CN114712017A - Special fixture assembly for bone block - Google Patents

Abstract

The invention relates to the technical field of medical devices, in particular to a fixture assembly special for bone blocks, which comprises a fixing rod, wherein a first thread part is arranged on the contact side of an autologous alveolar bone of the fixing rod; a second threaded part is arranged on the contact side of the bone graft block of the retaining rod; a smooth transition part is arranged between the first threaded part and the second threaded part; the fixture rod further comprises an umbrella-shaped connecting part, wherein the umbrella-shaped connecting part is provided with an accommodating groove, and the extending direction of the accommodating groove is consistent with the axial direction of the fixture rod; the nail is matched with the cap body part and the fixing part; the retention element is engaged with the receiving groove. The invention not only can fix the bone block, but also can play a certain role in supporting and stabilizing the osteogenic space.

Description

Special fixture assembly for bone block

Technical Field

The invention relates to the technical field of medical devices, in particular to a fixture assembly special for bone blocks.

Background

At present, dental implantation becomes the preferred repair mode for patients with loss, and sufficient bone mass plays an important role in the long-term prognosis effect of dental implantation surgery. However, clinical defects of soft and hard tissues of jawbone caused by trauma, inflammation, tumor resection, congenital diseases and physiological factors lead to serious deficiency of alveolar bone mass, which brings a challenge to dental implant repair. Therefore, how to effectively increase the alveolar bone mass, especially the vertical bone mass, is a major clinical problem to be solved by the implant doctors.

Autologous bone grafting is considered the gold standard for vertical bone augmentation. However, autologous bone grafting requires the removal of autologous bone tissue, opening up a second surgical site to be rejected by most patients. Compared with autologous bone blocks, freeze-drying treatment of allogeneic bone has obvious advantages: (1) the bone substitute has no immunogenicity, does not cause rejection reaction, but retains the bone induction activity, can induce the formation of new bones and keeps the functions similar to those of autologous bones; (2) selecting proper allogeneic bone blocks according to the size of the bone defect part, and not being limited by a supply area; (3) the allogeneic bone block has the same bone regeneration space for maintaining the same bone grafting area as the autologous bone block; (4) since no donor area is needed, there are no complications such as donor area infection when using allogeneic bone; (5) the wound is reduced, and the postoperative reaction of the patient is obviously reduced, such as swelling, pain and the like; (6) simplifies the clinical operation procedure, shortens the treatment time and ensures better experience of patients.

Therefore, at present, the allogeneic bone blocks are widely applied clinically, and have obvious curative effect and high acceptance of doctors and patients. However, when the allogeneic bone blocks are clinically used for bone augmentation, special tools are lacked, so that the clinical operation difficulty is greatly increased, the clinical operation time is prolonged, and the technical sensitivity is improved. The freeze-dried allogeneic bone block has osteoinductive property, and can maintain a certain osteogenic space after being implanted. After the bone block is transplanted, a retention pin is needed to retain the bone block in the bone grafting area. Meanwhile, the freeze-dried allogeneic bone is absorbed quickly, and when new bone is not completely formed, bone blocks begin to be absorbed, so that the formation effect of the new bone is influenced.

Disclosure of Invention

In view of the above disadvantages of the prior art, it is an object of the present invention to provide a fixture assembly for bone mass, which not only can fix the bone mass, but also can stabilize the osteogenic space to solve the problems of the prior art.

In order to achieve the above and other related objects, the present invention provides a fixture assembly for bone block, comprising a fixing rod, a first screw part disposed on the contacting side of the self-alveolar bone of the fixing rod; a second threaded part is arranged on the contact side of the bone grafting block of the retaining rod; a smooth transition part is arranged between the first threaded part and the second threaded part; the fixture rod further comprises an umbrella-shaped connecting part, wherein an accommodating groove is formed in the umbrella-shaped connecting part, and the extending direction of the accommodating groove is consistent with the axial direction of the fixture rod; the nail is characterized by further comprising a fitting nail, wherein the fitting nail comprises a cap body part and a retaining part which are connected; the retention piece is matched with the accommodating groove.

