Bone tissue support and sealing device suitable for tooth extraction socket site preservation

Abstract

The utility model provides a bone tissue support and sealing device suitable for preserving tooth extraction fossa sites, which relates to the field of oral implantation and comprises a supporting support and a sealing body, the supporting support comprises a vertical support and two groups of horizontal cross-shaped supports, the two sets of horizontal cross supports are sequentially arranged in the axis direction of the vertical support, and the center connecting line of the two sets of horizontal cross supports is collinear with the central axis of the vertical support. The closed body is located on the upper portion of a tooth extraction socket alveolar ridge, the middle of the closed body is of a hollow structure and comprises a gingival upper portion, a gingival penetrating portion and an alveolar ridge top lower portion, the central axes of the gingival upper portion, the gingival penetrating portion and the alveolar ridge top lower portion are collinear, an inner hexagonal through hole is formed in the middle of the gingival upper portion, and four clamping notches are evenly formed in the alveolar ridge top lower portion around the central axis of the gingival upper portion. The sealing device can solve the problem of bone mass absorption of tooth extraction fossa, and is good in osteogenesis effect, good in wound sealing effect and suitable for later oral implant repair.

Description

TECHNICAL FIELD

[0001] The utility model relates to oral implantation technical field, concretely relates to a kind of bone tissue support and closure device suitable for tooth extraction nest site preservation. BACKGROUND

[0002] Clinically, periodontal disease, periapical disease and trauma factors often lead to tooth loss;The shape and volume of alveolar bone are determined by factors such as tooth loss, shape, growth direction and tooth axis. When the tooth is lost or extracted, the physiological process of hard tissue and soft tissue remodeling will lead to the reduction of alveolar ridge in height and width.

[0003] Tooth extraction site preservation, after the extraction of the patient's tooth, the alveolar bone will be significantly absorbed due to the loss of the tooth root, affecting the later implantation repair. To avoid poor healing of the alveolar ridge after tooth extraction and reduce bone absorption, a site preservation surgery is needed before implantation surgery. Currently, the common method of tooth extraction site preservation is to fill bone grafting material (mostly bone powder products such as Bio-Oss series) into the tooth extraction socket after tooth extraction. The material is mostly freeze-dried powder, granules or blocks after desensitization of xenogeneic bone. However, this method has the following disadvantages: 1. Insufficient space retention. The existing bone powder or collagen will deform or shift under the action of external forces such as chewing force and mucosal pressure, thereby affecting the spatial stability of the tooth extraction site and causing material loss. 2. After tooth extraction, the surrounding soft tissue often shrinks and collapses due to the lack of tooth support, not only changing the facial contour, but also challenging the subsequent implantation and repair process. Chinese patent document CN117959492A discloses a bone tissue support based on shape memory material and its preparation method. The patent produces a 4D printed electroactive porous bone tissue support based on shape memory polymer with "self-adaptive" function. It not only realizes defect filling and provides sufficient support for bone defects, but also realizes non-contact reciprocating deformation, has the characteristics of reversible deformation, controllable frequency, mild conditions and fatigue resistance, and helps to provide the periodic stress required by bone under microgravity conditions. However, this bone tissue support is mainly designed for orthopedic defects and applied to tooth extraction socket site preservation in dentistry. The bone tissue support promotes bone formation slowly and still has a certain amount of bone absorption, causing long waiting time for later implantation repair and insufficient bone mass recovery. At the same time, the closure method after implantation of the bone tissue support is to pull and suture or use a free flap to close the wound, which cannot completely close the wound, the bone height recovery is not good, additional wound is increased, and the risk of infection is high. UTILITY MODEL CONTENT

[0004] The utility model discloses a kind of bone tissue support and closure device suitable for tooth socket site preservation, which effectively solves the problem of bone absorption in tooth socket, and has good osteogenesis effect and good wound closure effect, suitable for postoperative oral implantation repair.

