Implant denture device

Abstract

The present invention discloses an implant denture device, including an implant and a crown, wherein the crown is arranged on the implant by a screw, the implant includes a main body, the outer surface of the main body is provided with an external thread, the implant is provided with a blind hole inside, the blind hole is stepped, and a shallow cylindrical hole, a deep cylindrical hole and a threaded hole are arranged in sequence from top to bottom in the blind hole; the crown is hollow inside, and a stepped hole is arranged inside, the lower part of the crown is provided with a short cylinder adapted to the shallow cylindrical hole and a long cylinder adapted to the deep cylindrical hole, and the rod of the screw passes through the stepped hole and is connected to the threaded hole. The present invention increases the strength of the crown contacting with the implant and the insertion part of the implant, the crown is fixed to the implant by a central screw, the positioning is accurate, and no base is required, which greatly simplifies the implant restoration structure, simplifies the restoration surgery, and shortens the restoration time. It has a simple structure and is easy to manufacture, and the manufacturing and maintenance costs are low.

Description

Technical Field

[0001] The invention relates to an implant denture device, belonging to the technical field of oral implant medicine. Background Art

[0002] In the early 1950s, after Swedish scientist Professor BBB BemaBB discovered the "osseointegration" phenomenon of titanium metal, he considered that titanium could be used to make dental implants to construct artificial teeth. So in 1965, he implanted his titanium dental implant into the mouth of a volunteer and completed the denture restoration. His attempt was successful. Since then, starting from the 1980s, titanium dental implants have become popular all over the world. Now, it has become an important and primary means of restoring missing teeth for humans. It is hailed as one of the greatest inventions of mankind in the 20th century, which enables humans to obtain a "third set of teeth", that is, after deciduous teeth and permanent teeth, if any teeth are lost, titanium dental implant technology can be used to recreate new teeth.

[0003] The world's first successful titanium commercial dental implant is the BBB BemaBB series product of the Swedish company Nobel BiocaBe. This screw-shaped dental implant became the basis for the subsequent development of dental implants. Its basic structure is to divide artificial teeth into three parts, namely the implant, the abutment and the crown. The abutment must be fixed to the implant with screws, and the crown is fixed to the abutment, usually by bonding.

[0004] By the end of the 1990s, titanium dental implant technology had matured, received widespread attention and was widely used. Among them, implant restoration technology itself includes two branch technologies, namely implant technology (including abutment) and crown technology (also known as denture technology). The currently popular crown technology can provide a variety of crown products, including metal crowns, metal porcelain crowns and all-ceramic crowns.

[0005] Humans have used precious metal gold to decorate and reinforce teeth for more than two thousand years, and it is still used today. Modern technology and dentistry can provide more options. For example, in the past 20 years, ceramic crowns with better biocompatibility have received much attention, among which zirconia crowns have developed the fastest. There are zirconia porcelain crowns (poBcelaiB fused to ziBcoBia, PFZ crowns, similar in structure to metal porcelain crowns, poBcelaiB fused to metal, PFM crowns) and full zirconia crowns (moBolithicziBcoBia, MZ, or full coBtouB ziBcoBia, FCZ crowns). These two types of zirconia crowns and their technologies have been widely used in actual dental clinics. They each have their own advantages and indications.

[0006] Zirconia is known as the "king of ceramics" and its strength can reach 1200MPa, which is the strength level of stainless steel. It also has high hardness and good impact toughness. It is the only known practical ceramic material. It has been widely used as a crown material in dental restoration clinics. However, in dental implant restoration treatment, if a special zirconia abutment (also known as a Ti-base abutment) is used, the role of the abutment is limited in some cases. There are problems such as: the existence of the abutment will complicate the system, increase the complexity of the restoration surgery, prolong the treatment time, and increase the restoration cost. Summary of the invention

[0007] In view of the deficiencies in the prior art, the present invention provides an implant denture device which has a simple structure, is easy to operate, does not require a base, is convenient for surgery, is easy to implant and repair, and has a low cost.

[0008] The technical solution of the present invention to solve the above technical problems is as follows: an implant denture device, comprising an implant and a crown, wherein the crown is arranged on the implant by a screw, the implant comprises a main body, an outer surface of the main body is provided with an external thread, a blind hole is arranged inside the implant, the blind hole is stepped, and a shallow cylindrical hole, a deep cylindrical hole and a threaded hole are arranged in sequence from top to bottom in the blind hole;

[0009] The interior of the crown is hollow and provided with a stepped hole. The lower part of the crown is provided with a short cylinder adapted to the shallow cylindrical hole and a long cylinder adapted to the deep cylindrical hole. The rod of the screw passes through the stepped hole and is connected to the threaded hole.