In some embodiments of the present invention, the retention element has an external thread, and the receiving groove has an internal thread matching with the retention element.

In some embodiments of the invention, the umbrella-shaped connecting portion has a diameter that gradually increases from an end away from the retaining rod to an end close to the retaining rod.

In some embodiments of the invention, the diameter of the retention rod increases from the end distal to the umbrella-shaped connection portion to the end proximal to the umbrella-shaped connection portion.

In some embodiments of the invention, the cross-sectional shape of the receiving groove is square or circular; the retention piece is square or round matched with the shape of the accommodating groove.

In some embodiments of the present invention, the receiving groove is provided at a center of a cross section of the umbrella-shaped connecting portion and extends in an axial direction of the umbrella-shaped connecting portion.

In some embodiments of the invention, the angle between the running surface of the thread in the first threaded portion and the radial direction of the retention rod is between 10 ° and 30 °.

In some embodiments of the present invention, the pitch of the first threaded portion is 0.1 to 0.3 mm.

In some embodiments of the present invention, the first threaded portion has a length of 2 to 4 mm.

In some embodiments of the invention, the angle between the running surface of the thread in the second threaded portion and the radial direction of the retention rod is between 10 ° and 30 °.

In some embodiments of the present invention, the pitch of the second thread part is 0.1 to 0.3 mm.

In some embodiments of the present invention, the second threaded portion has a length of 2 to 4 mm.

In some embodiments of the invention, the cap portion is provided with a slot.

In some embodiments of the invention, the first threaded portion is self-tapping.

In some embodiments of the invention, the retention bar has a length of 10-18 mm.

In some embodiments of the invention, the retention rod has a diameter of 1-2 mm.

In some embodiments of the invention, the diameter of the umbrella-shaped connecting part is 4-6 mm.

In some embodiments of the present invention, the thickness of the umbrella-shaped connecting part is 1.5 to 2.5 mm.

In some embodiments of the invention, the side length of the accommodating groove is 0.5-1.5 mm.

In some embodiments of the invention, the cap body has a diameter of 2 to 3 mm.

In some embodiments of the present invention, the cap body has a thickness of 1.5 to 2.5 mm.

In some embodiments of the invention, the length of the fitting nail is 3-5 mm.

Drawings

Fig. 1 is a schematic view showing a split structure of a fixture assembly for bone block exclusive use according to the present invention.

Fig. 2 is a front view schematically illustrating the fixture assembly for bone blocks according to the present invention.

Fig. 3 is a schematic view illustrating the structure of a receiving groove of an embodiment of the fixture assembly for bone exclusive use according to the present invention.

Fig. 4 is a view illustrating the structure of a groove in an embodiment of the fixture assembly for bone fragments according to the present invention.

Element numbers in the figures:

1 Retention rod

11 first threaded portion

12 second screw part

13 smooth transition

2 umbrella-shaped connecting part

21 accommodating groove

3 fitting nail

31 cap body part

311 open slot

32 retention element

Detailed Description

In the description of the present invention, it should be noted that the structures, ratios, sizes, and the like shown in the drawings attached to the present specification are only used for matching with the disclosure of the specification, so as to be understood and read by those skilled in the art, and are not used to limit the conditions that the present invention can be implemented, so that the present invention has no technical essence, and any structural modification, ratio relationship change, or size adjustment should still fall within the scope of the technical disclosure of the present invention without affecting the function and the achievable purpose of the present invention. While the terms "central," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like refer to orientations and positional relationships illustrated in the drawings, which are used for convenience in describing the invention and to simplify the description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be considered limiting of the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In addition, in the description of the present invention, "a plurality" means two or more unless otherwise specified.

