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Piston-shaped bone repairing support and application thereof

A bone repair and piston technology, applied in the field of stents, can solve the problems of hindering new bone and sinus mucosa crawling replacement repair, material displacement and discharge, which have not been reported, so as to promote vascularization and new bone formation, prevent movement, good fix effect

Inactive Publication Date: 2010-01-20
SHANGHAI NINTH PEOPLES HOSPITAL AFFILIATED TO SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There are two main deficiencies in the current repair method: ① One or several pieces of material are bridged on the orbital bone wall, which is difficult to fix, and material displacement and discharge are prone to occur; Contact anastomosis hinders the crawling replacement repair of new bone and sinus mucosa, increasing the possibility of rejection and infection
However, there is no report on the piston-shaped bone repair scaffold

Method used

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  • Piston-shaped bone repairing support and application thereof
  • Piston-shaped bone repairing support and application thereof
  • Piston-shaped bone repairing support and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0039] Please refer to Figure 1A , Figure 1B .

[0040] Figure 1A , Figure 1B It is a piston-shaped bone repair bracket, which consists of a bracket top 1 and a bracket bottom 2, the shape of the bracket top 1 and the bracket bottom 2 is circular, the diameter of the bracket top 1 is 10 mm, and the diameter of the bracket bottom 2 is 12 mm , the thickness of the top 1 of the bracket is 1 mm, and the thickness of the bottom 2 of the bracket is 2 mm. The preparation method of the piston-shaped bone repair bracket is as follows: use a resin model to carry out silicone rubber to take a negative mold, stir the β-tricalcium phosphate powder into a paste, inject it into the mold, put it in a drying oven at 80°C for 12 hours, and then Perform microwave sintering for one-shot molding. Co 60 (25kGy) is sterilized and individually packaged for use.

Embodiment 2

[0042]Using computer-aided design and manufacturing technology, the piston-shaped bone repair scaffold is prepared according to the shape of the specific defect. Contents include: design of Plug (piston)-shaped bone repair bracket; precise prefabrication of piston-shaped bone repair bracket according to the specific shape of bone defect; design of orbital wall bone repair with special shape through calculation of orbital volume and surgical simulation Scaffolds; methods for bone repair scaffolds complexed with cells or (and) growth factors in vitro.

[0043] 1. Design of Bone Repair Scaffold

[0044] Design the material as a "Plug" pattern (see figure 2 ), consisting of two parts: the top of the bracket 1 and the bottom of the bracket 2: the top of the bracket 1 is inserted into the bone defect, and the bottom of the bracket 2 covers the normal bone wall. The main function of the top 1 of the bracket is to fill the bone defect and make close contact with the broken end of t...

Embodiment 3

[0055] Design and Fabrication of Bone Repair Scaffold for Repairing Canine Orbital Wall Defects

[0056] 1. Establishment of canine medial orbital wall defect model

[0057] Select the skin incision of the lower eyelid and inner canthus, separate the subcutaneous tissue and muscles, and fully expose the medial wall of the orbit. The periosteum is incised and stripped with a dissector. A 10mm-diameter orthopedic trephine was used to create a circular full-thickness defect with a diameter of 10mm at the ethmoid cardboard on the medial orbital wall, destroying the periosteum and orbital septum, and causing orbital contents to incarcerate and herniate into the ethmoid sinus.

[0058] 2. Design and manufacture of "piston"-shaped bone repair bracket according to canine orbital wall defect

[0059] The shape of the bone defect in the dog’s orbital wall is a circle with a diameter of 10 mm. According to the design principle of the bone repair bracket, the orbital wall repair materia...

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Abstract

The invention relates to a piston-shaped bone repairing support and application thereof. The piston-shaped bone repairing supporting consists of a support top and a support bottom, wherein thickness of the support top is between 0.5 and 1.5mm; the thickness of the support bottom is between 1 and 2mm; and the periphery of the support bottom is 1 to 3mm wider than the support top. The bone repairing support has the advantages that: when the piston-shaped bone repairing support is used for repairing defects of orbital wall and harnpan, the support material can be inserted into the position of the bone defect, and is matched excellently with a bone stump so as to facilitate the creeping and the replacement of a new bone towards the material; and meanwhile, the bone repairing support can be fixed excellently, avoids the movement of the support material, and solves the problem that materials on the positions of the orbital wall and the harnpan are difficult to fix.

Description

technical field [0001] The invention relates to a bracket, in particular to a bone repair bracket and its application. Background technique [0002] There are many types of materials currently used for craniofacial bone tissue repair, the most commonly used are polymer porous polyethylene, hydroxyapatite, tricalcium phosphate and titanium metal, etc., these materials have good biocompatibility and bio Safety, has been clinically used for many years. Based on the complex and irregular shape of craniofacial bones, these artificial materials are preformed into different shapes according to the corresponding repair sites, such as orbital edge implants, nasal implants, ear implants, temporal implants, lower eyelid implants, etc. plate implants etc. When the doctor uses these prefabricated bone repair materials to repair the corresponding parts, there is no need to trim the material or only a simple trim, and the repair effect can be satisfactory, which is convenient for the sur...

Claims

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Application Information

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IPC IPC(8): A61F2/82A61L27/02A61L27/12A61L27/14A61L31/02A61L31/04A61B17/56A61F9/00
Inventor 范先群周慧芳
Owner SHANGHAI NINTH PEOPLES HOSPITAL AFFILIATED TO SHANGHAI JIAO TONG UNIV SCHOOL OF MEDICINE
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