CN112807111A

CN112807111A - Bionic neck curve aesthetic implant

Info

Publication number: CN112807111A
Application number: CN202110175356.9A
Authority: CN
Inventors: 张文杰; 蒋欣泉; 祁轩宇; 孙宁佳
Original assignee: Ninth Peoples Hospital Shanghai Jiaotong University School of Medicine
Current assignee: Ninth Peoples Hospital Shanghai Jiaotong University School of Medicine
Priority date: 2021-02-09
Filing date: 2021-02-09
Publication date: 2021-05-18
Anticipated expiration: 2041-02-09
Also published as: CN112807111B

Abstract

The invention discloses a bionic neck curve aesthetic implant, which comprises: the base part, the bionic neck part and the implant body part are sequentially arranged from top to bottom; the bionic neck comprises: a platform transfer region and a bearing region, wherein the proximal and distal sides of the platform transfer region are convex towards the coronal direction, and the lip and cheek sides of the platform transfer region are concave towards the root direction; the platform transfer area is an asymmetric conical surface with the diameter gradually decreasing from top to bottom, and the bearing area is connected to the bottom end of the platform transfer area and horizontally faces outwards; the upper end of the implanted body part is also convex towards the coronal direction in the medial-distal direction, concave towards the root direction in the buccal direction, and the upper section of the implanted body part is provided with fine threads. The invention adopts the neck thread structure with the bionic curve to replace the neck design of the traditional planar implant, is more consistent with the outline of the alveolar bone, greatly utilizes the alveolar bone and the bone height of the side wall near and far the middle of the extraction socket, and maintains the natural shape of soft tissues to achieve the best aesthetic effect.

Description

Bionic neck curve aesthetic implant

Technical Field

The invention relates to the technical field of oral dental implants, in particular to a bionic neck curve aesthetic implant.

Background

With the rapid development of economic society and oral implant technology, dental implants have become the first choice for more and more patients to treat dentition defects or lack of dentition. The key of the success rate of oral implantation and the long-term life of the implant lies in the osseointegration between the implant surface and the alveolar bone, so the contact area between the alveolar bone and the implant surface should be increased as much as possible to obtain good osseointegration effect and improve the success rate of implantation. In particular, for the restoration of the aesthetic zone of the upper anterior teeth, the aesthetic effect should be ensured while restoring the occlusal function. Studies have shown that alveolar bone resorption after a missing tooth leads to loss of the gingival papilla and gingival morphology change, which is a major challenge for aesthetic restoration of the upper anterior teeth.

The normal alveolar process is characterized in that the labial cheek is sunken towards the root side, the mesial and distal lateral crown sides are raised, the labial alveolar process is matched with the cementum limit curve of the tooth neck, namely the neck curve, and a large amount of periodontal ligament fibers are attached to the labial alveolar process and the cervical alveolar process to provide strong supporting force. In the individual teeth, especially in the anterior region, the curvature of the cervical curve increases, thus allowing more periodontal ligament fibers to be utilized to help maintain stability of the anterior teeth. In alveolar bone absorption after extraction of anterior teeth, the labial and palatal alveolar ridge crests have obvious vertical bone absorption, and the labial and palatal alveolar ridge crests have obvious vertical bone absorption than the palatal alveolar ridge, so that the structure of the physiological curve is more obvious. The natural gum is pink, has thin edges, and forms an arc line which is concave towards the root on the labial and buccal sides. Convex in the coronal direction at the mesial-distal direction and fill the gaps between the adjacent teeth to form the gingival papilla. The presence of the gingival papilla may fill the "black triangle" area of the adjacent tooth after implant restoration, and its morphology depends on the height of the underlying alveolar fossa near and far the alveolar space, thus maintaining the height of the alveolar space has an important aesthetic impact.

The hollow short implant provided by publication No. CN101366664A is the same as most of the conventional implants, the neck structure is a plane, and the implant can not be matched with the contour curve of the alveolar bone after implantation, so that the implant is implanted in a deep part, and the residual height of the alveolar bone at the position near to and far from the implant is sacrificed.

Platform transfer as described in the CN102357045A design of the conventional implant is achieved by installing an abutment with root diameter smaller than the crown diameter of the implant, and using this as a soft tissue stop, a more reliable seal of the gingival epithelial cuff is formed, and micro-leakage and bone resorption are avoided. However, the final neck morphology approaches a flat surface, losing the physiological structure of the gingival papilla and the underlying alveolar process support, which adversely affects the aesthetics.

