CN108309480A - A kind of dental implant - Google Patents

Abstract

The invention discloses a dental implant, which comprises an implant part and an abutment part implanted in the alveolar bone; wherein, the implant body part and the outer periphery of the cone part are provided with double threads, and the tooth top surfaces of the double threads form Cylindrical surface and conical surface; the double thread of the main part of the implant forms a conical surface with a large upper part and a smaller one at the bottom of the tooth; the implant part has a good bone cutting and bone extrusion effect in the alveolar bone, and has better stability The shoulder of the implant is in the shape of an inverted cone, and the small gap formed with the bone wall is conducive to the filling of new bone and the regeneration of alveolar bone; The anti-rotation structure of the tripartite boss is improved; the conical Morse taper surface of the inner hole of the implant and the positive conical surface of the abutment are processed by ultrasonic surface rolling technology, so that the structure of the implant and abutment The fit is more precise, the problem of micro-leakage is improved and reduced, the implant is screwed in more conveniently and quickly during the operation, and the abutment is more accurately positioned during the repair.

Description

a dental implant

technical field

The invention belongs to the technical field of oral dental implants, and in particular relates to a dental implant with bone extrusion ability and improved microleakage.

Background technique

Since the early 1980s, oral implantology has opened up a new field for the dental community, and implant restoration has become a rapidly developing and reliable means of restoration, and has gained an important position in the field of stomatology. Dental implants, as artificial tooth roots for denture retention devices, have been widely used in the restoration of single tooth defects, partial tooth defects, and complete tooth loss in the oral cavity. At present, there are many kinds of dental implants, but there are still many problems, and there is a lot of room for improvement. Among them, how to reduce trauma and improve initial stability when the implant part is implanted in the alveolar bone, and how to reduce fretting and fretting in the upper structure. Leakage is one of the goals that implants are constantly improving.

Contents of the invention

Aiming at the defects and deficiencies in the above-mentioned prior art, the purpose of the present invention is to provide a dental implant. By rationally designing the shape structure of the double thread of the implant part, the implant part has a good bone in the alveolar bone. The effect of cutting and bone extrusion has better initial stability; the small gap formed between the shoulder of the implant and the bone wall is designed to be in the shape of an inverted cone, which is more conducive to the filling of new bone and contributes to the bone formation of the alveolar bone. Regeneration: Design the structural cooperation between the implant and the abutment and the improved treatment on the metal surface, strengthen the precise connection and anti-rotation function between the implant and the abutment, reduce the micro-leakage of the upper structure, and make it more convenient to screw the implant during surgery Faster, more accurate positioning of the abutment during restoration, and avoiding various complications.

In order to achieve the above object, the technical solution adopted by the present invention is, a dental implant, including the implant part implanted in the alveolar bone, the periphery of the implant part is the implant shoulder part, the implant main body in sequence from top to bottom part and the cone part of the implant, wherein, the outer periphery of the main part of the implant and the cone of the implant is provided with double threads, and the top surface of the double threads of the main part of the implant forms a cylindrical surface, and the bottom surface of the teeth of the double threads of the main part of the implant forms a A tapered surface with a large top and a small bottom.

The double thread structure includes large thread teeth and small thread teeth, wherein the large thread teeth are triangular thread teeth, and the small thread teeth are half triangular thread teeth arranged at the root of one side of the lower part of the triangular thread teeth. The large thread teeth and the small thread teeth The top surfaces of the teeth are parallel; the pitch of the double thread is 0.7mm~1.2mm, and the tooth profile angle is 60°. The tooth height of the large thread is 0.25mm~0.55mm, the width of the tooth top is 0.1mm~0.4mm, and the tooth height of the small thread is 0.08mm~ 0.12mm, tooth top width 0.09mm.

The double thread of the main body of the implant is divided into three sections from top to bottom, the tooth height of the double thread naturally transitions from low to high, and the width of the tooth top of the double thread naturally transitions from large to small; wherein, the tooth height of the upper section is 0.25 mm to 0.35 mm mm, tooth top width is 0.4mm~0.3mm; middle tooth height is 0.35mm~0.45mm, tooth top width is 0.3mm~0.2mm; lower tooth height is 0.45mm~0.55mm, tooth top width is 0.2mm~0.1 mm.

