Measurement And Analysis Of Gingival Biotype In The Maxillary Anterior Teeth Area Of Xinjiang Uygur Population Based On CBCT

Objective: CBCT was used to measure the gingival biotype of the maxillary anterior teeth in Xinjiang Uygur population,and to explore the related factors affecting gingival biotype.Methods: 85 patients(510 maxillary anterior teeth)eligible for healthy gums were screened through medical history collection and clinical examination.CBCT was taken under the state of insufflation to obtain three-dimensional reconstruction images and the buccal side of the site to be included Gum thickness(GT),buccal alveolar bone thickness(BT),distance from buccal cemento-enamel junction to alveolar crest(BC-CEJ)and distance from alveolar crest to gingival margin(BC-GM),Crown Length(CL)and Crown Width(CW)and other data were measured.Finally,statistical analysis was used to obtain the relevant parameters and influencing factors of gingival biotype.Results: The average thickness of the gums of the middle jaw incisors is 1.57 mm,the lateral incisors are 1.40 mm,and the canines are 1.28 mm.Gingival thickness maxillary central incisor> lateral incisor> canine(P <0.001).In maxillary central incisors,the thickness of male gums is greater than that of females and the difference is statistically significant(P <0.01).Gum thickness is also related to the shape of the crown.The square shape corresponds to the largest gum thickness,followed by the sharp circle,and the oval shape is the thinnest,but the difference is only statistically significant in the lateral incisors(P <0.01).Conclusions: The gingival biotypes in the maxillary anterior teeth of the Uyghur adults in Xinjiang are mainly thick gingival in the central incisors and thin gingival in the lateral incisors and canines.The thickness of the gums in the maxillary central incisor area of men is greater than that of women.Gum thickness was positively correlated with alveolar bone thickness and crown width to crown length at 3mm and 6mm of enamel cement bone root.