Implant single-sleeve crown repairing device

Abstract

The utility model discloses an implant single-sleeve crown repairing device, and belongs to the technical field of implant denture repairing. The device comprises a composite abutment and a sleeve outer crown, the composite abutment comprises a boss inner crown composed of an upper circular truncated cone section and a lower retention section which are connected up and down, and the sleeve outer crown is sleeved on the boss inner crown and is in retention connection with the boss inner crown through Morse taper. The device is mainly composed of the sleeve outer crown and the boss inner crown, the number of accessories is small, the structure is simple, the technical sensitivity to doctors is reduced, a common insertion path can be easily obtained, time and labor are saved during operation, and therefore the clinical process is accelerated, time is saved, accuracy is improved, and missing teeth of a patient can be simply and rapidly repaired. The sleeve outer crown and the boss inner crown are fixedly connected through the Morse taper, the retention effect is good, the retention force is sufficient, and the sleeve can be taken down by a patient only with force when the sleeve needs to be taken down, so that oral hygiene and cleaning of the patient are facilitated, periodontal health is protected, and the long-term success effect is achieved.

Description

Technical Field

[0001] This utility model belongs to the field of dental implant technology, specifically a single-tube crown restoration device for implants. Background Technology

[0002] Dental implants involve inserting an implant (artificial tooth root) into the alveolar bone in the area of ​​the missing tooth. After the implant takes hold, a prosthesis is then fabricated on top of it to complete the restoration of the implant prosthesis.

[0003] Current implant-supported prostheses generally have the following problems: 1) Existing prostheses have complex structures and numerous components, requiring a high level of skill and mastery of the common insertion path from the dentist, making the procedure time-consuming and labor-intensive; 2) The crown structure of existing prostheses lacks sufficient occlusal strength, easily leading to early loosening and loss, resulting in a higher risk of implant failure; 3) Existing prostheses require special tools for removal and are generally cleaned every six months. Food easily gets trapped around the implant at the crown ridge, but patients cannot remove the prosthesis themselves, which is detrimental to oral health maintenance. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art and to provide a single-tube crown repair device for implants.

[0005] This utility model is achieved through the following technical solution:

[0006] Option 1

[0007] A single-tube crown implant restoration device includes a composite abutment and a sleeve outer crown.

[0008] The composite abutment includes an implant connecting rod, with a retaining plate at the top of the implant connecting rod. A boss inner crown is fixed on the retaining plate, and the boss inner crown consists of an upper frustum section and a lower fixation section that are connected vertically.

[0009] The outer sleeve crown is fitted onto the inner boss crown. The top of the outer sleeve crown is closed and the bottom is open. The outer sleeve crown has a frustum-shaped structure. The shape of the inner cavity of the outer sleeve crown is consistent with the shape of the inner boss crown. The outer sleeve crown is fitted onto the inner boss crown through its inner cavity. The outer sleeve crown and the inner boss crown are fixedly connected by a Morse taper.

[0010] Furthermore, in the inner crown of the boss, the taper of the upper frustum section is 20°, and the height of the upper frustum section is 2mm; the taper of the lower retention section is 1°, 2°, 3°, 4°, 4.5°, and 5.1°, and the height of the lower retention section is 1mm, 4mm, and 6mm; the wall thickness of the outer crown of the sleeve is 1mm, and the height of the outer crown of the sleeve is 4mm, 6mm, 10mm, and 12mm; several rings of fixing grooves are evenly distributed on the outer surface of the outer crown of the sleeve.

[0011] Furthermore, the taper of the lower retention section is 4°, and the height of the lower retention section is 1 mm.

[0012] Furthermore, the angle between the axis of the inner crown of the boss and the vertical direction is 0°, 7.5°, 15°, 25°, 35°, and 45°.

[0013] Option 2

[0014] A single-tube crown implant restoration device includes a composite abutment, a sleeve crown, and retention screws.

[0015] The composite abutment includes an implant connecting rod, with a retaining plate at the top of the implant connecting rod. A boss inner crown is fixed on the retaining plate. A downward-extending threaded blind hole is opened at the center of the top surface of the boss inner crown. The boss inner crown consists of an upper frustum section and a lower retention section that are connected vertically.

