Bone plate, orthopaedic fixation device and preparation method thereof

Abstract

The invention discloses a bone plate, an orthopaedic fixation device and a preparation method thereof. The bone plate comprises a first surface for contacting with human bone, and the bone plate further comprises at least one receiving part for receiving a fixation piece, and the material of the bone plate is silicon nitride ceramic. In the above manner, the invention can improve the biocompatibility of the orthopaedic fixation device.

Description

technical field [0001] The invention relates to the technical field of orthopedics, in particular to a bone plate, an orthopedic fixation device and a preparation method thereof. Background technique [0002] Fracture is a common clinical disease in orthopedics. In order to connect broken bones, fixation devices are needed. Existing orthopedic fixation devices are generally made of metal materials, because metal fixation devices have high strength, low cost, and mature technology. Features, is the main product at present. [0003] However, during the long-term research and development process, the inventors of the present application found that the fixing device made of metal still has certain defects. First, the fusion between metal and human primary bone is poor. This mismatch of mechanical properties will lead to uneven stress distribution, which will cause relative movement between the fixation device and the bone under load, resulting in loosening or dislocation of the...

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Problems solved by technology

[0003] However, in the long-term research and development process, the inventor of the present application found that the metal fixing device still has certain defects.

First, the fusion of metal and human primary bone is poor. This mismatch of mechanical properties will lead to uneven stress distribution, which will cause relative movement between the fixation device and the bone when loaded, resulting in loosening or dislocation of the fixation device.

At the same time, the stress shielding effect can also lead to osteoporosis, bone resorption or bone atrophy, prone to secondary fractures

In addition, due to the lack of sufficient mechanical stress stimulation, it is not easy to form callus at the fracture site, which makes the healing period longer; moreover, the rigid fracture internal fixation will also delay the initial bone healing process

Second, the fusion of metal and human tissue is poor

For example, metal chromium, nickel, mercury, gold, platinum, barium, etc. can cause allergic reactions, such as anaphylactic shock; cobalt, chromium, and nickel are haptens; Fixtures have been reported to cause malignant tumors in animals and humans; metal fixation materials can also cause local inflammation and tissue necrosis

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