[Time effect of dentin matrix protein 1 and osteoclast expression during mandibular fracture healing in rats].

Objective: To study the expression of dentin matrix protein 1 (DMP1) and osteoclast in callus at different healing period of mandibular fracture in a adult Wistar rat model.

Methods: The mandibular fracture model of Wistar rats at the left mandibular ramus was established. The callus in the fractured site and the normal mandible were amputated at the 5th, 7th, 14th and 21st day after the fracture.

[Clinical study of surgical treatment of ankylosis of temporomandibular joint].

Objective: To analyze the clinical feature of temporomandibular joint (TMJ) ankylosis and to investigate the advantage and disadvantage of all kind of surgery methods of TMJ ankylosis for supplying references to the treatment of TMJ ankylosis.

Methods: Aetiology, sex, age at time of treatment, clinical features, radiographic findings, surgical treatment was reviewed and analyzed.

Results: Trauma (66.