Abstract：
For radical treatment of malignancies in the posterior region of the oral cavity and oropharynx, surgical exposure of the tumor by mandibulotomy is often required. Midline or paramedian vertical mandibulotomies are commonly performed in clinical practice, but these can damage the suprahyoid musculature and genioglossus, and weaken the swallowing and speech function of patients. Stair-stepped mandibulotomy is a new procedure, developed on the principles of functional surgery, that preserves the structure and function of the mandible whilst providing a clear field and avoiding damage to critical muscle attachments. Stair-stepped mandibulotomy is suitable for patients whose primary tumor is located in the middle and posterior part of the tongue or oropharynx, especially if the lesion involves extrinsic tongue muscles. In this case report, we draw on 2 cases of typical patients in our center to elaborate the surgery program design, operation points, advantages and disadvantages of stair-stepped mandibulotomy.
摘要：
对于口腔和口咽后部恶性肿瘤的根治性治疗，通常需要通过下颌骨切开术对肿瘤进行手术暴露。在临床实践中通常进行中线或旁正中垂直下颌骨切开术，但是这些会损害舌骨上肌肉组织和膝舌肌，并削弱患者的吞咽和言语功能。阶梯式下颌骨切开术是一种新的手术,根据功能手术的原理发展，保留了下颌骨的结构和功能，同时提供了清晰的视野并避免了对关键肌肉附件的损害。阶梯式下颌骨切开术适用于原发肿瘤位于舌中后部或口咽部的患者，特别是如果病变涉及外部舌头肌肉。在这个案例报告中,我们以我们中心的2例典型患者为样本，详细阐述手术方案设计，操作点,阶梯式下颌骨切开术的优缺点。