The length of the implant cone part is one-third of the total length of the implant part, and the taper is 4° to 6°. The tooth height of the double thread is the highest, the width of the tooth top is the smallest, and the top surface of the double thread tooth on the outer periphery forms a conical surface; at least two self-tapping grooves are equidistantly arranged on the outer periphery of the cone of the implant.

The shoulder of the implant closes toward the upper platform of the implant to form an inverted conical circular frustum structure with a taper of 6° to 12° and a length of 1.2 mm to 2 mm. The fine threads set on the surface are round threads with a pitch of 0.12mm～0.16mm, tooth height 0.4mm～0.6mm.

It also includes the abutment part fixed in the implant part at the lower part, and the outer periphery of the abutment part is an inverted conical cone, a bevel, a positive curve cone, a positive conical cone and a cylindrical cone from top to bottom. There is a through hole inside; the positive conical round platform, the cylindrical round platform and the anti-rotation boss arranged outside the cylindrical round platform constitute the abutment insertion section inserted into the implant part, and the abutment insertion section directly reaches the cylindrical surface of the inner hole of the implant part. A platform transfer platform is formed between the lower edge interface of the positive curve circular platform and the upper platform of the implant part.

The anti-rotation boss is an improved three-way boss, whose shape is between three-way and three-flower. The radius of the convex part of the improved three-way boss is 0.25mm-0.4mm, and its height is 1.5mm-2.5mm.

The implant part has an inner hole that can be inserted into the abutment part to form an interpolation connection. The inner hole is divided into three sections, and the upper section is a conical implant inner hole with a length of 1.5 mm to 2.5 mm and a taper of 3° to 9°. Taper surface, the middle section is a cylindrical surface with a length of 2.5mm to 3.5mm and a diameter of 2.2mm to 2.6mm, and the lower section is an implant internal thread with a diameter smaller than that of the middle section; the cylindrical surface of the middle section of the inner hole of the implant is provided with an abutment The anti-rotation groove is embedded with the anti-rotation boss on the front, and the two form an anti-rotation structure, and the position of the anti-rotation groove is 0.8mm-1.6mm lower than the top of the implant.

The outer surface of the positive conical truncated cone of the abutment part and the outer surface of the conical Morse taper surface of the implant inner hole of the implant part are all modified by ultrasonic surface rolling technology.

The implant part is a transgingival implant, and the implant shoulder part is a rotating body whose outer circumference is sequentially composed of a transgingival implant bevel and a transgingival implant inverted conical cone from top to bottom.

Compared with the prior art, the present invention has at least the following beneficial effects, through the external thread provided on the outer periphery of the main body of the implant and the cone of the implant, and adopting a double thread structure composed of a uniquely designed large thread tooth and a small thread tooth , enhance the cooperation between the implant part and the alveolar bone, increase the osseointegration area of the implant and the alveolar bone, effectively improve the stability of the implant part in the alveolar bone, and screw the implant more conveniently and quickly.

Furthermore, due to the natural transition of the tooth height of the double thread from low to high, and the natural transition of the tooth top width from large to small, the bottom surface of the double thread of the main body of the implant forms a tapered surface with a large upper part and a smaller lower part, and the upper part of the thread tooth is relatively shallow. But blunt, the lower thread teeth are relatively deep and sharp, so that when the implant is screwed into the alveolar bone, the double thread of the implant gradually transitions from the ability of automatic tapping to the ability of automatic bone extrusion, which enhances the implant's The initial fixation of the alveolar bone effectively improves the treatment effect. Moreover, the outer circumference of the main body and the cone of the implant adopts a unique design of a double thread structure composed of large and small thread teeth, wherein the large thread teeth are triangular thread teeth, and the small thread teeth are set on the lower side of the large triangular thread teeth Half of the triangular thread tooth at the root, the large thread tooth is parallel to the tooth top surface of the small thread tooth. The double-thread design enhances the cooperation between the implant and the alveolar bone, increases the osseointegration area between the implant and the alveolar bone, effectively improves the stability of the implant in the alveolar bone, and makes screwing in the implant more convenient and quick .

Furthermore, the shoulder of the implant is an inverted conical cone. After the implant socket is prepared and screwed into the implant, the small gap formed between the inverted conical shoulder and the bone wall is more conducive to the filling of new bone and helps the alveolar Bone regeneration enables better osseointegration of compact bone and implant to achieve a tight bony seal.

