will be weak, and the restoration will easily fall out.

[0004] In response to this situation, dental prosthesis factories typically fabricate integrated abutment crowns, where the abutment and crown are one piece. These are usually made of metal, which has relatively poor aesthetics, especially in the premolar area where the metal is easily visible when the patient smiles. Furthermore, the bonding strength between the conventionally fabricated abutment and abutment tends to decrease with increased chewing frequency over long-term use, indicating room for improvement. Summary of the Invention

[0005] To overcome the shortcomings of insufficient space in existing posterior tooth restorations, which leads to poor bonding strength and easy dislodgement of restorations, this utility model provides a combination restoration with implant superstructure suitable for posterior teeth, increasing bonding strength.

[0006] The technical solution adopted by this utility model to solve its technical problem is:

[0007] A composite prosthesis for posterior teeth with implant superstructure includes a personalized abutment, a prosthesis, and a central screw. The personalized abutment is connected to the implant from below, and a central screw channel is provided in the middle of the personalized abutment. The central screw is connected to the implant through the central screw channel. The top of the personalized abutment is connected to the prosthesis, and a connecting groove is also provided on the top of the personalized abutment. A boss structure is provided on the bottom of the prosthesis, and the structural boss of the prosthesis matches the connecting groove on the top of the personalized abutment.

[0008] Furthermore, the connecting groove has a cross or cross-like structure.

[0009] Furthermore, the connecting groove is wider at the top and narrower at the bottom. This avoids an undercut structure, which would hinder the retention of the restoration.

[0010] Furthermore, the direction of the connecting groove is consistent with the direction of the central screw hole;

[0011] Preferably, the width and depth of the connecting groove are 1-3 mm.

[0012] The personalized abutment's supragingival portion also features side grooves. This side groove structure can improve axial adhesion strength and reduce the risk of restoration detachment.

[0013] Preferably, the side groove is a continuous or discontinuous groove, or multiple continuous or discontinuous grooves.

[0014] The personalized abutment's transgingival portion is located subgingivally, and its shape matches the patient's gingival cuff shape.

[0015] The personalized abutment is connected to the implant via an internal hexagonal connection structure, a Morse taper connection structure, a spline connection structure, a cam sleeve connection structure, a three-channel or three-lobe connection structure, or a six-lobe connection structure.

[0016] The edges of the restoration match the edges of the personalized abutment.

[0017] The main benefits of this invention are: it is effectively suitable for posterior teeth and increases bonding strength. Attached Figure Description

[0018] Figure 1 This is an assembly diagram for a modular prosthesis suitable for posterior teeth implants.

[0019] Figure 2 This is a schematic diagram of a personalized base station.

[0020] Figure 3 This is a schematic diagram of the restoration.

[0021] 1 is the prosthesis, 2 is the personalized abutment, 3 is the central screw, 4 is the implant, 201 is the interface between the personalized abutment and the implant, 202 is the lateral groove of the transgingival portion of the personalized abutment, 203 is the channel of the central screw, 204 is the cross or cross-shaped groove on the top of the personalized abutment, and 301 is the protrusion mechanism corresponding to the top recess of the personalized abutment and the protrusion of the prosthesis. Detailed Implementation

[0022] The present invention will now be further described with reference to the accompanying drawings.

[0023] Reference Figures 1-3A composite implant restoration suitable for posterior teeth, comprising a personalized abutment 2, a restoration 1, and a central screw 3.

[0024] The personalized base 2 is connected to the implant 4 below. Different connection structures are selected according to the different structures of the interface 201 between the personalized base and the implant, such as internal hexagonal connection structure, Morse taper connection structure, spline connection structure, cam sleeve connection structure, three-channel or three-lobe connection structure or six-lobe connection structure, etc.

[0025] The personalized abutment 2 has a transgingival portion located below the gum line, and its shape matches the shape of the patient's gingival cuff.