[0016] The outer sleeve crown is fitted onto the inner boss crown. The outer sleeve crown has a frustum-shaped structure. A fixing hole is provided on the outer sleeve crown along its axis, extending from its top to its bottom. The shape of the bottom opening of the fixing hole is consistent with the shape of the inner boss crown. The outer sleeve crown is fitted and secured onto the inner boss crown through its bottom opening. The outer sleeve crown and the inner boss crown are connected by a Morse taper for fixation.

[0017] The retaining screw is inserted through the top hole of the fixing hole of the outer sleeve crown and threaded into the threaded blind hole on the inner crown of the boss. The outer sleeve crown and the inner crown of the boss are fixedly connected by the retaining screw.

[0018] Furthermore, in the inner crown of the boss, the taper of the upper frustum section is 20°, and the height of the upper frustum section is 2mm; the taper of the lower retention section is 1°, 2°, 3°, 4°, 4.5°, and 5.1°, and the height of the lower retention section is 1mm, 4mm, and 6mm; the wall thickness of the outer crown of the sleeve is 1mm, and the height of the outer crown of the sleeve is 4mm, 6mm, 10mm, and 12mm; several rings of fixing grooves are evenly distributed on the outer surface of the outer crown of the sleeve.

[0019] Furthermore, the taper of the lower retention section is 4°, and the height of the lower retention section is 1 mm.

[0020] Furthermore, the angle between the axis of the inner crown of the boss and the vertical direction is 0°, 7.5°, 15°, 25°, 35°, and 45°.

[0021] Furthermore, after the outer sleeve crown and the inner boss crown are fixedly connected by a retaining screw, the top of the retaining screw is lower than the top opening of the fixing hole.

[0022] Furthermore, the upper half of the outer surface of the sleeve crown is designed with a smooth finish, while the lower half of the outer surface is evenly provided with several rings of fixing grooves.

[0023] Both of the above solutions provide a single-tube crown restoration device for implants. The structures of the two devices are basically the same, with the only difference being the presence or absence of retaining screws.

[0024] The implant-supported single-tube crown restoration device in Option 1 features a retention taper (lower retention section) directly ground on the inner crown of the boss. Tapers of 1°, 2°, 3°, 4°, 4.5°, and 5.1° are available. The inner cavity of the outer crown has the same taper as the inner crown. The outer crown is fitted onto the inner crown and tapped into place, forming a taper-locked connection. The more force applied, the tighter the lock becomes. Ultimately, the outer crown and the inner crown are connected by a Mohs taper for effective and sufficient retention. Removal of the outer crown is simple, requiring only force, making it easy for patients to insert and remove themselves. Clinical trials have shown that a 4° retention taper and a 1mm retention height in the lower retention section provide optimal results, facilitating insertion and removal while maintaining good retention, thus fully meeting clinical needs.

[0025] Option 2, a single-tube crown implant restoration, builds upon Option 1 by adding a retention screw for further fixation. This creates a dual-retention system: tapered retention between the inner and outer crowns, plus screw-based retention between them. This allows for early rigid connection and passive positioning during implantation, enabling all teeth to share occlusal forces. Osseointegration occurs around three months, and the crowns remain stable for 1-7 months, ensuring implant stability and success. Later, the retention screw can be removed, allowing patients to easily remove and reinsert the implant themselves. This facilitates good oral hygiene, cleaning plaque and food debris around the prosthesis and implant, preventing peri-implantitis caused by impaction and subsequent implant failure, and also avoiding bad breath. Even after removing the retention screw, the retention between the inner and outer crowns remains sufficient for chewing function without dislodgement, fully meeting clinical needs. More specifically, in the case of immediate implantation and restoration, intraoral welding (the smooth surface of the outer crown of the sleeve is the welding point), and immediate load-bearing, in addition to the tight Morse taper connection between the outer crown and the inner crown of the boss, a retaining screw that can be freely screwed on and removed is added between the outer crown and the inner crown of the boss. Applying a force of 25N ensures a tight connection between the outer crown and the inner crown of the boss, preventing them from loosening. This ensures that the restored denture will not fall out for 1-7 months or even longer, thus guaranteeing osseointegration and implant success. The retaining screw can be removed when necessary, allowing the patient to remove and insert the denture independently. Even without the retaining screw, the existing Morse taper connection between the outer crown and the inner crown of the boss provides sufficient retention, allowing the patient to easily clean and maintain the prosthesis, thereby preventing peri-implantitis.