Furthermore, the fine thread at the shoulder can increase the contact area between the implant and the bone tissue at the edge of the cortical bone where the stress is concentrated, and strengthen the early retention of the cortical bone.

Furthermore, since the parameters of the double threads on the periphery of the vertebral part of the implant are the same as those of the lower part of the main part of the implant, that is, the tooth height is the highest and the tooth top is the smallest, the top surface of the double thread on the outer periphery of the cone of the implant forms a conical surface. It is conducive to the navigation of the implant when it is screwed into the alveolar bone, and it also has the effect of cutting the alveolar bone first.

Furthermore, the equidistant self-tapping grooves on the periphery of the implant cone enhance the perfect cutting of the implant without tapping drills, facilitate the smooth screwing of the implant into the alveolar bone, and have the ability to store bone chips effect.

Furthermore, the abutment part is provided with an improved tripartite boss that fits with the improved tripartite groove in the middle section of the inner hole of the implant part. It can not only be positioned rigidly and accurately, but also smoothly in place. It is best to improve the number of tripartite grooves and bosses to three, which not only ensures the accuracy of the judgment direction when the abutment is in place, but also avoids the uncertainty caused by multiple directions.

Furthermore, the outer surface of the positive conical truncated cone of the abutment and the outer surface of the conical Morse taper surface of the inner hole of the implant are treated by ultrasonic surface rolling technology, which promotes the nano-graining of the metal surface layer, which can significantly reduce the material The surface roughness value is ultra-precise, and this technology is used for the most critical part between the implant and the abutment, which improves the micro-leakage problem that is easy to occur in the traditional technology and avoids implant damage caused by bacterial infection. Dental complications.

Furthermore, the implant part can also be designed as a transgingival implant. The advantage of the transgingival implant is that the implant and the abutment are integrated, which can prevent the micro-motion and micro-leakage problems caused by the connection of the abutment. The treatment procedure and treatment time can be shortened, and dental implant complications caused by bacterial descending infection can be avoided.

Further, the shoulder of the implant converges toward the upper platform of the implant to form an inverted conical truncated cone with a taper of 6°-12° and a length of 1.2mm-2mm. After the implant socket is prepared, the small gap formed between the inverted tapered shoulder and the bone wall is more conducive to the filling of new bone, which is conducive to the bone regeneration of the alveolar bone, and makes the alveolar bone and the implant more stable. The osseointegration is better to achieve a tight bony seal, thereby enhancing the fixation effect of the implant, reducing the pain of the patient, and ensuring the success of the implant.

Description of drawings

Fig. 1 is a schematic diagram of three parts of the dental implant of the present invention.

Fig. 2 is a schematic diagram of the thread and cross-sectional structure of the implant part of the present invention.

Fig. 3 is a schematic diagram of the screw internal structure of the implant part of the present invention.

Fig. 4 is a schematic diagram of the structure of the abutment part of the present invention.

Fig. 5 is a schematic diagram of the structure of the transgingival implant of the present invention.

Fig. 6 is a schematic diagram of an improved three-sided boss structure.

In the attached drawings: 4. Internal thread of the implant, 5. Cylindrical surface of the inner hole of the implant, 10. The implant part, 11. The shoulder part of the implant, 12. The main part of the implant, 13. The conical Morse taper surface of the inner hole of the implant , 14, anti-rotation groove, 15, fine thread on the shoulder, 16, double thread, 17, vertebral body of the implant, 18, self-tapping groove, 19, upper platform of the implant, 20, abutment, 21. The insertion section of the abutment, 22. The lower edge interface, 23. The positive conical circular platform, 24. The positive curved circular platform, 25. The crown section of the abutment, 26. The inverted conical circular platform, 27. The groove of the abutment, 28. Groove, 29. Lower edge of the groove, 30. Anti-rotation boss, 31. Cylindrical round platform, 32. Transgingival implant, 33. Upper mouth of abutment, 34. Central positioning bolt, 49. Transgingival implant Body bevel, 50, transgingival implant inverted conical circular platform, 51, double thread tooth height, 52, double thread tooth top, 53, double thread tooth bottom.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

