In condylar fracture surgery, reduction is the most difficult step and the key factor which determined the postoperative outcome. Therefore, the aim of this study is to develop a new instrument, which the investigators call condylar redactor, to assist the surgeon to reduct the condylar segments effectively.

In this prospective cohort study, it involved condylar fractures patients who were received surgical treatment from January 2014 to June 2016. Patients in the experimental group were treated with the condylar reductor, and patients in the control group were treated with the traditional surgical instruments. The primary outcome variable was reduction time and reduction rate. The continuity correction X2 and test student t test were used.

Inclusion Criteria:

• patients aged 18-60 with mandibular condylar fractures were treated in Oral and maxillofacial surgery department, West China hospital of stomatology, China from January 2014 to January 2016.

Exclusion Criteria:

• patients refused to participate in the clinical trial;
• condylar fracture dislocation was not obvious, conservative treatment can be used;
• mandibular condylar comminuted fracture;
• mandibular condyle need to be reconstructed.