Preliminary orthodontic insights into facial soft tissue thickness measurements using semi-automated cephalometric analysis in a Cambodian cohort.

Background: The facial soft tissue thickness [FSTT] is a prominent factor in orthodontic diagnoses and treatment planning. The variance in FSTT measurements then gives orthodontists a better understanding of how to shape their treatment (based on classification of skeletal deformity and sex). This study aimed to assess the FSTT differences in a population of Cambodian adults aged 18-25 (in skeletal classes I, II, and III) and between genders. Method: A retrospective audit of 300 lateral cephalometric radiographs was undertaken through UP Dental Hospital. The sample was stratified equally by sex and skeletal class (n = 100 per class; 50 males, 50 females) based on Steiner analysis SNA, SNB and ANB. Linear FSTT measurements were carried out at 11 points using the software Webceph. Results: Significant FSTT differences were measured at the various cephalometric landmarks; in males, significant difference is noted at Rhinion, Subnasale, Labrale superius, and Stomion. In females, significant differences exist at Subnasale, Labrale superius, Stomion, and Labrale inferius. Males had a thicker soft tissue than females when evaluated collectively among the 11 points and skeletal Classes. Conclusion: FSTT helps in determining individualized treatment plans. Of the modalities of imaging that are available, lateral cephalometric radiography still represents the gold standard for determining facial soft tissue. This study provides a baseline reference for orthodontists, maxillofacial surgeons, and dental surgeons in Cambodia for treatment planning. Knowledge of the differences in FSTT could contribute to more customized treatment plans.