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Anatomical Continuation Between the Sub-Superficial Musculoaponeurotic System Fat and Retro-Orbicularis Oculi Fat: The True Nature of the Retro-Orbicularis Oculi Fat

Authors
 Hyo-Sang Ahn  ;  Ji-Soo Kim  ;  Hyung-Jin Lee  ;  Ji-Hyun Lee  ;  Hyoung Moon Kim  ;  Hee-Jin Kim 
Citation
 Facial Plast Surg Aesthet Med, : epub., 2020-10 
Journal Title
 Facial Plast Surg Aesthet Med 
Issue Date
2020-10
Abstract
Objective: This study aims to analyze the anatomical location and continuation between the retro-orbicularis oculi fat (ROOF) and sub-superficial musculoaponeurotic system fat (subSMAS fat; named "innominate fascia") by comparing their layered structures, thereby letting us suggest a safe minimally invasive procedure guideline for the forehead and temple. Methods: Ultrasonographic scanning was performed from the upper medial eyebrow to the lateral side of the superior temporal line in 109 volunteers. Hematoxylin and eosin staining was performed on five specimens at the same area as ultrasonographic scanning. Then, four embalmed cadavers were dissected from the orbicularis oculi, frontalis muscle, superficial temporal fascia, and SMAS to confirm the location and continuation pattern of the ROOF and subSMAS fat. Results: On ultrasonography and histological images, there was a continuous fatty layer from the ROOF to the subSMAS fat. When dissecting, the ROOF, which was located deep below the frontalis muscle, also continued to the subSMAS fat, passing through the superior temporal line in the upper temporal region. Conclusions: This study confirmed that the subSMAS fat is an anatomical fat structure that is continuous with the ROOF. Since the subSMAS fat layer is known as a less vascular area, it is considered a safer layer to avoid serious complications, and injecting accurately into the subSMAS fat layer has been a goal of clinicians. Based on this study, a cannula will safely approach the subSMAS fat through the ROOF injection that named "forehead-downward approach."
Full Text
https://www.liebertpub.com/doi/full/10.1089/fpsam.2020.0398
DOI
10.1089/fpsam.2020.0398
Appears in Collections:
2. College of Dentistry (치과대학) > Dept. of Oral Biology (구강생물학교실) > 1. Journal Papers
Yonsei Authors
Lee, Ji-Hyun(이지현) ORCID logo https://orcid.org/0000-0003-3732-2698
Lee, Hyung Jin(이형진) ORCID logo https://orcid.org/0000-0002-3082-935X
Choi, You Jin(최유진) ORCID logo https://orcid.org/0000-0003-3701-2200
URI
https://ir.ymlib.yonsei.ac.kr/handle/22282913/180823
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