[0005] The utility model discloses the following technical scheme realizes the purpose:

[0006] A kind of bone tissue support and closure device suitable for tooth socket site preservation, including support support and closure body, support support includes a vertical support and two groups of horizontal cross supports, two groups of horizontal cross supports are sequentially arranged along the axis direction of vertical support and the center line of two groups of horizontal cross supports is collinear with the central axis of vertical support;Closure body is located on the upper part of tooth socket alveolar crest, and the middle part is hollow structure, including gum upper part, through gum part and alveolar crest top lower part, and their central axes are collinear, gum upper part is disc structure, and internal hexagon through-hole is arranged in the middle part;Through gum part and alveolar crest top lower part are large upper small lower conical cylinder structure, through gum part upper side is fixedly connected with gum upper part bottom surface and the outer surface of through gum part is smooth, alveolar crest top lower part is arranged at through gum part lower side and its outer surface is rough, and four clamping notches are evenly arranged around the central axis of gum upper part.

[0007] Further optimization based on the above scheme, the thickness of the gum upper part is 0.5-1mm, and the diameter is any one of 4mm, 5.5mm and 7mm (for incisors, premolars and molars respectively).

[0008] Further optimization based on the above scheme, the taper angle of the through gum part and the alveolar crest top lower part is 6°-10°, the height of the through gum part is 2-3mm, and the height of the alveolar crest top lower part is 0.5-1mm.

[0009] Further optimization based on the above scheme, the support support is made of polycaprolactone material by 3D printing, and the horizontal rods and vertical rods of the support support are square rods; in the support support, the length of the upper horizontal cross support is greater than the length of the lower horizontal cross support.

[0010] Further optimization based on the above scheme, the height of the vertical support is 9-15mm, and the square rod cross-sectional dimension of the vertical support is 0.2x0.2mm; the length of the upper horizontal cross support is 4-8mm, and the square rod cross-sectional dimension of the upper horizontal cross support is 0.4x0.4mm; the length of the lower horizontal cross support is 2-4mm, and the square rod cross-sectional dimension of the lower horizontal cross support is 0.2x0.2mm.

[0011] Further optimization based on the above scheme, the side length of the inner hexagonal through hole is 0.2-0.5mm; the limiting plug is arranged at the inner hexagonal through hole, the outer wall of the limiting plug is matched with the inner hexagonal through hole (i.e. arranged as a regular hexagon), a square blind hole is formed at the bottom of the limiting plug and matched with the vertical support, and the rotation limiting of the supporting support and the closed body is completed by the limiting plug.

[0012] Further optimization based on the above scheme, the clamping notch is shaped as The clamping notch is respectively clamped with the four ends of the upper horizontal cross support.

[0013] The following is the technical effect of the present application:

[0014] The supporting support composed of the vertical support and the two groups of horizontal cross supports not only provides certain mechanical strength and supports the closed body, but also ensures sufficient space in the tooth extraction socket, saves materials and avoids large-area adhesion between the closure device and the inner wall of the tooth extraction socket; through the arrangement of the inner hexagonal through hole and the clamping notch of the closed body, the stable connection between the closed body and the vertical support is realized, the closed body is prevented from falling off during the closure of the wound, and the closed body and the vertical support are convenient to disassemble, thereby facilitating the later implantation repair. In addition, the closed body with the conical structure is arranged, which perfectly matches the upper shape of the alveolar socket, thereby effectively realizing the closure and support of the tooth extraction socket, improving the adaptability of the closed body, and avoiding the phenomenon of soft tissue shrinkage and collapse around the tooth extraction socket. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is a structural schematic view of the device of the present application.

[0016] Figure 2 It is a schematic view of the device of the present application installed in the tooth extraction socket.

[0017] Among them, 11, vertical support; 12, upper horizontal cross support; 13, lower horizontal cross support; 21, upper part of gum; 210, inner hexagonal through hole; 22, gum-penetrating part; 23, lower part of alveolar crest; 230, clamping notch. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, not all the embodiments.