As shown in Fig. 1, Fig. 2, Fig. 3, and Fig. 4, the dental implant of the present invention includes an implant part 10, an abutment part 20 and a central positioning bolt 34; There are double threads 16 with triangular thread teeth, and fine threads 15 with round threads are arranged on the implant shoulder 11, and the implant part 10 is combined with the alveolar ridge through the fine threads 15 and double threads 16; At least 2 to 3 self-tapping grooves 18 are equidistantly arranged on the outer circumference of the body cone part 17, which strengthens the perfect cutting of the implant without tapping drills, and has the function of storing bone debris; the abutment part 20 is formed by the abutment The insertion section 21 is composed of a positive curved circular platform 24 that determines the height of the gingival penetration, and the abutment crown section 25. The center positioning bolt 34 passes through the abutment upper opening 33 of the abutment and is screwed into the implant internal thread 4 to connect the implant and the abutment. The parts are connected as one. The fine thread 15 provided on the surface of the implant shoulder 11 is a round thread with a pitch of 0.12 mm to 0.16 mm and a tooth height of 0.4 mm to 0.6 mm. The start and end of the round thread are naturally smooth without edges and corners. The fine thread 15 is provided on the shoulder portion, which can increase the contact area between the implant and the bone tissue at the edge of the cortical bone where the stress is concentrated, and strengthen the early fixation of the cortical bone. There is a distance of 0.06 mm to 0.20 mm between the fine thread 15 and the upper platform 19 of the implant part, so as to prevent gaps from appearing at the upper platform 19 of the implant part, which is beneficial to the integrity of the platform transfer table.

Due to the design of the double thread 16 in the implant part, and the natural transition of the tooth height 51 of the double thread from low to high, and the natural transition of the width of the tooth top 52 from large to small, in the lower part of the main part of the implant, as the tooth height gradually increases, The width of the tooth top gradually decreases, and the thread teeth are relatively deep and sharp. During the process of screwing the implant into the alveolar bone, the double thread of the implant body part 12 is first screwed in from the highest part of the tooth height and the smallest part of the tooth top The alveolar bone cuts the bone tissue and has a certain ability of self-tapping thread. On the upper part of the main body of the implant, as the tooth height 51 gradually decreases, the width of the tooth top 52 gradually increases, and the thread teeth are relatively shallow and blunt. The implant performs reasonable bone extrusion on the alveolar bone gradually, so that when the implant is screwed into the alveolar bone, the double thread 16 of the implant gradually transitions from the ability of automatic tapping to the ability of automatic bone extrusion. The implant first cuts the alveolar bone and then gradually performs reasonable bone extrusion, which can greatly improve the bonding force between the implant and the alveolar bone, so that the implant can achieve a better effect in the alveolar bone. It is stable and achieves better stability of the implant in the alveolar bone, which not only reduces surgical trauma, but also ensures the success of implant osseointegration.

As shown in Figure 2, the implant shoulder 11 is an inverted conical circular platform with a taper of 6° to 12° and a length of 1.2mm to 2mm, and a fine thread 15 is designed on it. The gap is conducive to the filling of new bone, so that the osseointegration of the compact bone and the implant is better, and a tight bony seal is achieved; the outer periphery of the main body part 12 of the implant and the cone part 17 of the implant adopts large thread teeth and small thread teeth The double-thread 16 structure is uniquely designed, in which the large thread teeth are triangular thread teeth, and the small thread teeth are half triangular thread teeth set at the root of the lower side of the large triangular thread teeth. The top surfaces of the large thread teeth and small thread teeth are Parallel, and the tooth top 52 surface of the external thread of the main body part 12 of the implant forms a cylindrical surface, the tooth bottom 53 surface of the external thread forms a tapered surface with a large upper part and a smaller bottom, and the tooth top 52 surface of the external thread of the implant cone part 17 Conical surface is formed; the double-thread design enhances the cooperation between the implant and the alveolar bone, increases the osseointegration area between the implant and the alveolar bone, and effectively improves the stability of the implant in the alveolar bone, and the screw implant The body is more convenient and quick.