[0026] In the two implant single-tube crown restoration devices mentioned above, the inner crown of the protrusion can be designed with different deflection angles, including inner crowns with deflection angles of 0°, 7.5°, 15°, 25°, 35°, and 45°. This allows for easy adjustment of the common placement path between implants by using inner crowns with different deflection angles in combination.

[0027] This utility model device is scientifically designed, structurally sound, simple to operate, and easy to use. It mainly consists of a sleeve-shaped outer crown and a boss-shaped inner crown, with fewer accessories and a simpler structure. This reduces the need for highly skilled dentists, allows for easy attainment of a common insertion path, and saves time and effort during operation, thus accelerating the clinical process, conserving time, and improving accuracy. It can simply and quickly restore missing teeth. The sleeve-shaped outer crown and the boss-shaped inner crown are connected by a Mohs taper for retention, providing excellent retention and sufficient retention force. When removal is needed, the patient can easily remove it themselves with minimal effort, facilitating oral hygiene, protecting periodontal health, and achieving long-term successful results. Attached Figure Description

[0028] Figure 1 The diagram shows the external structure of the device of this utility model as shown in Embodiment 1 and Embodiment 2 (the device with two sleeve crowns of different lengths).

[0029] Figure 2 This is a cross-sectional view of the device of the present invention shown in Embodiment 1 (a device with two sleeve crowns of different lengths).

[0030] Figure 3 This is a schematic diagram of the exploded appearance structure of the device of this utility model shown in Embodiment 1 (the device with two sleeve crowns of different lengths).

[0031] Figure 4 This is an exploded cross-sectional view of the device of the present invention shown in Embodiment 1 (the device with two sleeve crowns of different lengths).

[0032] Figure 5 The diagram shows the external structure of the device of this utility model with a deflection angle for the inner crown of the boss as shown in Embodiments 1 and 2 (device with two sleeve outer crowns of different lengths).

[0033] Figure 6 This is a cross-sectional view of the device of this invention with a deflection angle for the inner crown of the boss as shown in Example 1 (the device has two sleeve outer crowns of different lengths).

[0034] Figure 7 This is a cross-sectional structural diagram of the device of the present invention shown in Embodiment 2 (a device with two sleeve outer crowns of different lengths).

[0035] Figure 8This is a schematic diagram of the exploded appearance structure of the device of this utility model shown in Embodiment 2 (the device with two sleeve crowns of different lengths).

[0036] Figure 9 This is an exploded cross-sectional view of the device of the present invention shown in Embodiment 2 (the device with two sleeve crowns of different lengths).

[0037] Figure 10 This is a cross-sectional view of the device of this invention with a deflection angle for the inner crown of the boss as shown in Example 2 (the device has two sleeve outer crowns of different lengths).

[0038] In the diagram: 1-outer sleeve crown, 2-implant connecting rod, 3-clipping platform, 4-inner crown with protrusion, 5-upper frustum section, 6-lower fixation section, 7-fixation screw. Detailed Implementation

[0039] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0040] In the description of this embodiment, it should be noted that the terms "upper", "lower", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Example 1

[0041] This embodiment provides a single-tube crown implant restoration device, including a composite abutment and a sleeve outer crown 1.

[0042] The composite abutment includes an implant connecting rod 2, with a retaining plate 3 at the top of the implant connecting rod 2. A bossed inner crown 4 is fixed on the retaining plate 3. The bossed inner crown 4 consists of an upper frustum section 5 and a lower retention section 6 connected vertically. The upper frustum section 5 has a taper of 20° and a height of 2mm. The lower retention section 6 has tapers of 1°, 2°, 3°, 4°, 4.5°, and 5.1°, and heights of 1mm, 4mm, and 6mm. The lower retention section 6 has the best performance when the taper is 4° and the height is 1mm, making it easy to insert and remove, and providing good retention.

[0043] The outer sleeve crown 1 is fitted onto the inner crown 4 of the boss. The top of the outer sleeve crown 1 is closed and the bottom is open. The outer sleeve crown 1 has a frustum-shaped structure. The shape of the inner cavity of the outer sleeve crown 1 is consistent with the shape of the inner crown 4 of the boss. The outer sleeve crown 1 is fitted onto the inner crown 4 of the boss through its inner cavity. The outer sleeve crown 1 and the inner crown 4 of the boss are fixedly connected by a Morse taper. The wall thickness of the inner cavity of the outer sleeve crown 1 is 1mm. The height of the outer sleeve crown 1 is 4mm, 6mm, 10mm and 12mm. The appropriate height of the outer sleeve crown 1 can be selected according to actual needs. Several fixing grooves are evenly distributed from top to bottom on the outer surface of the outer sleeve crown 1.

