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Comminuted fractures of the mandible are an important traumatism, in which the mandibular bone is splintered or crushed. Treatment of these types of fractures had always been a challenge to surgeons, considering both the severity of the trauma and the presence of discontinuity defects which require replacement and augmentation in order to treat the bone loss. Titanium mesh was proved to be particularly useful for reconstruction of mandibular discontinuity defects also it can be used as a scaffold for bone grafts. Electrophoretic deposition (EPD) is a coating technique used to increase the osseointegration and increases bone regeneration. OBJECTIVES: To histologically evaluate the effect of titanium mesh coated with hydroxyapatite nanocrystals using electrophoretic deposition on bone osseointegration and healing following comminuted mandibular fractures. MATERIALS AND METHODS: A controlled induced comminuted fracture on the inferior border of the mandible extending from the 2nd premolar to the 2nd molar was performed on 12 mongrel dogs. Six dogs were treated using titanium mesh coated with hydroxyapatite nanocrystals (study group) and the other six using uncoated titanium mesh (control group). The dogs were sacrificed at 2, 4 and 6 weeks and the specimens were dissected to be histologically and radiographically evaluated for new bone formation. RESULTS: The histological outcome showed superior bone healing in the bony defects in the resembling comminuted fracture in the study group than the control group. CONCLUSIONS: The nano-hydroxyapatite coated titanium mesh is a suitable method for reconstruction of comminuted fractures with bony defects

THE USE OF TITANIUM MESH COATED WITH HYDROXYAPATITE NANOCRYSTALS IN MANDIBULAR FRACTURE (EXPERIMENTAL STUDY)