As shown in Figure 2, the pitch of the double thread on the outer periphery of the main body part 12 and the cone part 17 of the implant is 0.7 mm to 1.2 mm, and the tooth profile angle is 60°. It ranges from 0.1mm to 0.4mm, the tooth height of the small thread is 0.08mm to 0.12mm, and the width of the tooth top is 0.09mm. Because the tooth height 51 of the double thread 16 naturally transitions from low to high, and the width of the tooth top 52 naturally transitions from large to small, at the lower part of the main body of the implant, as the tooth height gradually increases, the width of the tooth top gradually decreases, and the thread The teeth are relatively deep and sharp. During the process of screwing the implant into the alveolar bone, the 12 double threads of the main body of the implant are first screwed into the alveolar bone for cutting from the highest part of the tooth height and the smallest part of the tooth top width, which has a certain On the upper part of the main body of the implant, as the tooth height gradually decreases, the width of the tooth top gradually increases, the thread teeth are relatively shallow and blunt, and the implant part 10 gradually performs a reasonable bone adjustment on the alveolar bone. Squeeze, so that in the process of screwing the implant into the alveolar bone, the double thread 16 of the implant gradually transitions from the ability of automatic tapping to the ability of automatic bone extrusion, because the implant first cuts the alveolar bone and then gradually Reasonable bone compression can achieve better stability of the implant in the alveolar bone, which not only reduces surgical trauma, but also enhances the initial fixation of the implant in the alveolar bone, ensuring the osseointegration of the implant success.

As shown in Figure 2, the length of the cone part 17 is one-third of the total length of the implant part 10, and the taper is 4° to 6°. The highest and the smallest tooth tip width. The double-threaded tooth top surface on the outer periphery of the implant cone forms a conical surface, which is not only conducive to the navigation of the implant when it is screwed into the alveolar bone, but also the first to cut the alveolar bone.

As shown in Figures 2, 3 and 4, the implant part 10 has an inner hole that can be inserted into the abutment part 20 to form an interpolation connection. The inner hole is divided into three sections, and the upper section is a conical Morse taper surface 13, The length is 1.5mm-2.5mm, the Morse taper is 3°-9, and the surface is processed by ultrasonic surface rolling technology; the middle section is the cylindrical surface 5 of the inner hole of the implant with a length of 2.5mm-3.5mm and a diameter of 2.2mm-2.6mm; the lower section It is the inner thread 4 of the implant whose diameter is smaller than that of the middle section; the cylindrical surface 5 of the middle section of the inner hole of the implant part is provided with an anti-rotation screw that prevents the rotation of the abutment part and fits with the anti-rotation boss 30 on the cylindrical round table 31 of the abutment part 20 There are 14 grooves, three grooves are the best, and the position of the grooves is 1mm-2mm lower than the top of the implant, so that after the abutment is connected, the top platform 19 of the implant has no gaps and is tight and free of gaps.

In the prior art, the outer surface of the abutment part 20 and the conical Morse taper surface 13 of the inner hole of the implant part 10 are only connected in the state of Morse taper in the prior art, and the purpose is to increase the distance between the two. Precise fit, however, this conventional machining technology is difficult to guarantee a lower roughness value on the metal surface, and there are many traces left by machining on the surface, so it is difficult to avoid the problem of micro-leakage. In the present invention, both the surface of the abutment part and the surface of the conical Morse taper surface of the inner hole of the implant part are treated by ultrasonic surface rolling technology, which can well improve the fretting degree and The problem of microleakage. Ultrasonic surface rolling technology is a new ultrasonic-assisted surface modification technology, which can promote the nano-graining of the metal surface layer, which can significantly reduce the surface roughness value of the material, presenting an ultra-precise state, and can also improve the surface stress distribution and improve the surface quality. Hardness, bearing capacity, wear resistance, corrosion resistance and fatigue resistance. At the most critical part of the Morse taper fit between the implant and the abutment, using this technology to treat the metal surface can avoid bacterial downward infection caused by micro-leakage, and reduce long-term peri-implantitis and other complications of the implant. occurrence of the disease.

As shown in Fig. 2, Fig. 3 and Fig. 4, in the present invention, the metal surface of the conical Morse taper surface 13 of the conical Morse taper surface 13 of the abutment part 20 and the implant part 10 adopts ultrasonic surface rolling technology The treatment promotes the nano-grains of the metal surface layer, which can significantly reduce the surface roughness value of the material, presenting an ultra-precise state, greatly strengthening the precise connection between the two, and solving the fretting and micro The problem of leakage can avoid dental implant complications caused by bacterial infection.

