健康成人颊唇部降口角表情肌高频超声表现及其临床应用价值探讨

High-frequency ultrasound imaging of the depressor anguli oris muscle in the buccolabial region in healthy adults and its clinical application value

目的 应用高频超声观察健康成人颊唇部降口角肌、颈阔肌及其毗邻的降下唇肌和下唇动脉解剖位置,探讨其临床应用价值。方法 前瞻性纳入60例健康成人共120侧颊唇部,应用高频超声扫查双侧颊唇部,分析其解剖结构;比较不同性别左、右侧降口角肌中点处肌肉厚度的差异。结果 高频超声可以清晰显示降口角肌、降下唇肌的起止点、部分颈阔肌纤维分布,以及面动脉的走行及其分支下唇动脉发出点。120侧颊唇部中仅8侧下唇动脉从面动脉发出后分成深浅2支“夹住”降下唇肌,其余112侧下唇动脉走行于降口角肌深面。男性左、右侧降口角肌中点处肌肉厚度分别为1.9(1.6,2.0)mm、(1.9±0.3)mm,均较女性同侧[1.5(1.3,1.6)mm、(1.6±0.2)mm]增厚,差异均有统计学意义(均P<0.001)。结论 高频超声可用于评估颊唇部解剖结构,为提升下面部整形美容提供有效参考。

Objective To observe the anatomical positions of the depressor anguli oris muscle,platysma,and adjacent depressor labii inferioris muscle and inferior labial artery in the buccolabial region in healthy adults by high-frequency ultrasound,and to explore its clinical application value.Methods A total of 60 healthy adults(120 buccolabial sides)were prospectively enrolled.Bilateral buccolabial regions were scanned by high-frequency ultrasound,the anatomical structures was analyzed.The differences in muscle thickness at the midpoint of the left and right depressor anguli oris muscle between genders were compared.Results Ultrasound clearly demonstrated the origins and insertions of the depressor anguli oris and depressor labii inferioris muscles,the distribution of some platysma fibers,and the course of the facial artery and the origin of its inferior labial artery branch.In 8 of 120 buccolabial sides,the inferior labial artery split into deep and superficial branches after branching from the facial artery,“encasing”the depressor labii inferioris muscle.In the remaining 112 sides,the inferior labial artery coursed deep to the depressor anguli oris muscle.The muscle thickness at the midpoint of the left and right depressor anguli oris muscle in males were 1.9(1.6,2.0)mm and(1.9±0.3)mm,respectively,which were thicker than those on the same side in females[1.5(1.3,1.6)mm,(1.6±0.2)mm],and the differences were statistically significant(both P<0.001).Conclusion High-frequency ultrasound can be used to assess the anatomical structures of the buccolabial region,providing effective reference for lower facial cosmetic and aesthetic procedures.