[0019] Embodiment 1:

[0020] The application discloses a bone tissue support and sealing device suitable for tooth extraction socket site preservation, which comprises a support support and a sealing body, wherein the support support comprises a vertical support 11 and two groups of horizontal cross supports which are sequentially arranged along the axis direction of the vertical support 11 (i.e. the two groups of horizontal cross supports are arranged on the upper side and the lower side) and the center line of the two groups of horizontal cross supports is collinear with the central axis of the vertical support 11 (as shown in the figure). Figure 1 The support support (including the horizontal cross supports on the upper side and the lower side of the vertical support 11) is made of polycaprolactone (PCL) material and is 3D printed, and the horizontal cross supports and the vertical support 11 are all square rods; the length of the upper side horizontal cross support 12 is greater than that of the lower side horizontal cross support 13. Specifically, the height of the vertical support 11 is 9-15 mm (determined according to the specific tooth extraction socket depth, so that the bottom end of the vertical support 11 abuts against the bottom surface of the tooth extraction socket, as shown in the figure), Figure 2 the cross-sectional dimension of the square rod of the vertical support 11 is 0.2*0.2 mm; the length of the upper side horizontal cross support 12 is 4-8 mm (selected according to the upper part width of the tooth extraction socket, so that the end of the upper side horizontal cross support 12 abuts against the inner wall of the upper part of the tooth extraction socket, as shown in the figure), Figure 2 the cross-sectional dimension of the square rod of the upper side horizontal cross support 12 is 0.4*0.4 mm; the length of the lower side horizontal cross support 13 is 2-4 mm (selected according to the lower part width of the tooth extraction socket, so that the end of the lower side horizontal cross support 13 abuts against the inner wall of the lower part of the tooth extraction socket, as shown in the figure), Figure 2 and the cross-sectional dimension of the square rod of the lower side horizontal cross support 13 is 0.2*0.2 mm.

[0021] The closed body is located on the upper part of the tooth socket alveolar ridge, and the middle part is provided with a hollow structure, including the supragingival part 21, the transgingival part 22 and the alveolar ridge top lower part 23, and the central axes of them (i.e. the supragingival part 21, the transgingival part 22 and the alveolar ridge top lower part 23) are collinear, the supragingival part 21 is a disc structure, and a hexagonal through hole 210 is formed in the middle part; the thickness of the supragingival part 21 is 0.5-1mm, and the diameter adopts any one of 4mm, 5.5mm and 7mm (respectively for incisors, premolars and molars, i.e. according to the type of tooth corresponding to the tooth socket). The transgingival part 22 and the alveolar ridge top lower part 23 are conical cylinder structures with large upper part and small lower part (the transgingival part 22 and the alveolar ridge top lower part 23 are integrated structures), the upper side of the transgingival part 22 is fixedly connected with the bottom surface of the supragingival part 21, and the outer surface of the transgingival part 22 is smooth, the alveolar ridge top lower part 23 is arranged at the lower side of the transgingival part 22, and the outer surface thereof is rough, and the alveolar ridge top lower part 23 is uniformly provided with four clamping notches 230 around the central axis of the supragingival part 21; the taper angle of the transgingival part 22 and the alveolar ridge top lower part 23 is 6°-10° (correspondingly set according to the actual taper of the upper part of the tooth socket), the height of the transgingival part 22 is 2-3mm, and the height of the alveolar ridge top lower part 23 is 0.5-1mm. The clamping notch 230 is in the shape of ” (as shown in Figure 1 or Figure 2 ), and the clamping notch 230 is correspondingly clamped with the four ends of the upper horizontal cross-shaped support 12 (i.e. the width of the clamping notch 230 is greater than the square rod cross-sectional dimension of the upper horizontal cross-shaped support 12).

[0022] The side length of the hexagonal through hole 210 is 0.2-0.5mm (to ensure that the vertical support 11 top end can penetrate the hexagonal through hole 210 and the vertical support 11 will not interfere with the rotation of the hexagonal through hole 210); a limiting plug is arranged at the hexagonal through hole 210, the outer wall of the limiting plug matches the hexagonal through hole (i.e. provided as a regular hexagon), a square blind hole is formed in the bottom of the limiting plug and matches the vertical support 11, and the rotation limiting of the supporting support and the closed body is completed by the limiting plug (in addition, the material of the limiting plug is consistent with the material of the closed body).

