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Use of Micro X-ray Computed Tomography with Phosphotungstic Acid Preparation to Visualize Human Fibromuscular Tissue

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The Nasolabial Fold: A Micro-Computed Tomography Study.

Hyun-Jin Kwon¹, Jehoon O¹, Tae-Hyeon Cho¹

¹From the Department of Anatomy, Yonsei University College of Medicine; and the Division in Anatomy and Developmental Biology, Department of Oral Biology, Yonsei University College of Dentistry.

Plastic and Reconstructive Surgery

|October 3, 2019

Summary

This summary is machine-generated.

This study clarifies the 3D structure of the nasolabial fold using micro-CT and histology. Alterations in adipose tissue and muscle attachments contribute to fold depth with aging.

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Area of Science:

Anatomy
Histology
Medical Imaging

Background:

The nasolabial fold presents anatomical complexities for aesthetic treatments.
Its intricate composition and topography remain poorly defined.

Purpose of the Study:

To elucidate the three-dimensional (3D) structures of the nasolabial fold.
To detail the composition of the nasolabial fold region.

Main Methods:

Utilized micro-computed tomography (micro-CT) for 3D structural analysis.
Employed histologic observation with phosphotungstic acid and standard histologic staining.
Analyzed 24 bilateral specimens from 12 cadavers (mean age 80.3 years).

Main Results:

Identified dense irregular connective tissue and muscle fibers in the medial nasolabial fold.
Observed numerous fibrous septa with abundant adipose tissue in the lateral region.
Detailed muscle attachments (levator labii alaeque nasi, zygomaticus minor) and fascial septa tethering to the dermis.

Conclusions:

Aging-related changes in adipose tissue and subcutaneous layer depth contribute to nasolabial fold deepening.
Targeting lateral adipose tissue or medial muscle traction may ameliorate the fold.