As shown in FIGS. 1 and 2, an embodiment of the present invention provides a fixture assembly for bone blocks, which includes a fixing rod 1, the fixing rod 1 having a first screw portion 11 on an autogenous alveolar bone contact side; in use, the first threaded portion 11 is screwed into the autologous alveolar bone. The contact side of the bone graft of the retaining rod 1 is provided with a second thread part 12, and the second thread part 12 is screwed into the bone graft to fix the bone graft. A smooth transition part 13 is arranged between the first thread part 11 and the second thread part 12; still include umbelliform connecting portion 2, as shown in fig. 3, be equipped with holding tank 21 on the umbelliform connecting portion 2, the extending direction of holding tank 21 is unanimous with the position fixing pole 1 axial direction. The nail is characterized by further comprising a matched nail 3, wherein the matched nail 3 comprises a cap body part 31 and a fixing piece 32 which are connected; the retention element 32 is engaged with the receiving groove 21. In use, the retention element 32 enters the receiving groove 21, and usually, the outer diameter of the retention element 32 is equal to the inner diameter of the receiving groove 21, or the outer diameter of the retention element 32 is slightly larger than the inner diameter of the receiving groove 21, so that the retention element and the receiving groove can be well fixed when connected.

The special device for the bone blocks is placed in a special tool box clinically and is used clinically after being sterilized. When the fixture assembly special for the bone block is clinically used, the bone block is clamped by a bone holder according to the size of the bone block required by a patient, then the bone block is cut into the required size by a cutter, and the bone block is trimmed into the required shape according to the shape of the bone-lacking area. According to the needs of bone block fixation, after selecting a proper position in the self alveolar bone to punch, the bone mass is increased according to the needs and the thickness of the transplanted bone block is determined to select a proper fixture component special for the bone block and the depth of the fixture rod screwed into the bone tissue in the fixture component special for the bone block. When the fixture is used, the screwdriver bit is placed in the accommodating groove 21 of the umbrella-shaped connecting part 2, the fixture is screwed in with force, the first thread part 11 of the fixture rod can be screwed into the autologous alveolar bone, and the second thread part 12 is used for being screwed into the bone graft block to fix the bone graft block. A smooth transition part 13 is arranged between the first thread part 11 and the second thread part 12 and is used for accommodating bone meal; covering the membrane, and finally placing the fitting nail 3 for retaining the membrane, as shown in fig. 4, the cap portion 31 of the fitting nail 3 is provided with a slot 311. The special nail holder is arranged in the groove, so that the fixing piece 32 is screwed into the umbrella-shaped connecting part 2 through the accommodating groove 21, and the matching nail 3 is connected with the umbrella-shaped connecting part 2 to fix the membrane. The film is typically thin and the thickness of the retention element 32 need only be slightly greater than the thickness of the receiving channel 21. Wherein the thickness direction coincides with the axial direction of the retention rod 1. After 8 months, the special fixture assembly is removed.

In the fixture assembly special for bone blocks provided by the invention, the fixing piece 32 is provided with an external thread, and the accommodating groove 21 is internally provided with an internal thread matched with the fixing piece 32. The cooperation of internal and external screw thread can make to join in marriage during nail 3 can pass through holding tank 21 of retaining piece 32 screw in umbrella shape connecting portion 2, and then makes to join in marriage nail 3 and be connected with umbrella shape connecting portion 2 to realize the fixed of membrane.

In the fixture assembly for bone fragment specific provided by the present invention, as shown in fig. 1 and 2, the diameter of the umbrella-shaped connection part 2 is gradually increased from the end far from the retention rod 1 to the end near the retention rod 1. The contact area with the pre-implanted bone graft is larger, and the supporting area is larger, thereby reducing the use amount of the fixture component special for alveolar bone augmentation.

In the fixture assembly special for bone block provided by the invention, the contact area of the cap body part 31 and the biological membrane is also large enough, and the supporting area is larger.

In the fixture assembly for bone block provided by the present invention, the shape of the receiving groove 21 is not limited in general, for example, the cross-sectional shape of the receiving groove 21 may be square or circular. The retention element 32 is square or circular to match the shape of the receiving groove 21, that is, when the receiving groove 21 is square, the retention element 32 is also square.

In the fixture assembly special for bone block provided by the invention, the accommodating groove 21 is arranged at the center of the cross section of the umbrella-shaped connecting part 2 and extends along the axial direction of the umbrella-shaped connecting part 2.

In the fixture assembly special for bone fragments provided by the invention, as shown in fig. 1 and 2, the diameter of the fixing rod 1 is gradually increased from one end far away from the umbrella-shaped connecting part 2 to one end close to the umbrella-shaped connecting part 2. And the structure is more stable.

