Choi You-Jin, Won Sung-Yoon, Lee Jae-Gi, Hu Kyung-Seok, Kim Sung-Taek, Tansatit Tanvaa, Kim Hee-Jin
Mr Choi is a Graduate Student, Dr Hu is an Associate Professor, and Dr H-J Kim is a Professor, Division of Anatomy and Developmental Biology, Department of Oral Biology, Human Identification Research Institution, BK21 PLUS Project, Yonsei University College of Dentistry, Seoul, Republic of Korea. Dr Won is an Assistant Professor, Department of Occupational Therapy, Semyung University, Jecheon, Republic of Korea. Dr Lee is an Assistant Professor, Department of Dental Hygiene, School of Health and Medicine, Namseoul University, Choenan, Republic of Korea. Dr S-T Kim is a Professor, Department of Oral Medicine, TMJ and Orofacial Pain Clinic, College of Dentistry, Yonsei University, Seoul, Republic of Korea. Dr Tansatit is a Professor, Chula Soft Cadaver Surgical Training Center and Department of Anatomy, Faculty of Medicine, Chulalongkorn University, Bangkok, Thailand.
Aesthet Surg J. 2016 Mar;36(3):344-8. doi: 10.1093/asj/sjv190. Epub 2015 Oct 26.
The forehead is a common site for injection of botulinum neurotoxin type A (BoNT-A) to treat hyperactive facial muscles. Unexpected side effects of BoNT-A injection may occur because the anatomy of the forehead musculature is not fully characterized.
The authors described the lateral border of the frontalis in terms of facial landmarks and reference lines to determine the safest and most effective forehead injection sites for BoNT-A.
The hemifaces of 49 embalmed adult Korean cadavers were dissected in a morphometric analysis of the frontalis. L2 was defined in terms of FT (the most protruding point of the frontotemporal region), L0 (the line connecting the infraorbital margin with the tragus), and L1 (the line parallel to L0 and passing through FT) such that L2 was positioned 45° from L1 and passed through FT.
The distance from FT to the superior margin of the orbicularis oculi was 12.3 ± 3.3 mm. The frontalis extended more than 5 cm along L2 in 49 of 49 cases (100%), more than 6 cm in 47 cases (95.9%), more than 7 cm in 34 cases (69.4%), more than 8 cm in 11 cases (22.4%), and more than 9 cm in 3 cases (6.1%). The lateral border of the frontalis ran parallel to and within 1 cm of the medial side of L2.
Surface anatomy mapping can assist with predicting the lateral border of the frontalis to minimize the side effects and maximize the efficiency of BoNT-A injections into the forehead.
前额是注射A型肉毒杆菌神经毒素(BoNT-A)治疗面部肌肉活动亢进的常见部位。由于前额肌肉组织的解剖结构尚未完全明确,BoNT-A注射可能会出现意外的副作用。
作者根据面部标志和参考线描述额肌的外侧边界,以确定BoNT-A注射到前额最安全、最有效的部位。
对49具防腐处理的成年韩国尸体的半侧面部进行额肌的形态测量分析。L2是根据额颞区域最突出点(FT)、连接眶下缘与耳屏的线(L0)以及与L0平行且经过FT的线(L1)来定义的,使得L2与L1呈45°角并经过FT。
从FT到眼轮匝肌上缘的距离为12.3±3.3毫米。在49例(100%)中,额肌沿L2延伸超过5厘米,47例(95.9%)超过6厘米,34例(69.4%)超过7厘米,11例(22.4%)超过8厘米,3例(6.1%)超过9厘米。额肌的外侧边界与L2内侧平行且在其1厘米范围内。
表面解剖图谱有助于预测额肌的外侧边界,以尽量减少副作用并最大限度提高BoNT-A注射到前额的效率。