[0044] In this embodiment, the inner crown 4 of the protrusion can be designed with different deflection angles. Specifically, the deflection angles are 0°, 7.5°, 15°, 25°, 35°, and 45°, meaning the angle α between the axis of the inner crown 4 and the vertical direction is 0°, 7.5°, 15°, 25°, 35°, and 45°. The repair devices with the above six different deflection angles of the inner crown 4 can be used in combination to easily adjust the common placement path between implants. Example 2

[0045] This embodiment provides a single-sleeve crown implant restoration device, including a composite abutment, a sleeve outer crown 1, and a retention screw 7.

[0046] The composite abutment includes an implant connecting rod 2, with a retaining platform 3 at the top of the implant connecting rod 2. A boss inner crown 4 is fixed on the retaining platform 3. A downward-extending threaded blind hole is opened at the center of the top surface of the boss inner crown 4. The boss inner crown 4 consists of an upper frustum section 5 and a lower retention section 6 connected vertically. The taper of the upper frustum section 5 is 20°, and the height of the upper frustum section 5 is 2mm. The taper of the lower retention section 6 is 1°, 2°, 3°, 4°, 4.5°, and 5.1°, and the height of the lower retention section 6 is 1mm, 4mm, and 6mm. Among them, the lower retention section 6 has the best performance when the taper is 4° and the height is 1mm, which is easy to insert and remove and has good retention.

[0047] The outer sleeve crown 1 is fitted onto the inner crown 4 of the boss. The outer sleeve crown 1 has a frustum-shaped structure. A fixing hole is provided on the outer sleeve crown 1 along its axis, extending from its top to its bottom. The shape of the bottom opening of the fixing hole is consistent with the shape of the inner crown 4 of the boss. The outer sleeve crown 1 is fitted and secured onto the inner crown 4 of the boss through its bottom opening. The outer sleeve crown 1 and the inner crown 4 of the boss are fixedly connected by a Morse taper. The wall thickness at the bottom opening of the outer sleeve crown 1 is 1 mm. The height of the outer sleeve crown 1 is available in 4 mm, 6 mm, 10 mm, and 12 mm. An appropriate height of the outer sleeve crown 1 can be selected according to actual needs. Several rings of fixing grooves are provided on the outer surface of the outer sleeve crown 1.

[0048] The retaining screw 7 is inserted through the top hole of the fixing hole of the outer crown 1 of the sleeve and is threadedly connected to the threaded blind hole on the inner crown 4 of the boss. The inner crown sleeve and the base are fixedly connected by the retaining screw 7.

[0049] In this embodiment, after the outer sleeve crown 1 and the inner boss crown 4 are fixedly connected by the retaining screw 7, for the shorter outer sleeve crown 1 (e.g., with a height of 4mm or 6mm), the top end of the retaining screw 7 is flush with the top end of the fixing hole on the outer sleeve crown 1. Figure 7 As shown in the left side of the middle, the short sleeve outer crown 1; for sleeve outer crowns 1 with a longer length (such as 10mm or 12mm in height), the top of the retaining screw 7 is lower than the top opening of the fixing hole on the sleeve outer crown 1, forming a blind hole section, such as... Figure 7 The long sleeve outer crown 1 is shown on the right side. The retention screw 7 ensures a more secure connection between the sleeve outer crown 1 and the inner crown 4 of the boss, preventing early loosening or even dislodgement of the prosthesis. This ensures the prosthesis remains in place for 1-7 months or even longer, guaranteeing osseointegration for immediate implantation and restoration, ultimately leading to successful implantation. After successful implantation, the retention force between the sleeve outer crown 1 and the inner crown 4 is sufficient, allowing the retention screw to be removed. This enables the patient to easily remove and insert the prosthesis at any time for oral hygiene, maintaining oral health and achieving long-term use. For the long sleeve outer crown 1, a short retention screw 7 is used for fixation, creating a blind hole segment in the fixation hole. This design allows for adaptive grinding of the sleeve outer crown 1 based on the bite during occlusal correction. The blind hole segment on the sleeve outer crown 1 provides sufficient space for this grinding process.