Disclosure of Invention

The invention aims to simulate the natural enamel cementum boundary curve to maintain the soft tissue form and achieve more aesthetic effect.

In order to achieve the above object, the present invention provides a bionic neck curve aesthetic implant, comprising: the base part, the bionic neck part and the implant body part are sequentially arranged from top to bottom; the bionic neck comprises: a platform transfer region and a soft tissue receiving region, wherein the proximal and distal sides of the platform transfer region are convex towards the coronal direction, and the lip and cheek sides of the platform transfer region are concave towards the root direction; the platform transfer area is an asymmetric conical surface with the diameter gradually decreasing from top to bottom, and the soft tissue bearing area is connected to the bottom end of the platform transfer area and horizontally faces outwards; the upper end of the implant body part is also convex towards the coronal direction from the far middle side, concave towards the root direction from the labial and buccal side, and the upper section of the implant body part is provided with fine threads.

Preferably, the abutment portion comprises: the first transition zone and the second transition zone are arranged below the crown part; the first transition area is an asymmetric conical surface which is gradually enlarged from top to bottom, and the second transition area enables the first transition area and the platform transfer area to be in smooth transition.

Preferably, the height of the upper section of the implant body is 1-3mm, and the thread pitch is 0.1-1 mm.

Preferably, the proximal and distal sides of the bionic neck are different in height by 1-2mm relative to the labial and buccal sides.

Preferably, the lower section of the implant body is provided with a self-tapping groove with the depth of 1/3.

Preferably, the number of the self-tapping grooves is 2, and the self-tapping grooves are symmetrically arranged.

Preferably, the bottom end of the base portion is connected with an insertion portion, a base insertion groove is formed in the center of the bionic neck portion, and the insertion portion is inserted into the base insertion groove.

Preferably, the surface of the platform transfer zone may be provided with a coating for promoting adhesion of epithelium-binding hemidesmosomes.

Preferably, the bionic neck and the implant body are of a one-piece structure.

Compared with the prior art, the invention has the following beneficial effects:

(1) fully utilizes the outline shape of the alveolar bone after tooth extraction, increases the contact area of the implant and the alveolar bone and is beneficial to osseointegration.

(2) Promote the formation of physiological curve shape of gum to enhance aesthetic effect.

(3) Physiologic curvilinear platform transfer reduces microleakage and bone resorption.

(4) The tapered design reduces the risk of labial perforation during the planting process.

(5) The self-tapping blade and the self-tapping groove are arranged to collect bone fragments to participate in the formation of new bones and simultaneously facilitate clinical operation.

(6) The micro-thread on the upper section of the implant is arranged to reduce the bone absorption at the edge.

(7) The platform transfer zone is provided with a coating that promotes adhesion of the junctional epithelial hemidesmosomes.

Drawings

Fig. 1 is a schematic structural view of a bionic neck curve aesthetic implant of the present invention.

Fig. 2 is an implantation schematic view of the bionic neck curve aesthetic implant of the invention.

Fig. 3 is an exploded front view of the implant structure of the present invention.

Fig. 4 is an exploded left side view of the implant structure of the present invention.

Fig. 5 is a top view of the implant of the present invention.

Fig. 6 is an internal structure view of the implant of the present invention.

Detailed Description

The technical solution of the present invention is further described below with reference to the accompanying drawings and examples.

Fig. 1 is a schematic structural view of the bionic neck curve aesthetic implant according to the present invention. The implant comprises: an abutment part 30, a bionic neck part 10 and an implantation body part 20 are arranged from top to bottom in sequence. The biomimetic neck 10 comprises: a platform transfer region 11 and a soft tissue receiving region 12, wherein the proximal and distal sides of the platform are convex towards the coronal direction, and the lip and cheek sides of the platform are concave towards the root direction; the platform transfer area 11 is an asymmetric conical surface which is gradually reduced from top to bottom, and the soft tissue bearing area 12 is connected to the bottom end of the platform transfer area 11 and horizontally faces outwards; the upper end of the implant body 20 is also convex toward the coronal direction in the mesial-distal direction, concave toward the radicular direction in the labial-buccal direction, and the upper section 21 of the implant body 20 is provided with fine threads.