[0023] Working principle:

[0024] In use, firstly, according to the size of the tooth extraction socket of the patient, the size of the supporting bracket is 3D printed and the closed body to be used is selected; then, the 3D printed supporting bracket is placed at the tooth extraction socket of the patient: it is necessary to ensure that the bottom of the vertical bracket 11 is in contact with the bottom surface of the tooth extraction socket, and the four ends of the lower horizontal cross bracket 13 and the upper horizontal cross bracket 12 are respectively in abutment with the inner wall of the tooth extraction socket, so as to ensure that the supporting bracket is stably placed in the tooth extraction socket; then, the closed body is placed on the supporting bracket, it is necessary to ensure that the inner hexagonal through hole 210 corresponds to the upper end of the vertical bracket 11 and ensure that the upper end of the vertical bracket 11 passes through the inner hexagonal through hole 210, and it is also necessary to ensure that the bottom openings of the clamping notches 230 correspond to the four horizontal rods of the upper horizontal cross bracket 12 respectively; then, the closed body is rotated, so that the four horizontal rods of the upper horizontal cross bracket 12 are clamped in the right side protruding portions of the clamping notches 230 respectively; finally, the limiting plug is installed at the inner hexagonal through hole 210, and it is ensured that the top end of the vertical bracket 11 is inserted into the bottom square blind hole of the plug, so as to realize rotation limiting and avoid the problems such as falling off of the closed body during use.

[0025] Embodiment 2:

[0026] As another preferred embodiment of the utility model, on the basis of the scheme of the above-mentioned embodiment 1, the total width (namely the upper width) of the clamping notch 230 is 1mm, the bottom width is 0.6mm; the total height (namely the left side height) of the clamping notch 230 is 0.8mm, the height of the right edge (namely the right side protruding portion) is 0.5mm, and it is ensured that the upper horizontal cross bracket 12 can be clamped in the right side protruding portion of the clamping notch 230.

Claims

1. A bone tissue scaffolding and sealing device suitable for socket site preservation following tooth extraction, characterized in that: The support support includes a vertical support and two groups of horizontal cross supports, the two groups of horizontal cross supports are sequentially arranged along the axis direction of the vertical support, and the center line of the two groups of horizontal cross supports is collinear with the central axis of the vertical support; the closed body is located on the upper part of the tooth socket alveolar ridge, the middle part is hollow, including the upper gum, the gum penetrating part and the lower part of the alveolar ridge top, and their central axes are collinear, the upper gum is a disc structure, and a hexagonal through hole is formed in the middle part; the gum penetrating part and the lower part of the alveolar ridge top are conical cylinder structures with large upper and small lower, the upper side of the gum penetrating part is fixedly connected with the bottom surface of the upper gum, and the outer surface of the gum penetrating part is smooth, the lower part of the alveolar ridge top is arranged at the lower side of the gum penetrating part, and the outer surface thereof is rough, and four clamping notches are uniformly formed around the central axis of the upper gum.

2. A bone grafting and closure device for socket preservation according to claim 1, wherein: The thickness of the upper gum is 0.5-1mm, and the diameter is any one of 4mm, 5.5mm and 7mm.

3. The bone grafting and closure device for socket preservation according to claim 1, wherein: The taper angle of the gum penetrating part and the lower part of the alveolar ridge top is 6-10°, the height of the gum penetrating part is 2-3mm, and the height of the lower part of the alveolar ridge top is 0.5-1mm.

4. The bone grafting and closure device for socket preservation according to claim 1, wherein: The support support is made of polycaprolactone material by 3D printing, and the horizontal rods and vertical rods of the support support are square rods; in the support support, the length of the upper horizontal cross support is greater than that of the lower horizontal cross support.

5. A bone grafting and closure device for socket preservation according to claim 4, wherein: The height of the vertical support is 9-15mm, and the cross-sectional dimension of the square rod of the vertical support is 0.2x0.2mm; the length of the upper horizontal cross support is 4-8mm, and the cross-sectional dimension of the square rod of the upper horizontal cross support is 0.4x0.4mm; the length of the lower horizontal cross support is 2-4mm, and the cross-sectional dimension of the square rod of the lower horizontal cross support is 0.2x0.2mm.

6. The bone grafting and closure device for socket preservation according to claim 1, wherein: The side length of the hexagonal through hole is 0.2-0.5mm; a limiting plug is arranged at the hexagonal through hole, the outer wall of the limiting plug matches the hexagonal through hole, a square blind hole is formed in the bottom of the limiting plug, and the square blind hole matches the vertical support.

7. The bone grafting and closure device for socket site preservation according to claim 1, wherein: The clamping notches are in the shape of and clamp the four ends of the upper horizontal cross support respectively.

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