[0050] In this embodiment, for the longer (e.g., 10mm or 12mm in height) sleeve outer crown 1, the upper half of the outer surface is designed with a smooth finish, and the lower half of the outer surface is evenly provided with several rings of fixing grooves, such as... Figure 8 The long sleeve outer crown 1 on the right side is shown; the smooth design part of the outer surface of the sleeve outer crown 1 is used for intraoral welding, that is, as the welding position for intraoral welding, welding the implants together to form a rigid connection, and finally making the implants passively positioned.

[0051] In this embodiment, the inner crown 4 of the protrusion can be designed with different deflection angles, specifically 0°, 7.5°, 15°, 25°, 35°, and 45°. That is, the angle β between the axis of the inner crown 4 and the vertical direction is 0°, 7.5°, 15°, 25°, 35°, and 45°. The above six different deflection angle inner crown 4 restoration devices, when used in combination, can easily adjust to create a common placement path between implants. Example 3

[0052] For the single-tube crown implant restoration device disclosed in Examples 1 and 2, taking the taper of the lower fixation section 6 of the inner crown 4 of the boss as 4° as an example, the specific explanation of determining the common placement path between implants is as follows:

[0053] The taper of the lower fixation section 6 of the inner crown 4 of the implant is 4°, and the two sides are 8°. The common positioning path between the two implants is between 8*2=16°, which can tightly lock the inner crown 4 of the implant and the outer crown 1 of the sleeve, ensuring close positioning. The angles of the inner crown 4 of the implant are designed to be 0°, 7.5°, 15°, 25°, 35°, and 45°. With the addition of the 8° common positioning path on both sides, the common positioning path between the implants can be easily adjusted.

[0054] A. If the tilt angle of the two implants is 7.5°, then use two 7.5° inner crowns 4. The positioning angle can be adjusted to 8°+8°+7.5°+7.5°=31°. The two implants can obtain a good common positioning path within 31°, and the inner and outer crowns can be easily and closely positioned to achieve a good fixation effect.

[0055] B. If the tilt angle of the two implants is 15°, then using two 15° inner crowns with raised platforms 4, the positioning angle can be adjusted to 8°+8°+15°+15°=46°. Then, the two implants can find a good common positioning path within 46°, and the inner and outer crowns can be easily and closely positioned to achieve a good fixation effect.

[0056] C. If the tilt angle of the two implants is 25°, then using two 25° inner crowns with raised platforms 4, the positioning angle can be adjusted to 8°+8°+25°+25°=66°. Then, the two implants can find a good common positioning path within 66°, and the inner and outer crowns can be easily and closely positioned to achieve a good fixation effect.

[0057] D. If the tilt angle of the two implants is 35°, then using two 35° inner crowns with raised platforms 4, the positioning angle can be adjusted to 8°+8°+35°+35°=86°. Then, the two implants can find a good common positioning path within 86°, and the inner and outer crowns can be easily and closely positioned to achieve a good fixation effect.

[0058] E. If the tilt angle of the two implants is 45°, then using two 45° inner crowns with raised platforms 4, the positioning angle can be adjusted to 8°+8°+45°+45°=106°. Then, the two implants can find a good common positioning path within 106°, and the inner and outer crowns can be easily and closely positioned to achieve a good fixation effect.

[0059] The above design greatly facilitates clinicians in quickly adjusting to a common placement path when implantation paths differ. It also ensures that the immediate prosthesis restoration remains secure between the inner crown 4 of the immediate implant boss and the outer crown 1 of the sleeve, achieving the goal of rapid prosthesis restoration and reducing failures.

[0060] In addition to the angle combinations described in Example 3, there are other different combinations, such as: 7.5°+15°, 7.5°+25°, 7.5°+35°, 7.5°+45°, 15°+15°, 15°+25°, 15°+35°, 15°+45°, 25°+25°, 25°+35°, 25°+45°, 35°+35°, 35°+45°, 45°+45°, etc. These combinations can easily achieve a common placement path in clinical settings, meeting the needs of clinicians. The doctor's control is greatly improved, the sensitivity of technical requirements is reduced, and it is easy to repair and replace. Moreover, it can effectively perform oral hygiene cleaning, protect periodontal health, and achieve long-term successful results.

