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常规的颌下手术切口位于下颌骨下缘下方1.5—2.0厘米,大多数在分离下颌角区组织时可遇到支配下唇的面神经分支,但罕见于下颌下缘2.0厘米以外。采用常规切口有时可损伤该神经,而导致下唇运动功能暂时性或永久性损害。为此,作者比较了颈部较低位改良颌下切口与常规切口造成神经损害的发生率及持续时间。
Conventional submandibular incisions are located 1.5-2.0 cm below the lower edge of the mandible. Most of the facial nerve branches that dictate the lower lip may be encountered when separating the mandibular angle tissue, but are rarely found 2.0 cm below the lower edge of the mandible. The use of conventional incision can sometimes damage the nerve, leading to temporary or permanent damage to lower lip movement. To this end, the authors compared the incidence and duration of neurological damage caused by the lower neck modified submandibular incision with conventional incision.