OBJECTIVETo discuss the treatment and prevention of the complications resulted from intraoral mandibular angle reduction.

METHODSFrom July 2002 to August 2008, 672 cases underwent intraoral mandibular angle reduction. The 59 cases with postoperative complications were treated and followed up.

RESULTSNo severe complication happened. In 18 cases with asymmetry, 13 cases improved through soft tissue adjustment, 5 cases were reoperated with good results. Intraoperative precise osteotomy was needed to prevent asymmetry. 3 cases with infection healed with drainage and anti-inflammatory treatment. Intraoperative aseptic manipulation and adequate drainage were necessary to prevent infection. 20 cases with labial numbness recovered 3 - 6 weeks later. 5 cases with temporary facial nerve injury recovered 2 - 3 months later. 12 cases with bleeding and hematoma were treated by dressing with pressure and drainage and healed 3 weeks later. Skin necrosis resulted from tight dressing occurred in one case, which were treated with skin graft. Intraoperative protection of nerve and vessels, as well as the dressing were very important.

CONCLUSIONSMost of the complications can be treated and recovered well. Preoperative design, precise manipulation and postoperative reliable dressing are the key points to prevent complications.