Sonographic observation of the paradoxical masseteric bulging and clinical implication of functional compartment

• 영문명: Sonographic observation of the paradoxical masseteric bulging and clinical implication of functional compartment
• 발행기관: 대한해부학회
• 저자명: Kyu-Ho Yi Hyungkyu Bae Soo-Bin Kim Woo-Ram Kim Won Lee Ji-Soo Kim Hee-Jin Kim
• 간행물 정보: 『Anatomy and Cell Biology』Vol.57(1), 13~17쪽, 전체 5쪽
• 주제분류: 의약학 > 의학일반
• 파일형태: PDF
• 발행일자: 2024.03.30

영문 초록

Masseter are commonly botulinum neurotoxin targeted muscle for facial contouring in aesthetic field. However, paradoxical masseteric bulging is common adverse effect that has not been discussed with ultrasonographic observations. Retrospective study has been conducted from October, 2021 to January, 2023, out of 324 patients have done blinded botulinum neurotoxin injection in the masseter at the middle and lower portion of the masseter with each side of 25 units (letibotulinum neurotoxin type A), 3 patients demonstrated paradoxical masseteric bulging has been reported and the image observed by ultrasonography by physician. Based on the observations made, we can infer that the function of the moving muscle involves twisting of the muscle fibers during contraction, along with the twisting of the deep inferior tendon, which causes the muscle to be divided into anterior and posterior compartments rather than into superficial and deep compartments of masseter. In ultrasonographic observe the skin surface of a patient with paradoxical masseteric bulging, it is observable that either the anterior or posterior part contracts significantly. The functional units of anterior and posterior compartment are observable as muscular contraction of inward movement of the muscle from either the anterior or posterior functional unit.

목차

Introduction

Materials and Methods

Discussion

ORCID

Author Contributions

Conflicts of Interest

Funding

Acknowledgements

References

키워드

Paradoxical masseteric bulging Functional compartment Masseter muscle Deep inferior tendon Ultrasonography