As shown in Fig. 4 and Fig. 1, the abutment part 20 is a band-pass from top to bottom with an inverted conical truncated cone 26, a bevel 28, a positive curved truncated circular truncated 24, a forward conical conical truncated 23 and a cylindrical circular truncated 31. The rotating body of the hole; the cylindrical round table 31 is provided with an anti-rotation boss 30 that fits with the anti-rotation groove 14 in the inner hole of the implant part 10; the positive conical round table 23 and the cylindrical round table 31 and the anti-rotation The swivel boss 30 constitutes the abutment insertion section 21 inserted into the implant part 10, and the abutment insertion section 21 directly reaches the cylindrical surface 5 of the inner hole of the implant part 10; after the implant part 10 and the abutment part 20 are connected, the abutment part 20 A table top for platform transfer is formed between the lower edge interface 22 of the positive curve circular platform 24 and the upper platform 19 of the implant part; crown coating, so that the neck edge of the crown fits tightly with the lower edge 29 of the bevel; the groove 27 of the abutment is conducive to the direction positioning, ensures the accurate positioning of the crown, and has the effect of preventing rotation. Among them, the anti-rotation boss 30 is an improved three-way boss whose shape is between three-way and three-flower. The radius of the raised part of the improved three-way boss is 0.25mm to 0.4mm, and its length is 1.5mm to 2.5mm. chamfering; the anti-rotation groove 14 is an improved three-sided groove matching it, so that when the abutment is inserted into the implant, it can be rigidly and accurately positioned, and can be smoothly positioned; the number of bosses is three. This ensures the accuracy of judging the direction when the abutment is in place, and also avoids the uncertainty caused by multiple directions.

The surface of the positive conical round table 23 is processed by ultrasonic surface rolling technology, and the central positioning bolt 34 passes through the abutment opening 33 of the abutment part and is screwed into the internal thread 4 of the implant part to connect the implant part 10 and the abutment part 20 into a One body, after the two are connected, a platform transfer platform is formed between the lower edge interface 22 of the positive curve circular platform 24 of the abutment part 20 and the upper port platform 19 of the implant part, which increases the biological width around the implant; The inverted conical round platform 26 and the bevel 28 below it together form the abutment. The crown section 25 is covered by the crown, which ensures that the neck edge of the crown and the lower edge 29 of the bevel are closely fitted to prevent gaps when the crown is restored. or steps, to avoid the invasion of bacteria, so that the crown restoration is more rigorous; the abutment groove 27 is conducive to the positioning of the direction, ensuring the accurate positioning of the crown, and has the effect of preventing rotation; the positive curve circular platform 24 can have 1.0mm～4.0mm different gingival height specifications to adapt to different thickness of gingiva.

As shown in Figure 6, the anti-rotation boss 30 is an improved three-sided boss, whose shape is between the three sides and the three flowers, that is, the cross-section of the boss is triangular, and the three vertices of the triangle are rounded; Of course, in other embodiments of the present invention, the anti-rotation boss 30 may also be a multi-sided boss, and the anti-rotation groove is designed to match it.

As shown in Figure 5, the implant part 10 can also be designed as a transgingival implant 32, that is, the implant part and the abutment part are designed to be integrated, that is, a one-piece implant, and the implant shoulder part is a periphery from top to bottom It is the rotary body of the transgingival implant groove 49 and the transgingival implant inverted cone 50 in turn, the transgingival implant inverted conical circular platform 50 is the transgingival part, the transgingival implant groove 49 and the transgingival implant The matching abutment is covered by the crown, so that the neck of the crown fits closely with the lower edge of the transgingival implant groove 49; the peripheral double thread and internal structure of the transgingival implant 32 are the same as those of the implant part 10 . The advantage of the transgingival implant is that the implant and the abutment are integrated, which can reduce the treatment procedures, shorten the number of operations and treatment time, and also prevent the micro-motion and micro-leakage problems caused by the connection of the abutment, avoiding the Bacterial infection can cause implant complications.

Claims (10)

