ĐẶC ĐIỂM GIẢI PHẪU ĐẠI THỂ VÀ VI THỂ CỦA HỆ THỐNG CÂN CƠ NÔNG VÙNG MŨI ỨNG DỤNG TRONG PHẪU THUẬT TẠO HÌNH THẨM MỸ

Abstract

Introduction: The existence of the superficial musculoaponeurotic system (SMAS) in the nasal region remains a subject of debate, with no consensus in the literature. Objective: To determine the prevalence of the nasal SMAS in macroscopic and microscopic images of cadaveric specimens from adult Vietnamese individuals; To assess the thickness of the SMAS at anatomical landmarks in the nasal region. Subjects and Methods: A cross-sectional descriptive study was conducted on 33 nasal bone specimens and eight histological sections of the nasal region obtained from formalin-fixed cadavers of adult Vietnamese individuals preserved under refrigeration. Results:  Macroscopic examination confirmed the presence of the SMAS in 100% of nasal bone specimens, appearing as a distinct anatomical layer continuous with the facial SMAS. Histological analysis also demonstrated the presence of the SMAS in 100% of soft tissue samples. The thickness SMAS was recorded at the Sellion (S), followed by the Rhinion (R). Conclusion: This study confirms the presence of the nasal SMAS as a distinct anatomical structure. The findings provide valuable anatomical data on nasal SMAS, contributing to optimizing surgical techniques in aesthetic rhinoplasty.