Sandulescu T, Spilker L, Rauscher D, Naumova E A, Arnold W H
Department of Biological and Material Sciences in Dentistry, Faculty of Health, Witten/Herdecke University, Witten, Germany.
Department of Biological and Material Sciences in Dentistry, Faculty of Health, Witten/Herdecke University, Witten, Germany.
Ann Anat. 2018 May;217:111-117. doi: 10.1016/j.aanat.2018.02.007. Epub 2018 Mar 26.
The superficial musculoaponeurotic system (SMAS), a structure that has been discussed with some controversy, has a complex morphological architecture.
Histological analysis was performed on tissue blocks of the nasolabial fold (NLF) collected postmortem from formalin-fixed bodies of one male and one female donor. Serial histological sections were made, stained and digitized. Three-dimensional reconstructions of the histological structures were performed. Specimen- and location-specific differences were determined. SEM analysis of the NLF tissue block was performed.
The NLF SMAS is a fibro-muscular, three-dimensional meshwork bolstered with fat cells. Two SMAS structure types were identified adjacent to the NLF. The cheek SMAS structure showed a regular, vertical and parallel alignment of the fibrous septa, building a three-dimensional meshwork of intercommunicating compartments. It changed its morphology, condensing while transiting the NLF and passing over to form an irregular structure in the upper lip region. SEM analysis demonstrated the connection between the fibrous meshwork and the fat cells. SMAS blood circulation expanded subcutaneously without perforating the fibro-muscular septa.
The NLF has a recognizable condensed cheek SMAS structure and represents the transition zone between the two SMAS types. Specimen-specific morphological differences necessitate individual planning and area-specific surgical procedures.
表浅肌肉腱膜系统（SMAS）是一个存在一定争议的结构，其形态结构复杂。
对从一名男性和一名女性供体的福尔马林固定尸体上尸检采集的鼻唇沟（NLF）组织块进行组织学分析。制作连续组织切片，染色并数字化。对组织结构进行三维重建。确定标本和位置特异性差异。对NLF组织块进行扫描电子显微镜（SEM）分析。
NLF的SMAS是一个由脂肪细胞支撑的纤维肌性三维网络。在NLF附近鉴定出两种SMAS结构类型。脸颊SMAS结构显示纤维间隔呈规则、垂直且平行排列，形成一个相互连通腔隙的三维网络。它在经过NLF时形态发生改变，凝聚并在上唇区域转变为不规则结构。SEM分析显示了纤维网络与脂肪细胞之间的连接。SMAS血液循环在皮下扩展，未穿透纤维肌间隔。
NLF具有可识别的凝聚脸颊SMAS结构，代表两种SMAS类型之间的过渡区。标本特异性形态差异需要个体化规划和特定区域的手术操作。