1. A dental implant, characterized in that: comprise an implant portion (10) implanted in the alveolar bone, the implant portion (10) periphery is followed by implant shoulder portion (11), implant Body body part (12) and plant body cone part (17), wherein, the periphery of plant body body part (12) and plant body cone body part (17) is provided with double thread (16), and plant body body part (12 ) surface of the tooth top (52) of the double thread forms a cylindrical surface, and the tooth bottom (53) surface of the double thread (16) of the implant main body (12) forms a tapered surface with a large upper part and a smaller lower part. 2. The dental implant according to claim 1, characterized in that: the double thread (16) structure includes large thread teeth and small thread teeth, wherein the large thread teeth are triangular thread teeth, and the small thread teeth are arranged on triangular The half triangular thread tooth at the root of the lower part of the thread tooth, the large thread tooth is parallel to the tooth top surface of the small thread tooth; the pitch of the double thread (16) is 0.7mm~1.2mm, and the tooth profile angle is 60°, of which the large thread tooth The height is 0.25mm～0.55mm, the width of the tooth top is 0.1mm～0.4mm, the tooth height of the small thread is 0.08mm～0.12mm, and the width of the tooth top is 0.09mm. 3. The dental implant according to claim 1 or 2, characterized in that: the double thread (16) of the implant body (12) is divided into three sections from top to bottom, and the tooth height (51) of the double thread is determined by There is a natural transition from low to high, and the width of the double thread tooth top (52) naturally transitions from large to small; among them, the tooth height of the upper section is 0.25mm~0.35mm, the width of the tooth top is 0.4mm~0.3mm; the tooth height of the middle section is 0.35mm~ 0.45mm, the tooth top width is 0.3mm~0.2mm; the tooth height of the lower section is 0.45mm~0.55mm, and the tooth top width is 0.2mm~0.1mm. 4. The dental implant according to claim 1, characterized in that: the length of the implant cone (17) is one-third of the total length of the implant (10), and the taper is 4°-6° , the parameters of the outer peripheral double threads (16) are the same as those of the lower section of the main body of the implant (12). The top surface forms a conical surface; at least two self-tapping grooves (18) are equidistantly arranged on the outer periphery of the implant cone (17). 5. The dental implant according to claim 1, characterized in that: the implant shoulder (11) is folded toward the upper platform (19) of the implant to form an inverted conical conical structure with a taper of 6° ～12°, the length is 1.2mm～2mm, the fine thread (15) that its surface is provided with is round thread, pitch is 0.12mm～0.16mm, tooth height 0.4mm～0.6mm. 6. The dental implant according to claim 1, characterized in that: it also includes an abutment part (20) whose lower section is fixed in the implant part (10), and the periphery of the abutment part (20) is from top to bottom The reverse conical frustum (26), the bevel (28), the positive curved frustum (24), the positive conical frustum (23) and the cylindrical frustum (31) are in sequence, and a through hole is arranged inside the abutment part (20) The forward conical round platform (23), the cylindrical round platform (31) and the anti-rotation boss (30) arranged outside the cylindrical round platform (31) form the abutment insertion section (21) for inserting the implant part (10), The insertion section of the abutment (21) directly reaches the cylindrical surface (5) of the inner hole of the implant, and a platform transfer is formed between the lower edge interface (22) of the positive curved circular platform (24) and the upper platform (19) of the implant countertops. 7. The dental implant according to claim 6, characterized in that: the anti-rotation boss (30) is an improved tripartite boss, the shape is between the tripartite and the three flowers, and the radius of the convex part of the improved tripartite boss is 0.25mm to 0.4mm, and its height is 1.5mm to 2.5mm. 8. The dental implant according to claim 6, characterized in that: the implant part (10) has an inner hole that can be inserted into the abutment part (20) to form an interpolation connection, and the inner hole is divided into three sections , the upper section is a conical Morse taper surface (13) in the implant hole with a length of 1.5mm to 2.5mm and a taper of 3° to 9°, and the middle section is a cylindrical shape with a length of 2.5mm to 3.5mm and a diameter of 2.2mm to 2.6mm surface (5), the lower section is the implant internal thread (4) with a diameter smaller than that of the middle section; the cylindrical surface (5) in the middle section of the inner hole of the implant part is provided with an anti-rotation boss (30) to fit with the abutment part (20) The anti-rotation groove (14) forms an anti-rotation structure, and the position of the anti-rotation groove (14) is 0.8 mm to 1.6 mm lower than the top of the implant. 9. The dental implant according to claim 6 or 8, characterized in that: the outer surface of the positive conical cone (23) of the abutment portion (20) and the conical shape of the implant inner hole of the implant portion (10) The outer surface of the Morse taper surface (13) is modified by ultrasonic surface rolling technology. 10. The dental implant according to claim 1, characterized in that: the implant part (10) is a transgingival implant (32), and the implant shoulder part (11) is a peripheral from top to bottom in order to wear The rotator of the groove of the gingival implant (49) and the inverted conical cone (50) of the transgingival implant.