[0061] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An implant single sleeve crown restoration device, characterized in that: Includes a composite abutment and a sleeve cap; The composite abutment includes an implant connecting rod, the top of which is equipped with a retaining platform. A boss inner crown is fixed on the retaining platform. The boss inner crown consists of an upper frustum section and a lower fixation section that are connected vertically. The outer sleeve crown is fitted onto the inner boss crown. The top of the outer sleeve crown is closed and the bottom is open. The outer sleeve crown has a frustum-shaped structure. The shape of the inner cavity of the outer sleeve crown is consistent with the shape of the inner boss crown. The outer sleeve crown is fitted onto the inner boss crown through its inner cavity. The outer sleeve crown and the inner boss crown are fixedly connected by a Morse taper.

2. Implant single sleeve crown restoration device according to claim 1, characterized in that: In the inner crown of the boss, the taper of the upper frustum section is 20°, and the height of the upper frustum section is 2mm; the taper of the lower retention section is 1°, 2°, 3°, 4°, 4.5°, and 5.1°, and the height of the lower retention section is 1mm, 4mm, and 6mm; the wall thickness of the outer crown of the sleeve is 1mm, and the height of the outer crown of the sleeve is 4mm, 6mm, 10mm, and 12mm; several rings of fixing grooves are evenly distributed on the outer surface of the outer crown of the sleeve.

3. Implant single sleeve crown restoration device according to claim 2, characterized in that: The taper of the lower retention section is 4°, and the height of the lower retention section is 1 mm.

4. The implant single sleeve crown restoration device according to claim 1, characterized in that: The angle between the axis of the inner crown of the boss and the vertical direction is 0°, 7.5°, 15°, 25°, 35°, and 45°.

5. An implant single sleeve crown restoration device, characterized by: Includes composite base, sleeve cap and retaining screw; The composite abutment includes an implant connecting rod, the top of which is equipped with a retaining platform. A boss inner crown is fixed on the retaining platform. A downward-extending threaded blind hole is opened at the center of the top surface of the boss inner crown. The boss inner crown consists of an upper frustum section and a lower retention section that are connected vertically. The outer sleeve crown is fitted onto the inner boss crown. The outer sleeve crown has a frustum-shaped structure. A fixing hole is provided on the outer sleeve crown along its axis, extending from its top to its bottom. The shape of the bottom opening of the fixing hole is consistent with the shape of the inner boss crown. The outer sleeve crown is fitted onto the inner boss crown through its bottom opening. The outer sleeve crown and the inner boss crown are fixedly connected by a Morse taper. The retaining screw is inserted through the top hole of the fixing hole of the outer sleeve crown and threaded into the threaded blind hole on the inner crown of the boss. The outer sleeve crown and the inner crown of the boss are fixedly connected by the retaining screw.

6. The implant single sleeve crown restoration device according to claim 5, characterized in that: In the inner crown of the boss, the taper of the upper frustum section is 20°, and the height of the upper frustum section is 2mm; the taper of the lower retention section is 1°, 2°, 3°, 4°, 4.5°, and 5.1°, and the height of the lower retention section is 1mm, 4mm, and 6mm; the wall thickness of the outer crown of the sleeve is 1mm, and the height of the outer crown of the sleeve is 4mm, 6mm, 10mm, and 12mm; the outer surface of the outer crown of the sleeve is provided with several rings of fixing grooves.

7. Implant single sleeve crown restoration device according to claim 6, characterized in that: The taper of the lower retention section is 4°, and the height of the lower retention section is 1 mm.

8. The implant single sleeve crown restoration device according to claim 5, characterized in that: The angle between the axis of the inner crown of the boss and the vertical direction is 0°, 7.5°, 15°, 25°, 35°, and 45°.

9. The implant single sleeve crown restoration device according to claim 6, characterized in that: After the outer crown of the sleeve and the inner crown of the boss are fixedly connected by the retaining screw, the top of the retaining screw is lower than the top opening of the fixing hole.

10. The implant single sleeve crown restoration device according to claim 6, characterized in that: The upper half of the outer surface of the sleeve crown is smooth, while the lower half of the outer surface is evenly distributed with several rings of fixing grooves.

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