[0010] The beneficial effects of the present invention are as follows: the long cylinder of the dental crown cooperates with the deep cylindrical hole of the implant, that is, the long cylinder of the dental crown is inserted into the deep cylindrical hole of the implant, and the short cylinder of the dental crown cooperates with the shallow cylindrical hole of the implant, that is, the dental crown is inserted into the implant and the short cylinder and the shallow cylindrical hole are inserted and matched, and the long cylinder and the short cylinder of the dental crown cooperate to form a stepped cylindrical structure, which can provide a higher root for the dental crown, that is, the strength of the contact between the dental crown and the implant and the insertion part of the dental crown is increased, and the dental crown is fixed to the implant by a central screw, with precise positioning and no base required, which greatly simplifies the implant restoration structure, simplifies the restoration surgery, and shortens the restoration time. It has a simple structure and is easy to manufacture, with low manufacturing and maintenance costs.

[0011] Based on the above technical solution, the present invention can also be improved as follows.

[0012] Furthermore, at least one boss is provided on the bottom of the shallow cylindrical hole, and a groove corresponding to the boss is provided on the short cylinder.

[0013] The beneficial effect of adopting the above further scheme is that in order to further ensure the positioning stability of the implant and the crown and avoid relative rotation between the two, a boss and a corresponding groove are provided, and a "wedge" effect is formed through the cooperation of the boss and the groove, thereby playing a role in circumferential positioning or anti-rotation of the crown.

[0014] Furthermore, the implant comprises a head, a frustum is provided on the top of the head, the support surface of the frustum is a plane structure or a conical structure, and the dental crown is provided with an annular bottom surface matched with the support surface of the frustum.

[0015] The beneficial effect of adopting the above further scheme is that the supporting surface on the top of the truncated cone can be a flat structure or a conical structure, and the cone angle of the conical structure can be set between 160-150 degrees, which can provide a larger contact area for the joint between the crown and the implant. Because the surface area of ​​the conical structure is much larger than that of a circular plane with the same diameter, the stress here can be reduced and the sealing can be enhanced.

[0016] Furthermore, the implant also includes a neck portion arranged between the head portion and the main body portion, and the neck portion is an arc-shaped concave structure.

[0017] The beneficial effect of adopting the above-mentioned further scheme is that the arc-shaped thin neck will be located in the gums, and the implant is a transgingival implant, that is, it has a transgingival structural feature, also known as a "non-submersible" or "soft tissue level" implant. The surgical method is a "one-time surgery", that is, only one-stage surgery and implantation surgery are performed, and after the soft tissue heals and the stitches are removed, there is no need for further invasive surgery (second-stage surgery) to take a mold and install the crown. After the crown is correctly installed, the exposed part of the crown screw hole is blocked by conventional methods.

[0018] Furthermore, the outer diameter of the cone is greater than the maximum diameter of the main body.

[0019] The beneficial effects of adopting the above further solution are that, on the one hand, the supporting crown is more stable, and on the other hand, it is convenient to implant the denture and facilitate subsequent repair work.

[0020] Furthermore, a hexagonal hole is provided between the deep cylindrical hole and the threaded hole.

[0021] The beneficial effect of adopting the above further scheme is that the purpose of the hexagonal hole is not to prevent the crown from rotating, but the rotation drive structure of the implant itself is used to drive the implant to rotate into the prepared jaw bone hole during the implant surgery.

[0022] Furthermore, an inner thread connected to the screw thread is provided on the inner wall of the long cylinder.

[0023] The beneficial effect of adopting the above further scheme is that the screw can fix the crown on the implant by connecting with the threaded hole of the implant, and the stepped hole inside the crown can also be provided with an internal thread, which can be connected with the external thread of the screw, further improving the installation stability of the screw and the crown.

[0024] Furthermore, the long cylinder is a conical structure that is thick at the top and thin at the bottom.

[0025] The beneficial effect of adopting the above further scheme is that a cone structure with a small cone angle is specifically adopted, and the cone angle is between 3-5B, which can make the root of the long cylinder contact and seal with the upper part of the deep cylindrical hole of the implant. Because the long cylinder will have appropriate squeezing on the upper end wall of the deep cylindrical hole, the ability of the crown material with greater hardness to withstand compressive stress is superior.

