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KMID : 1024020130430010031
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Imaging Science in Dentistry
2013 Volume.43 No. 1 p.31 ~ p.36
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Normal range of facial asymmetry in spherical coordinates: a CBCT study
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Yoon Suk-Ja
Wang Rui-Feng
Na Hee-Ja
Palomo Juan Martin
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Abstract
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Purpose: This study aimed to measure the bilateral differences of facial lines in spherical coordinates from faces within a normal range of asymmetry utilizing cone-beam computed tomography (CBCT). Materials and Methods: CBCT scans from 22 females with normal symmetric-looking faces (mean age 24 years and 8 months) were selected for the study. The average menton deviation was 1.01±0.66 mm. The spherical coordinates, length, and midsagittal and coronal inclination angles of the ramal and mandibular lines were calculated from CBCT. The bilateral differences in the facial lines were determined. Results: All of the study subjects had minimal bilateral differences of facial lines. The normal range of facial asymmetry of the ramal and mandibular lines was obtained in spherical coordinates. Conclusion: The normal range of facial asymmetry in the spherical coordinate system in this study should be useful as a reference for diagnosing facial asymmetry.
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KEYWORD
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Cone-Beam Computed Tomography, Imaging, Three-Dimensional, Facial Asymmetry
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