In the fixture assembly special for bone blocks provided by the invention, as shown in fig. 1 and 2, the included angle between the working surface of the thread in the first thread part 11 and the radial direction of the retaining rod 1 is 10-30 degrees. Such a design may facilitate implantation of the fixture assembly and reduce frictional heat generation.

In the fixture assembly for bone block provided by the present invention, the pitch is the distance between the adjacent 2 threads along the axial direction of the fixture rod 1, and the pitches of the first thread part 11 are equal. The pitch of the first thread part 11 is 0.1-0.3 mm. The design enables the first thread part 11 to have a certain squeezing effect on the alveolar bone during screwing, and ideal initial stability is obtained.

In the fixture assembly special for bone blocks, the length of the first thread part 11 is 2-4 mm. In some embodiments, the length of the first threaded portion 11 may also be 2-3 mm; or 3-4 mm, etc.

In the fixture assembly special for bone blocks provided by the invention, as shown in fig. 1 and 2, the included angle between the working surface of the thread in the second thread part 12 and the radial direction of the retaining rod 1 is 10-30 degrees. Such a design may facilitate implantation of the retention membrane tack and reduce frictional heat generation.

In the fixture assembly for bone block provided by the present invention, the pitch is the distance between the adjacent 2 threads along the axial direction of the fixture rod 1, and the pitches of the second thread part 12 are equal. The pitch of the second thread part 12 is 0.1-0.3 mm. This design allows the second threaded portion 12 to provide some compression of the bone graft during the screwing process, resulting in the desired initial stability.

In the fixture assembly for bone fragments provided by the present invention, the length of the second thread portion 12 is 2 to 4 mm. In some embodiments, the length of the second threaded portion 12 may also be 2-3 mm; or 3-4 mm, etc.

In the fixture assembly special for the bone block, the length of the fixing rod 1 can be 10-18 mm; in some embodiments, the length of the retention bar 1 may be, for example, 10-12 mm, 12-14 mm, 14-16 mm, or 16-18 mm. The diameter of the retention rod 1 is 1-2 mm, 1-1.5 mm, or 1.5-2 mm and the like.

In the fixture assembly special for bone block provided by the invention, the fixing rod 1 is provided with a smooth transition part 13 except the first thread part 11 and the second thread part 12 for placing bone powder. The length of the section is 3-8 mm.

In the fixture assembly special for the bone block, the diameter of the umbrella-shaped connecting part 2 can be 4-6 mm. In some embodiments, the diameter of the umbrella-shaped connecting portion 2 may also be 4-5 mm, or 5-6 mm, etc.

In the fixture assembly special for the bone block, the thickness of the umbrella-shaped connecting part 2 can be 1.5-2.5 mm. In some embodiments, the thickness of the umbrella-shaped connecting part 2 can be 1.5-2 mm; or 2-2.5 mm.

In the fixture assembly for bone fragments provided by the present invention, the side length of the accommodating groove 21 may be 0.5-1.5 mm. In some embodiments, the side length of the accommodating groove 21 may also be 0.5-1.0 mm; or 1.0 to 1.5 mm.

In the fixture assembly special for bone block provided by the invention, the thickness of the accommodating groove 21 can be 1.5-2.5 mm. In some embodiments, the thickness of the accommodating groove 21 may also be 1.5-2 mm; or 2-2.5 mm.

In the fixture assembly for bone block provided by the present invention, the diameter of the cap body 31 may be 2-3 mm. In some embodiments, the cap body 31 may also have a diameter of 2-2.5 mm; or 2.5 to 3 mm.

In the fixture assembly for bone block provided by the present invention, the thickness of the cap portion 31 may be 1.5-2.5 mm. In some embodiments, the thickness of the cap body 31 may also be 1.5-2.0 mm; or 2.0 to 2.5 mm.

In the fixture assembly special for the bone block, the length of the fitting nail 3 can be 3-5 mm. In some embodiments, the length of the fitting nail 3 can be 3-4 mm; or 4-5 mm.