[0026] Furthermore, the boss is an arc convex structure, the groove is an arc concave structure matched with the arc convex structure, and the central angle corresponding to the arc convex structure is between 45-90 degrees.

[0027] The beneficial effect of adopting the above further scheme is that the inner and outer surfaces of the boss are respectively arc-shaped, the arc of the inner surface is adapted to the outer surface of the long cylinder, the groove is adapted to the boss, and the boss and the groove are tightly engaged to form a "wedge" effect, which plays a role in circumferential positioning or anti-rotation of the crown.

[0028] Furthermore, at least one rotary cut groove is provided on the main body.

[0029] The beneficial effect of adopting the above further scheme is that it has good self-tapping cutting performance, can improve the initial stability of the implant, and achieve the purpose of shortening the dental implant surgery time.

[0030] Furthermore, the dental crown is made of zirconium dioxide.

[0031] The beneficial effect of adopting the above further scheme is that the crown adopts a full zirconia crown moBolithicziBcoBia or full coBtouB ziBcoBia, which can avoid the porcelain collapse phenomenon that has long troubled the dental field by virtue of the high strength and good toughness of zirconia, rather than a composite all-ceramic porcelain crown structure in which other ceramics are fused to the zirconia inner crown. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 It is a schematic diagram of the overall plane section of the present invention;

[0034] Figure 3 It is a schematic diagram of the three-dimensional structure of the implant structure of the present invention;

[0035] Figure 4 The three-dimensional structure diagram of the implant of the present invention shows a circular arc convex;

[0036] Figure 5 It is a schematic diagram of the cross-sectional structure of the implant of the present invention and shows the position of the virtual cross-sectional plane;

[0037] Figure 6 It is a schematic diagram of the planar structure of the present invention and shows the position of the virtual section plane;

[0038] Figure 7 It is a structural schematic diagram of the present invention at a virtual section plane 4;

[0039] Figure 8 It is a schematic diagram of the three-dimensional structure of the tooth crown of the present invention from a top view angle;

[0040] Fig. 9 It is a schematic diagram of the three-dimensional structure of the dental crown of the present invention when viewed from above;

[0041] Fig.10 is a schematic diagram of a cutaway three-dimensional structure of a dental crown of the present invention;

[0042] Fig.11 This is a schematic diagram of the screw structure of the present invention;

[0043] Fig.12 It is a plane section schematic diagram when the truncated cone and the long cylindrical body of the present invention adopt the conical surface;

[0044] Fig.13 It is a schematic plan view of the clinical repair effect of the present invention.

[0045] In the figure, 1, implant; 1a, main body; 1b, neck; 1c, frustum; 1d, shallow cylindrical hole; 1e, deep cylindrical hole; 1f, bottom of shallow cylindrical hole; 1g, hexagonal hole; 1h, boss; 1b, top surface of boss; 1m, threaded hole; 2, crown; 2a, crown body; 2b, internal thread; 2c, long cylinder; 2d, top of groove; 2e, groove; 2f, annular bottom surface; 2g, short cylinder; 2h, bottom surface of short cylinder; 3, screw; 3a, screw head; 3b, screw rod; 3c, external thread; 4, virtual section plane; 5, jawbone; 6, gum. DETAILED DESCRIPTION

[0046] The principles and features of the present invention are described below in conjunction with examples. The examples are only used to explain the present invention and are not used to limit the scope of the present invention.

[0047] like Figure 1-Figure 13As shown, an implant denture device comprises an implant 1 and a crown 2, wherein the crown is arranged on the implant by a screw 3, the implant comprises a main body 1a, an outer surface of the main body is provided with an external thread, a blind hole is arranged inside the implant, the blind hole is stepped, and a shallow cylindrical hole 1d, a deep cylindrical hole 1e and a threaded hole 1m are arranged in sequence from top to bottom in the blind hole;

[0048] The crown body 2a of the crown is hollow inside and has a stepped hole inside. The lower part of the crown is provided with a short cylinder 2g adapted to the shallow cylindrical hole and a long cylinder 2c adapted to the deep cylindrical hole. The shank of the screw passes through the stepped hole and is connected to the threaded hole. The bottom surface 2h of the short cylinder contacts the bottom 1f of the shallow cylindrical hole.

[0049] At least one boss 1h is provided on the bottom of the shallow cylindrical hole, and a groove 2e corresponding to the boss is provided on the short cylinder. In order to further ensure the positioning stability of the implant and the crown and prevent the relative rotation of the two, a boss and a corresponding groove are provided, and a "wedge" effect is formed by the cooperation of the boss and the groove, thereby playing a role in circumferential positioning or anti-rotation of the crown. 1-3 such arc bosses can be provided, evenly distributed on the bottom 1f of the shallow cylindrical hole.

