As a clearly identifiable structure spanning the lateral and midface, the appearance of the SMAS in this study supported the model proposed by Macchi et al. The SMAS plays a key role in the rhytidectomy, commonly known as the facelift procedure. Another inconsistency often discussed is its continuity with the parotid fascia. Specimens were examined to determine the extent and continuity of the nasal SMAS into the face. The submuscular aponeurotic system SMAS:
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Forehead samples were characterised by obliquely oriented fibrous septae traversing subcutaneous fat. The existence of the SMAS separate from the parotid fascia was more readily agreed upon [ 71011 ], although earlier studies remained inconclusive [ 912 ]. Macchi and colleagues sjas the first to present the SMAS as a continuous layer extending from the parotid region to the nasolabial fold with progressive regional thinning.
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In the upper lateral wall of the nose, an area of deficient muscle, where the SMAS and a small amount of fat were the only soft tissue coverage, was observed. Please see Macchi et al.
An irregular array of fibrous septae was present in the superficial adipose layer of the facial and cervical platysma tissue samples. StatPearls Publishing; Jan.
Fat distribution in different layers was also analyzed. This system divides the deep and superficial adipose tissue of the face and has region specific morphology.
This is an open access article distributed under the Creative Commons Attribution Licensewhich permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. Five regional samples corresponded to the model proposed by Macchi et al.
The facial nerve exits the skull inferior to the tragus smqs the ear, and its proximal branches, mainly the temporal, zygomatic, and marginal mandibular nerves course deep to the SMAS after exiting the parotid gland.
The zygomaticus musculature of the midface was enveloped by smad SMAS, which had a layered appearance histologically and became progressively more aponeurotic and hence thinner towards the medial aspect of the face.
The platysma muscle had smss both superficial and deep to its surface. The fibromuscular layer of the SMAS integrates with the superficial temporal fascia and frontalis muscle superiorly, and with the platysma muscle inferiorly.
Also similar to the temporal region was the close adherence of the superficial fascial tissue to the muscle surface of frontalis. Arch Facial Plast Surg. The presence of the SMAS in the cervical platysma region was inconclusive, impeded by a deep subcutaneous adipose layer. Variability within the platysma muscle influences the extent and thickness of the SMAS.
SMAS – Wikipedia
A bidirectional cervicofacial rhytidectomy. Other Issues As described previously, there have been numerous attempts smzs delineate and provide a more clear anatomical definition of the SMAS.
Digital images were taken throughout to record the results of the dissection. The SMAS plays a key role in the rhytidectomy, commonly known as the facelift procedure. One study by Khawaja et al. Nasal samples had smass subcutaneous adipose tissue separating the layers.
Despite these inconsistencies, the SMAS certainly plays a significant role in providing facial elasticity and support, while also facilitating s,as of muscular activity of the cheek. Extension beyond the proposed model into the temporal region was observed, but nasal and forehead regions showed no evidence of SMAS, while its presence in the cervical platysma region remained inconclusive. Therefore, both temporal and zygomatic tissue samples had similar epidermal to dermal thickness.
In the parotid samples, the SMAS was superficial to two distinct fibrous layers, the deep platysma fascia and the parotid fascia. Articles needing additional medical references from December All articles needing additional references Articles requiring reliable medical sources All stub articles.
The SMAS and fat compartments of the nose: an anatomical study.
Development of the platysma muscle and the superficial musculoaponeurotic system human specimens at weeks of development. We have also provided s,as detailed description of fat distribution. Fascial and soft tissue variability was considerable within facial regions of the examined specimen, helping to explain the msas around the SMAS in the literature.
Full skin thickness samples used in the study were from an year-old male perfused cadaver obtained by Curtin University via a local donor bequest programme. Inferolateral aspect of the face, separation of platysma muscle and parotid fascia. A brand new Office in Istanbul, and a group of highly-motivated collaborators,are waiting for your insutructions.