Compression osteosynthesis heals fracture mandible by:
**Core Concept**
Compression osteosynthesis is a surgical technique used to treat fractures, particularly in the mandible (lower jawbone). This method involves compressing the fractured bone fragments together using a plate or screw to facilitate healing.
**Why the Correct Answer is Right**
The correct answer is that compression osteosynthesis heals fracture mandible by promoting primary bone healing. This occurs through the formation of a stable, rigid fixation that allows the bone fragments to be compressed together, promoting the formation of a callus and eventually leading to the repair of the fracture. The compression also stimulates the production of growth factors, such as bone morphogenetic proteins (BMPs), which aid in the healing process.
**Why Each Wrong Option is Incorrect**
* **Option A:** This option is incorrect because compression osteosynthesis does not primarily rely on bone grafting for healing. While bone grafting may be used in conjunction with compression osteosynthesis, it is not the primary mechanism of action.
* **Option B:** This option is incorrect because external fixation does not provide the same level of stability and compression as compression osteosynthesis. External fixation is often used for more complex fractures or in cases where internal fixation is not feasible.
* **Option C:** This option is incorrect because primary bone healing through compression osteosynthesis is a more efficient and effective process than secondary bone healing through callus formation.
**Clinical Pearl / High-Yield Fact**
It's essential to note that compression osteosynthesis is not suitable for all mandible fractures, particularly those with significant displacement or comminution. In such cases, other treatment options, such as external fixation or bone grafting, may be more appropriate.
**Correct Answer:** C.