In fig. 1, the mesial-distal side is substantially the left and right sides, and the labial-buccal side is substantially the front and rear sides. The proximal and distal sides of the bionic neck 10 are convex towards the coronal plane, and the lips and cheeks are concave towards the root plane, so as to form a bionic curve. The bionic curve is used for simulating the shape of the natural gum. The bionic curve is a smooth and continuous curve. Similar to the bionic curve formed by the bionic neck 10, the upper end of the implant body part 20 also forms the bionic curve, the implant body part 20 is more matched with the outline of the alveolar bone by adopting a thread structure with the upper end in the bionic curve to replace the planar traditional implant neck design, and the alveolar bone and the bone height of the side wall near and far from the tooth extraction socket are utilized to a greater extent, so that the problem that the implant neck shape and the alveolar bone outline shape in the anterior dental implant implantation process are inconsistent with the alveolar bone shape after tooth extraction (immediate implantation) or after healing absorption (delayed implantation) is solved.

The abutment portion 30 includes: a crown 31, and a first transition zone 32 and a second transition zone 33 provided below the crown 31; the first transition area 32 is an asymmetric conical surface that is gradually enlarged from top to bottom, and the second transition area 33 makes the first transition area 32 and the platform transfer area 11 smoothly transition.

Fig. 2 is an implantation view of the implant of the present invention. Referring to fig. 1 and 2 together, the crown portion 31 of the abutment portion 30 is for connection with a crown, and a cutting groove 34 for positioning the crown is axially provided. The biomimetic neck 10 is used for aesthetic repair, being the gum penetrating region. The implant body 20 is implanted into an alveolar bone.

The external diameter of the crown part 31 is relatively small, and the first transition area 32 is gradually enlarged from top to bottom, so that the smooth transition between the abutment part 30 and the bionic neck 10 is realized. In use, soft tissue is located above the soft tissue receiving area 12, and alveolar bone is located below the soft tissue receiving area 12. The platform transfer zone 11 serves to support soft tissue. When the soft tissue is attached to the platform transfer region 11, the soft tissue receiving region 12 is horizontally outward, so that the soft tissue is blocked, and the soft tissue is favorably fixed to the platform transfer region 11.

Referring to fig. 2, the neck epithelium junction 41 is located above the soft tissue receiving region 12, and the soft tissue receiving region 12 may form a barrier to soft tissue. After the soft tissue is fixed in the platform transfer area 11, the bionic curve is beneficial to aesthetic repair of the gingival shape. Fig. 2 also shows the proximal/distal alveolar bone 42 and the labial alveolar bone 44, and the labial gingiva 43 located outside the labial alveolar bone 44.

In some embodiments, the bionic curve has a distance of 1-2mm between the lowest point and the highest point. The platform transfer zone 11 is set to have a height of about 1-3mm with reference to a biological width, and gradually shrinks from the top to the bottom to reach a boundary with the implant body 20, and has a diameter smaller than the upper section 21 of the implant body 20. The difference value of the widest part and the narrowest part of the bionic neck 10 is 0.1-2 mm.

The implant body 20 has a tapered configuration to accommodate anterior dental implant. The outer wall of the implant body 20 is provided with threads. Wherein, the outer wall of the upper section 21 of the implant body part 20 is provided with micro threads, so that the contact area of the implant body part 20 and bone tissues can be increased at the cortical bone edge with concentrated stress, and the bone absorption at the edge of the implant under functional load is reduced. In some embodiments, the upper section 21 of the implant body 20 has a height of 1-3mm and a pitch of 0.1-1 mm. The pitch of the outer wall of the middle section 22 of the implant body 20 is 1-2 mm. The height of the highest portion of the middle section 22 of the implant body 20 from the bottom end of the implant body 20 is about 6-12mm, and the diameter of the implant at the widest portion of the thread is about 3-6 mm. Two symmetrical self-tapping grooves are axially arranged at the lower section 23 of the implant body part 20, so that the bone wall can be cut by a self-tapping blade to self tap, and the implant body has a guiding function when being screwed in an operation, so that the implant body is convenient to implant. The depth of the self-tapping channel is about the diameter 1/3 of the implant body 20. When the clinical operation is convenient, the bone tissue fragments cut by the self-tapping blade enter the self-tapping groove to participate in the formation of new bone after the implantation.

