교근에서 보툴리눔 독소 주사점의 표지화
- Author(s)
- 김준형; 이민재; 김현지; 손대구; 한기환; 이소영; 임정근; 최인장; Jun Hyung Kim; Min Jae Lee; Hyun Ji Kim; Dae Gu Son; Ki Hwan Han; So Young Lee; Jung Guen Lim; In Jang Choi
- Keimyung Author(s)
- Kim, Jun Hyung; Son, Dae Gu; Han, Ki Hwan; Lee, So Young; Lim, Jeong Geun; Choi, In Jang
- Department
- Dept. of Plastic Surgery (성형외과학)
Dept. of Rehabilitation Medicine (재활의학)
Dept. of Neurology (신경과학)
Dept. of Anatomy (해부학)
- Journal Title
- 대한성형외과학회지
- Issued Date
- 2005
- Volume
- 32
- Issue
- 3
- Abstract
- Generally, many Asian women tend to dislike the square jaw, as they believe it makes the face look wider, giving a stubborn and strong impression. Contouring of the mandible is therefore a relatively common aesthetic procedure among Asians. These days, the use of botulinum toxin for contouring of the lower face offer simple alternative to surgery. Motor point, which is the site over a muscle where its contraction may be elicited by a minimal intensity short duration electrical stimulus, is the optimal injection point of botulinum toxin. Study was undertaken to identify the location of motor point of the masseter muscle and the skin surface landmark. First, the thickest point of the masseter muscle was inspected through palpation and inspection by 3 different individual plastic surgeons and then compound muscle action potentials(CMAPs) of masseter muscle in 15 health volunteers were recorded using EMG. For the localization of the measured points, line between lateral canthus to the mandibular angle was used. Location of motor points were mapped to skin surface from lateral canthus in a percentage of the distance along the landmark line and in distance in millimeters. The clinical injection point was located at 71.69 percentile and 7.3mm of the landmark line. The motor point test was located at 72.54 percentile and 7.1mm of the landmark line. The depth of motor point was 16mm. There was no statistically significant difference between the clinical injection point and the motor point. We conclude that surface mapping of motor point of the masseter muscle would increase accessibility and accuracy in botulinum toxin injection for contouring of the lower face.
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