In the fixture assembly for bone block of the present invention, as shown in fig. 4, the cap 31 has a slot 311 for engaging with a special fixture.

In the fixture assembly special for the bone block, the fixture assembly special for the bone block is made of titanium alloy.

In conclusion, the fixture assembly special for bone blocks can be used for fixing autologous bone blocks and allogeneic bone blocks and stabilizing artificial bone powder. Has the following advantages:

(1) the umbrella part is expanded, and the supporting area is larger, thereby reducing the use number of the fixture components.

(2) The fixture assembly can maintain the spatial stability of the bone grafting area and improve the efficiency of bone augmentation.

(3) The fixture assembly can effectively retain bone block, stabilize bone powder and retain biomembrane, has excellent effect and is beneficial to the formation of new bone.

In conclusion, the present invention effectively overcomes various disadvantages of the prior art and has high industrial utilization value.

The foregoing embodiments are merely illustrative of the principles and utilities of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or change the above-mentioned embodiments without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which can be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. The fixture component special for the bone block is characterized by comprising a retaining rod (1), wherein a first threaded part (11) is arranged on the contact side of the self alveolar bone of the retaining rod (1); a second thread part (12) is arranged on the contact side of the bone graft of the retaining rod (1); a smooth transition part (13) is arranged between the first threaded part (11) and the second threaded part (12); the fixing rod is characterized by further comprising an umbrella-shaped connecting part (2), wherein an accommodating groove (21) is formed in the umbrella-shaped connecting part (2), and the extending direction of the accommodating groove (21) is consistent with the axial direction of the fixing rod (1); the nail (3) comprises a cap body part (31) and a retaining piece (32) which are connected; the retention piece (32) is matched with the accommodating groove (21).

2. The fixture assembly as claimed in claim 1, wherein the retainer (32) has external threads, and the receiving groove (21) has internal threads for engaging with the retainer (32).

3. The fixture assembly as claimed in claim 1, wherein the umbrella-shaped connecting portion (2) has a diameter gradually increasing from an end away from the rod (1) to an end close to the rod (1).

4. The fixture assembly for bone fragments as claimed in claim 1, wherein the diameter of the rod (1) is gradually increased from an end far from the umbrella-shaped coupling portion (2) to an end near to the umbrella-shaped coupling portion (2).

5. The fixture assembly as claimed in claim 1, wherein the receiving groove (21) has a square or circular cross-sectional shape; the retention piece (32) is square or round and is matched with the shape of the accommodating groove (21).

6. The fixture assembly as claimed in claim 1, wherein the receiving groove (21) is formed at the center of the cross-section of the umbrella-shaped coupling portion (2) and extends in the axial direction of the umbrella-shaped coupling portion (2).

7. The fixture assembly as claimed in claim 1, wherein the angle between the working surface of the thread of the first threaded portion (11) and the radial direction of the retention rod (1) is 10 ° to 30 °; the pitch of the first thread part (11) is 0.1-0.3 mm; the length of the first thread part (11) is 2-4 mm.

8. The fixture assembly as claimed in claim 1, wherein the angle between the working surface of the thread in the second threaded portion (12) and the radial direction of the retention rod (1) is 10 ° to 30 °; the pitch of the second thread part (12) is 0.1-0.3 mm; the length of the second thread part (12) is 2-4 mm.

9. The fixture assembly as claimed in claim 1, wherein the cap body (31) is provided with a slot (311).

10. The fixture assembly as claimed in claim 1, wherein the first threaded portion (11) is a self-tapping thread;

and/or the length of the retaining rod (1) is 10-18 mm;

and/or the diameter of the retaining rod (1) is 1-2 mm;

and/or the diameter of the umbrella-shaped connecting part (2) is 4-6 mm;

and/or the thickness of the umbrella-shaped connecting part (2) is 1.5-2.5 mm;

and/or the side length of the accommodating groove (21) is 0.5-1.5 mm;

and/or the diameter of the cap body part (31) is 2-3 mm;

and/or the thickness of the cap body part (31) is 1.5-2.5 mm;

and/or the length of the fitting nail (3) is 3-5 mm.

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