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The degradation process of absorbable bone plates:
Absorbable bone plates are mainly made of biodegradable materials, and their degradation process is closely related to the type of material. Take polylactic acid (PLA) as an example. This material degrades through hydrolysis in a water medium, causing the ester bonds to break, thereby generating oligomers or monomers, which are eventually excreted from the body through phagocytosis or metabolism. There are two modes in the degradation process: bulk degradation and surface degradation. Bulk degradation will cause the degradation of the entire implant, resulting in a decrease in the molecular weight and mechanical strength of the implant with the extension of degradation time. Surface degradation is confined to the surface of the implant. The mass of the implant decreases with the extension of degradation time, but the molecular weight and mechanical properties remain relatively unchanged.
Advantages of absorbable bone plates:
Avoiding secondary surgery: The absorbable bone plate gradually decomposes and is absorbed in the body, eliminating the need for secondary surgery to remove it. This reduces the risk of postoperative infection and secondary surgery, and alleviates the patient’s suffering.
High biocompatibility: The absorbable bone plate material has high compatibility with human tissues and will not cause rejection reactions, thus avoiding the risk of adverse reactions.
Excellent mechanical properties: Absorbable bone plates have good strength and rigidity, which can maintain the stability of the fracture site and help promote fracture healing.
Easy operation: The absorbable bone plate has good plasticity and cuttability. Doctors can cut it into the required shape as needed, adapting to various fracture sites, and the operation is simple and convenient.
Reduce the risk of infection: As the absorbable bone plate does not need to be removed again after use, the number of surgeries is reduced, thereby lowering the risk of infection.
Promoting bone healing: Absorbable bone plates can provide a suitable environment and support to accelerate the regeneration and healing of bone tissue. In the early stage of fracture healing, absorbable bone plates have good mechanical properties, ensuring reliable fixation of fractures. As fracture healing progresses and the material gradually degrades, the mechanical properties gradually decline, gradually transferring stress from the material to the bone tissue, avoiding the effect of stress shielding and accelerating fracture healing.
It does not affect imaging examinations: After the absorbable bone plate surgery, CT/MRI imaging does not produce artifacts or obstructions, does not block radiation, does not affect postoperative radiotherapy for tumor patients, has no magnetic field restrictions, and does not cause MRI safety issues.