Fig. 3 is a front view of the implant after structural disassembly. Fig. 4 is a left side view of the implant after structural disassembly. Fig. 5 is a top view of an implant. Fig. 6 is an internal structure view of an implant. An insertion portion 35 (see fig. 6) is connected to the bottom end of the abutment portion 30. The center of the bionic neck 10 is provided with a base station insertion groove 11C and a central screw hole 13 (see fig. 3 and 5) arranged in the base station insertion groove 11C, fig. 5 also shows a central screw hole outer diameter 11A, a central screw hole thread 11B, a bionic neck near-far middle outer diameter 12A and a bionic neck tongue side outer diameter 13A, and as can be seen from fig. 5, the cross section of the bionic neck 10 is circular. The insertion portion 35 is inserted into the abutment insertion groove 11C and then can be inserted into the central screw hole 13 by screwing the central screw 36. The integrated design of the platform transfer structure and the implant body part avoids secondary damage to soft tissues caused by mounting and dismounting the healing base platform, and creates better conditions for forming the soft tissues.

In some embodiments, the surface coating of the platform transfer region 11 may be designed to promote adhesion of the epithelium-binding hemidesmosome to the implant surface, thereby making the soft tissue binding stronger.

Aiming at the problem that the shape of the neck of the implant is inconsistent with the shape of the outline of the alveolar bone after tooth extraction (immediate implant) or after healing absorption (delayed implant) in the process of implanting the anterior dental implant, the invention adopts the neck thread structure of the bionic curve to replace the planar traditional implant neck design, is more consistent with the outline of the alveolar bone, and greatly utilizes the heights of the alveolar bone and the bone on the side wall near and far from the extraction socket.

The invention can ensure that the formed soft tissue also forms a similar 'neck curve' structure with the concave part at the lip and the cheek towards the root and the convex part at the near-far middle side towards the crown, and the appearance under the physiological state is better met on the basis of forming reliable seal of the gum epithelial cuff.

While the present invention has been described in detail with reference to the preferred embodiments, it should be understood that the above description should not be taken as limiting the invention. Various modifications and alterations to this invention will become apparent to those skilled in the art upon reading the foregoing description. Accordingly, the scope of the invention should be determined from the following claims.

Claims

1. A bionic neck curve aesthetic implant, characterized in that, comprising: an abutment portion (30), a bionic neck portion (10), and an implant body portion (20) sequentially arranged from top to bottom; the bionic neck portion (20); The neck (10) comprises: a platform transfer area (11) and a soft tissue receiving area (12), which are convex in the coronal side of the mesial and distal sides, and concave in the root side of the labial and buccal sides; As for the asymmetric conical surface with decreasing diameter, the soft tissue receiving area (12) is connected to the bottom end of the platform transfer area (11) and is horizontally outward; the upper end of the implant body (20) is also in the shape of a The mesio-distal side is convex coronally, the labial and buccal side is concave to the root, and the upper section (21) of the implant body (20) is provided with fine threads.

2 . The bionic neck curve aesthetic implant according to claim 1 , wherein the abutment part ( 30 ) comprises: a crown part ( 31 ); a transition zone (32) and a second transition zone (33); the first transition zone (32) is an asymmetric cone surface that increases from top to bottom, and the second transition zone (33) makes the first transition zone (33) A transition area (32) and the platform transfer area (11) smoothly transition.

3 . The bionic neck curve aesthetic implant according to claim 1 , wherein the upper section ( 21 ) of the implant body portion ( 20 ) has a height of 1-3 mm and a screw pitch of 0.1-1 mm. 4 .

4 . The bionic neck curved aesthetic implant according to claim 1 , wherein the mesio-distal side of the bionic neck ( 10 ) has a height difference of 1-2 mm relative to the labial and buccal sides. 5 .

5. The bionic neck curved aesthetic implant according to claim 1, wherein the lower section (23) of the implant body (20) is provided with a self-tapping depth of 1/3 of the diameter of the implant body groove.

6 . The bionic neck curve aesthetic implant according to claim 5 , wherein the self-tapping grooves are two and are symmetrically arranged. 7 .

7. The bionic neck curved aesthetic implant according to claim 1, wherein the bottom end of the abutment part (30) is connected with an insertion part (35), and the center of the bionic neck (10) is connected with an insertion part (35). A base insertion groove (11C) is provided, and the insertion portion is inserted into the base insertion groove (11C).

8. The bionic neck curved aesthetic implant according to claim 1, characterized in that, the surface of the platform transfer area (11) is provided with a coating for promoting the attachment of hemidesmosomes bound to the epithelium.

9 . The bionic neck curved aesthetic implant according to claim 1 , wherein the bionic neck ( 10 ) and the implant body portion ( 20 ) are an integral structure. 10 .