Objective:To summarize and discuss the morbidity characteristic

treatment and complications of mandibular fracture.Methods:Two hundred and twenty-eight patients with mandibular fracture were evaluated retrospectively. Their age

gender

occupation

cause of fracture

anatomic site

accompanying trauma

treatment methods and complications were collected and analyzed. All the cases were collected from October 2011 to September 2016 in Stomatological Hospital Affiliated to Chongqing Medical University.Results:Among 228 cases of mandibular fracture

the incidence of male was 3.15 times higher than that of female. The average age was approximately（35.00±14.61）years. Workers accounted for the highest proportion. Traffic accidents was the most common cause

a total of 93 cases

accounting for 40.79%

followed by falls（20.61% ）. There were 325 fractures among all the cases and occurred most common

in decreasing order

in the symphysis（119 cases

36.62% ）

angle（72 cases

22.15% ）

condyle（65 cases

20.00% ）and body（56 cases

17.23% ）. Forty-one cases（17.98% ）had associated injuries mostly combined midface fractures（36 fractures）. Treatment included open reduction with titanium mini-plates and screws in 208 patients

and intermaxillary fixation in other 9 patients.The remaining 11 patients discharged without treatment. In this study

the treatment most commonly used was rigid internal fixation combined with intermaxillary fixation in 192 cases

accounting for 88.48% of all receiving treatment patients. Complications occurred in13 cases（5.70% ）

mainly due to nerve injury（11 cases

accounting for 5.07% ）followed by infection. Conclusion:Mandibular fractures occur most likely in young and middle-aged males. The most common cause is traffic accident

and symphysis is the most injured sites. Associated injuries occur in midface mostly. Rigid internal fixation combined with inter maxillary fixation is the most common mode of treatment

with relatively low rate of postoperative complications.