关键词: 颏下岛状瓣, 口腔颌面部缺损, 颏下动脉, 血管蒂

Abstract: The submental island flap is an axial pattern flap whose blood is supplied by the submental artery which derives from facial artery. The submental island flap has a stable blood supply and is easy to prepare，with a concealed donor site scar postoperatively. Since the development of submental island flap，it has been widely and flexilbly used by oral and maxillofacial surgeons，head and neck surgeons and plastic surgeons after several modifications. Currently，the submental island flap has been widely used in the repair of oral，oropharyngeal and facial defects，including the soft palate，zygomatic and temporal regions. The wide application of submental island flap mainly depends on its blood supply characteristics，as well as the improvement and vascular pedicle lengthening strategies. This paper gives a detailed summary of the blood supply characteristics，skin flap types and improvements，vascular pedicle elongation methods and innovative applications of submental island flap，so as to provide a comprehensive application strategy for selecting submental island flap to repair oral and maxillofacial defects.

Key words: submental island flap, oral and maxillofacial defect, submental artery, vascular pedicle