[0050] The implant comprises a head, a truncated cone 1c is provided on the top of the head, the support surface of the truncated cone is a plane structure or a conical structure, and the crown is provided with an annular bottom surface 2f adapted to the support surface of the truncated cone. The support surface on the top of the truncated cone can be a plane structure or a conical structure, and the cone angle of the conical structure can be set between 160 and 150 degrees, which can provide a larger contact area for the joint between the crown and the implant. Since the surface area of ​​the conical structure is much larger than that of a circular plane with the same diameter, the stress here can be reduced and the sealing performance can be enhanced.

[0051] The implant also includes a neck 1b disposed between the head and the main body, and the neck is an arc-shaped concave structure. The arc-shaped thin neck will be located in the gums 6. The implant is a transgingival implant, that is, it has a transgingival structural feature, also known as a "non-submersible" or "soft tissue level" implant. The surgical method is a "one-time surgery", that is, only one-stage surgery and implantation surgery are performed. After the soft tissue heals and the stitches are removed, no invasive surgery (second-stage surgery) is required to take a mold and install the crown. After the crown is correctly installed, the exposed part of the crown screw hole is blocked by conventional methods.

[0052] The outer diameter of the truncated cone is larger than the maximum diameter of the main body, which makes the supporting crown more stable and facilitates the subsequent restoration work.

[0053] A hexagonal hole 1g is also provided between the deep cylindrical hole and the threaded hole. The purpose of the hexagonal hole is not to prevent the crown from rotating, but to be a rotation driving structure of the implant itself, which is used to drive the implant to rotate into the prepared jaw bone hole during the implant surgery.

[0054] The inner wall of the long cylinder is provided with an internal thread 2b connected with the screw thread. The screw can be connected with the threaded hole of the implant to fix the crown on the implant. The stepped hole in the crown can also be provided with an internal thread, which can be connected with the external thread of the screw, further improving the installation stability of the screw and the crown.

[0055] The long cylinder is a cone structure that is thick at the top and thin at the bottom. Specifically, a cone structure with a small cone angle is adopted, and the cone angle is between 3-5 degrees, so that the root of the long cylinder can contact and seal with the upper part of the deep cylindrical hole of the implant, because the long cylinder will appropriately squeeze the hole wall at the upper end of the deep cylindrical hole, and the superior ability of the crown material with greater hardness to withstand compressive stress is utilized.

[0056] The boss is a circular arc convex structure, and the groove is a circular arc concave structure matched with the circular arc convex structure, and the central angle of the circular arc convex structure is between 45 and 90 degrees. The inner and outer surfaces of the boss are arc-shaped, and the arc of the inner surface is matched with the outer surface of the long cylinder. The groove is matched with the boss, and the boss and the groove are tightly engaged to form a "wedge" effect, which plays a role in circumferential positioning or anti-rotation of the crown.

[0057] The height of the boss is half the depth of the shallow cylindrical hole, and the depth of the groove is half the height of the short cylinder. This ensures that the boss and the groove are more stably engaged and positioned, and avoids the problem of unstable positioning of the boss and the groove due to insufficient boss height. A small section of boss 1h is provided on the bottom 1f of the shallow cylindrical hole, and the top surface 1B of the boss is in the middle of the depth of the shallow cylindrical hole 1d, that is, the height of this boss 1h is half the depth of the shallow cylindrical hole. The top 2d of the groove is located in the middle waist of the short cylinder 2g, and the depth of the groove is half the length of the short cylinder.

[0058] The main body is provided with at least one rotary cutting groove. It has good self-tapping cutting performance, can improve the initial stability of the implant, and achieve the purpose of shortening the dental implant surgery time.

[0059] The crown is made of zirconium dioxide. The crown is a full zirconium oxide crown moBolithicziBcoBia or fullcoBtouB ziBcoBia. Full zirconium oxide crowns can be selected for the back teeth. In view of the fact that the aesthetics and simulation degree of full zirconium oxide crowns are inferior to those of zirconium oxide porcelain crowns, PFZ crowns can still be selected for the front teeth. In short, with the help of the high strength and good toughness of zirconium oxide, this crown structure can avoid the porcelain collapse phenomenon that has plagued the dental community for a long time.

