Yi Kyu-Ho, Lee Ji-Hyun, Hu Hye-Won, Park Hyun-Jun, Bae Hyungkyu, Lee Kangwoo, Kim Hee-Jin
Wonju Public Health Center, Wonju, Korea.
Division in Anatomy and Developmental Biology, Department of Oral Biology, Human Identification Research Institute, BK21 FOUR Project, Yonsei University College of Dentistry, Seoul, Korea.
Anat Cell Biol. 2023 Sep 30;56(3):293-298. doi: 10.5115/acb.22.266. Epub 2023 Feb 17.
The mentalis muscle is a paired muscle originating from the alveolar bone of the mandible. This muscle is the main target muscle for botulinum neurotoxin (BoNT) injection therapy, which aims to treat cobblestone chin caused by mentalis hyperactivity. However, a lack of knowledge on the anatomy of the mentalis muscle and the properties of BoNT can lead to side effects, such as mouth closure insufficiency and smile asymmetry due to ptosis of the lower lip after BoNT injection procedures. Therefore, we have reviewed the anatomical properties associated with BoNT injection into the mentalis muscle. An up-to-date understanding of the localization of the BoNT injection point according to mandibular anatomy leads to better injection localization into the mentalis muscle. Optimal injection sites have been provided for the mentalis muscle and a proper injection technique has been described. We have suggested optimal injection sites based on the external anatomical landmarks of the mandible. The aim of these guidelines is to maximize the effects of BoNT therapy by minimizing the deleterious effects, which can be very useful in clinical settings.
颏肌是一对起自下颌骨牙槽骨的肌肉。该肌肉是肉毒杆菌神经毒素（BoNT）注射治疗的主要靶肌肉，旨在治疗因颏肌亢进引起的鹅卵石样下巴。然而，对颏肌解剖结构和BoNT特性的了解不足可能导致副作用，如在BoNT注射后因下唇下垂而出现闭口不全和微笑不对称。因此，我们回顾了与BoNT注射入颏肌相关的解剖学特性。根据下颌骨解剖结构对BoNT注射点定位的最新认识有助于更准确地将药物注射到颏肌中。本文提供了颏肌的最佳注射部位，并描述了正确的注射技术。我们根据下颌骨的外部解剖标志提出了最佳注射部位。这些指南的目的是通过将有害影响降至最低来最大化BoNT治疗的效果，这在临床环境中可能非常有用。
