[Comparative quantitative analysis of palatal masticatory mucosal thickness between Han and Uygur in Xinjiang area].

Abstract

Purpose: To measure and compare the palatal masticatory mucosal thickness from maxillary canine to the second molar region of Han and Uygur periodontally healthy people in Xinjiang area by using CBCT, and to analyze the related factors.

Methods: CBCT images of 48 periodontally healthy subjects in each nationality were selected from the Dental Clinic of the First Affiliated Hospital of Xinjiang Medical University according to the inclusion and exclusion criteria. The thickness of the palatal masticatory mucosa, the height and width of the palatine fornices, and the location of the greater palatine foramen were measured at the distance of 3, 6, 9 and 12 mm from the gingival margin.

Results: There were significant differences in the average palatal mucosal thickness at the distance of 3, 6, 9 and 12 mm from the gingival margin, different anatomical shapes of the palatine fornices and different age groups between Han and Uygur(P＜0.05). There was no significant difference in the distribution of the greater palatine foramen between Han and Uygur(P＞0.05). However, the correlation between mucosal thickness and related factors in Han population was closer. The general trend was similar between the two groups: ①from 3mm to 12mm from the gingival margin, the mucosal thickness first increased and then decreased from the canine to the second premolar, decreased first and then increased from the first molar, and continued to increase from the second molar; ②the mucosal thickness of canine, first premolar and first molar was affected by age and the anatomical morphology of palatine fornix. The mucosal thickness of second premolar was affected by age, and the mucosal thickness of second molar was affected by the anatomical morphology of palatine fornix; ③the greater palatal foramen was mostly located in the distal region of the second molar, and the distance from the greater palatal foramen to the midpalatal suture was smaller in the HFT group than in the LFT group(P＜0.05).

Conclusions: The most suitable donor site for autologous connective tissue transplantation in both nationalities is the palatal masticatory mucosa when the distance between the gingival margin of the maxillary first and second premolars is 3-9 mm.