Facial Soft Tissue Thickness in Taiwan Adults – A Retrospective MRI Study in National Taiwan University Hospital
Date Issued
2014
Date
2014
Author(s)
Chen, I-Hung
Abstract
Facial reconstruction is the approximation of an antemortem face from human skeletal remains. All of the reconstruction methods require the measurement of average tissue thicknesses at landmark on the face. Previous studies showed that different populations exhibit significant variation in facial tissue thickness. To our knowledge, there are no publications on soft tissue thickness in the Taiwanese population. The aim of this study was to create a reference database of facial tissue thickness in the Taiwanese population.
The study material included those who had undergone brain MRI in National Taiwan University Hospital since May, 2012 to December, 2013. Measurements were taken at 14 points at the midline and at 17 points at the bilateral using DICOM software (RadiAnt DICOM Viewer).
This study included 135 males (age range, 24-80 years; mean, 49.6 years) and 133 females (age range, 27-75 years; mean, 50.3 years). The measurement results were categorized according to sex, age group, BMI group and orthodontic skeletal classification. BMI value shows the greatest influence on facial soft tissue thickness. The higher BMI value, the thicker soft tissue thickness is at every landmark. Males have greater soft tissue thickness than females at most landmark. Age-related changes in soft tissue thickness are different among the landmarks. Tissue thickness at some landmarks shows decreasing with age (glabella、end of nasal、suborbital、mid lateral orbit) . There are also some landmarks show increasing with age (subnasal、upper lip margin、lateral glabella、midphiltrum、naso-labial ridge), while others presented the same values among different age groups. People of different orthodontic skeletal classes show little difference on tissue thickness at most of landmarks, however, orthodontic skeletal classes may influence the relative position between the soft tissue landmark and the skeletal landmark. We also create a linear regression model to present the various factors that affect facial soft tissue thickness and to estimate the thickness of a specific position.
In this study, we not only established a reference database of facial tissue thickness in Taiwanese population, but also presented the influence of sex, age, BMI and orthodontic skeletal classes on facial soft tissue thickness of different facial landmarks. Furthermore, we created a linear regression model to help the practitioners to improve the estimation of individual soft tissue thickness in order to perform better facial reconstructions in real case.
Subjects
法醫人類學
顏面重建
軟組織厚度
臺灣人
Type
thesis
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