[0060] The screw enters the hole in the crown and reaches the threaded hole in the blind hole of the implant. The blind hole of the implant is fixed to the dental implant by screwing with the threaded hole. Figure 7 The cross-sectional view after the virtual section plane 4 can clearly show the positions of the implant 1, the crown 2 and the screw 3.

[0061] See Fig.11 The central screw 3 has a cylindrical head screw head 3a, a rod screw rod 3b and an external thread 3c at the lower section of the rod. Fine pitch threads can be used to obtain better anti-loosening effect. Fine pitch threads have better anti-loosening effect because of their smaller helix angle. In addition, the thread diameter is also the rod diameter of 2mm and 2.2mm. The thread specifications are M2×0.3 and M2.2×0.3, and the metric 60-degree triangular thread can provide higher connection strength.

[0062] See Fig.12 , which is a part of the crown and the implant. The figure shows that the circular platform 1c of the implant 1 can be set as a conical surface, and the cone angle is set between 160-150 degrees. This can provide a larger contact area for the joint between the crown and the implant here, because the surface area of ​​the truncated cone is much larger than the circular plane with the same diameter, thus reducing the stress here and enhancing the sealing. In addition, the long cylinder 2c of the crown 2 can also be set as a small cone with a cone angle of 3-5 degrees. This can make the root of the long cylinder 2c contact and seal with the upper part of the deep cylindrical hole 1e of the implant, because the long cylinder 2c will have appropriate extrusion on the upper end wall of the deep cylindrical hole 1e, and utilize the superior ability of zirconia ceramic material to withstand compressive stress.

[0063] See Fig. 9 , the length of the short cylinder 2g of the crown 2 can be set to just reach the top of the arc concave 2d. In this way, all the arc concave 2e are cancelled, and the crown 2 does not have the anti-rotation function. After the implant is inserted, it can stay at any position in the circumferential direction and be fixed. This situation is suitable for dental bridges, that is, multi-crown connected structures, because the dental bridge is supported by two or more implants, here it refers to a three-unit bridge, that is, the two ends of the dental bridge are two crowns that cooperate with the implants, and the middle one is a suspended crown without implant support. Therefore, after the two crowns are respectively inserted into the implants, a natural anti-rotation effect is formed for the entire dental bridge, and there is no need for the crowns to resist rotation by themselves. On the contrary, if there is an anti-rotation structure in the crown, assembly interference will occur and it will not be able to or cannot be well positioned.

[0064] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An implant denture device, comprising an implant (1) and a crown (2), wherein the crown (2) is arranged on the implant (1) by means of a screw (3), characterized in that: The implant (1) comprises a main body (1a), an external thread is provided on the outer surface of the main body (1a), a blind hole is provided inside the implant (1), the blind hole is stepped, and a shallow cylindrical hole (1d), a deep cylindrical hole (1e) and a threaded hole (1m) are provided in sequence from top to bottom; The dental crown (2) is hollow inside and is provided with a stepped hole inside. The lower part of the dental crown (2) is provided with a short cylinder (2g) adapted to the shallow cylindrical hole (1d) and a long cylinder (2c) adapted to the deep cylindrical hole (1e). The rod of the screw (3) passes through the stepped hole and is connected to the threaded hole (1m). At least one boss (1h) is provided on the bottom of the shallow cylindrical hole (1d), and a groove (2e) corresponding to the boss (1h) is provided on the short cylinder (2g); A hexagonal hole (1g) is also provided between the deep cylindrical hole (1e) and the threaded hole (1m); The boss (1h) is a circular arc convex structure, and the groove (2e) is a circular arc concave structure adapted to the circular arc convex structure. The central angle corresponding to the circular arc convex structure is between 45 and 90 degrees.

2. The implant denture device according to claim 1, characterized in that: The implant (1) comprises a head, a frustum (1c) is provided on the top of the head, the support surface of the frustum (1c) is a plane structure or a conical structure, and the dental crown (2) is provided with an annular bottom surface (2f) matching the support surface of the frustum (1c).

3. The implant denture device according to claim 2, characterized in that: The implant (1) further comprises a neck (1b) arranged between the head and the main body (1a), and the neck (1b) is in the form of a circular arc concave structure.

4. The implant denture device according to claim 1, characterized in that: An inner wall of the long cylindrical column (2c) is provided with an internal thread (2b) threadably connected to the screw (3).

5. The implant denture device according to claim 2, characterized in that: The outer diameter of the truncated cone (1c) is greater than the maximum diameter of the main body (1a).

6. The implant denture device according to claim 1, characterized in that: The dental crown (2) is made of zirconium dioxide.

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