Study on the classification of periodontal phenotype based on crown forms and gingival characteristics / 实用口腔医学杂志

87 periodontally healthy young volunteers paticipated in the study.4 clinical parameters were measured:Gingival thickness (GT),gingival width (GW),papilla height (PH) and crown width/crown length ratio (CW/CL).Cluster analysis was employed to identify the periodontal phenotypes.As a result,the periodontal phenotype of maxillary anterior tooth was classified as thin fan type (Ⅰ,n =31),thick and wide type(Ⅲ,n =8) and intermediate type(Ⅱ,n =48) in Han Chinese.

Relationship between gingival thickness and the underlying bone thickness in maxillary anterior tooth area / 实用口腔医学杂志

Objective:To study the relationship between gingival thickness(GT)and the underlying alveolar bone thickness(BT)in maxillary anterior region and the distance from cemento-enamel junction(CEJ)to alveolar crest.Methods:30 young volunteers with healthy gingiva were included.GT was measured at 2mm below the CEJ,buccal BT were measured at 3 locations:2,4 and 6 mm below the alveolar crest respectively,the distance from CEJ to alveolar crest were measured by CBCT and clinical direct measure respectively. Results:The correlation coefficient (r)values between GT and BT at 2,4 and 6 mm below alveolar crest were 0.493,0.383 and 0.342 (P <0.001 )respectively,the r value between GT and the distance from CEJ to alveolar crest was -0.21 3(P <0.01 ).No statistically significant difference was observed between CBCT and clinical measurements(t =-0.521 ,P =0.603).Conclusion:There is positive correlation between GT and BT at 2,4 and 6 mm below alveolar crest and negative relation between GT and the distance from CEJ to alveolar crest.