[0026] The personalized base 2 is provided with a central screw channel 203 in the middle;

[0027] The personalized base 2 has a groove with a cross or cross-shaped structure on its top. The width and depth of the groove are about 1-3mm, which can be adjusted appropriately according to the size of the personalized base 2.

[0028] The direction of the top groove of the personalized base 2 is consistent with the direction of the central screw channel 203;

[0029] The personalized base 2 has a groove at the top that is larger at the top and smaller at the bottom, which avoids the presence of an undercut structure that would be detrimental to the fixation of the restoration.

[0030] The personalized abutment 2 also has a side groove 202 on the side of the supragingival portion. The groove structure can improve the axial bonding strength and reduce the risk of restoration dislodgement. The side groove 202 of the supragingival portion of the personalized abutment can be designed by software or obtained by grinding the abutment later.

[0031] The side groove 202 of the supragingival portion of the personalized abutment can be a continuous or discontinuous groove, or multiple continuous or discontinuous grooves, depending on the height of the supragingival portion of the abutment.

[0032] The central screw 3 is connected to the implant 4 through the central screw channel 203 of the personalized base;

[0033] The upper part of the restoration 1 has a normal crown shape, forming a normal occlusal relationship with the opposing tooth;

[0034] The restoration has a cross or cross-like boss structure on its lower part, which matches the groove of the cross or cross-like structure on the upper part of the personalized base. This not only provides mechanical retention force, but also increases the bonding area and improves the bonding strength.

[0035] The edge of the restoration 1 matches the edge of the personalized abutment.

[0036] The embodiments described in this specification are merely examples of implementations of the inventive concept and are for illustrative purposes only. The scope of protection of this utility model should not be considered limited to the specific forms described in these embodiments; rather, it extends to equivalent technical means that can be conceived by those skilled in the art based on the inventive concept.

Claims

1. A composite prosthesis for implants suitable for posterior teeth, characterized in that, The implant-supported modular prosthesis includes a personalized abutment, a prosthesis, and a central screw. The personalized abutment is connected to the implant from below, and a central screw channel is provided in the middle of the personalized abutment. The central screw is connected to the implant through the central screw channel. The top of the personalized abutment is connected to the prosthesis, and a connecting groove is also provided on the top of the personalized abutment. A boss structure is provided on the bottom of the prosthesis, and the structural boss of the prosthesis matches the connecting groove on the top of the personalized abutment.

2. The implant-superstructure composite restoration suitable for posterior teeth as described in claim 1, characterized in that, The connecting groove has a cross or cross-like structure.

3. The implant-superstructure composite restoration suitable for posterior teeth as described in claim 1, characterized in that, The connecting groove is wider at the top and narrower at the bottom.

4. The implant-superstructure combination restoration suitable for posterior teeth as described in claim 1, characterized in that, The direction of the connecting groove is consistent with the direction of the central screw hole.

5. A composite implant-superstructure restoration suitable for posterior teeth as described in claim 1, characterized in that, The width and depth of the connecting groove are 1-3 mm.

6. A composite implant-superstructure restoration suitable for posterior teeth as described in any one of claims 1 to 5, characterized in that, The personalized abutment supragingival portion also has a side groove.

7. A composite implant-superstructure restoration suitable for posterior teeth as described in claim 6, characterized in that, The side groove is a continuous or discontinuous groove, or multiple continuous or discontinuous grooves.

8. A composite implant-superstructure restoration suitable for posterior teeth as described in claim 6, characterized in that, The personalized abutment's transgingival portion is located subgingivally, and its shape matches the patient's gingival cuff shape.

9. A composite implant-superstructure restoration suitable for posterior teeth as described in any one of claims 1 to 5, characterized in that, The personalized abutment is connected to the implant via an internal hexagonal connection structure, a Morse taper connection structure, a spline connection structure, a cam sleeve connection structure, a three-channel or three-lobe connection structure, or a six-lobe connection structure.

10. A composite implant-superstructure restoration suitable for posterior teeth as described in any one of claims 1 to 5, characterized in that, The edges of the restoration match the edges of the personalized abutment.

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