In recent years, with the increase in the incidence of industrial trauma and traffic accidents, more and more patients with orbital fractures. The bone in the orbital wall is weak, and bone defects are prone to occur after fractures. Biological materials need to be used to replace the defective bone tissue to reconstruct the orbital structure.

In the past, the materials used to repair the orbit were mainly autogenous bone, hydroxyapatite, bioactive glass, and silica gel. However, they all have defects to varying degrees and are prone to complications such as displacement and infection. In the early 1990's, titanium alloys began to be used in the repair of orbital wall fractures and defects, and were favored for their excellent characteristics.

Advantages of titanium alloy as orbital repair material

1. Good biocompatibility

There is a dense inert oxide film on the surface of titanium alloy. It is this layer of oxide film that makes titanium alloy have good biocompatibility, which can reduce the probability of infection after implantation in human body.

2, light weight

Titanium alloy has high strength and light weight. It can reduce the load on the human body after being implanted into the human body, and also reduces the operating load of medical staff.

3.Low elastic modulus

Titanium alloy has the modulus of elasticity closest to the natural bone of the human body and excellent wear resistance and corrosion resistance. It can be processed into a shape that matches the edge of the bone defect, and it is not easy to loosen after healing.

4, easy to review

Titanium alloy is non-magnetic and has almost no effect on CT, MRI and other scans. The imaging quality is good and it is convenient for review after surgery.

Problems of Titanium Alloy as Orbital Repair Material

Since titanium mesh was successfully applied to orbital repair for the first time in 1990, titanium mesh has been used as a filling and internal fixation material for the repair of orbital wall and orbital floor defects. However, the irregular shape and smooth surface of the titanium mesh are easily covered by fibrous tissue, which may promote the high-density distribution and adhesion of inflammatory cells and cause dissolution of adjacent bone.

Because the edges of the titanium mesh are sharp and have certain hardness, when the surgical incision is small, the titanium mesh is easily obstructed by the surrounding tissue, it is difficult to insert it into a predetermined position, and even iatrogenic damage is easily caused during the insertion process. In addition, because the titanium mesh is thin, it is impossible to correct the invagination of the eyeball which is prone to occur in the late stage of orbital and midfacial fractures.

The structure of the orbit is too complicated. Although there have been many studies in recent years dedicated to repairing orbital fracture defects, the optimal repair standard has not been reached. With the rapid development of medical technology, I believe this problem will be overcome!

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