Objective:This study aimed to analyze the lingual concavity of the mandibular second molar region using cone-beam computed tomography(CBCT),and investigate the differences in concavity depth among genders,different age groups,and different positions,in order to provide reference for clinical implant surgery.Methods:CBCT data of 120 patients in our department were selected,whose mandibular ridge width was greater than the basal width.They were divided into three groups according to age,and the selected anatomical landmarks were measured and analyzed.Results:The left and right measurements were symmetrical.With increasing age,there were significant differences in the upper and lower width(Wc,Wb)and height(VCB)of the alveolar bone(P<0.05),and these differences gradually decreased.The width and height of the alveolar bone in males were greater than those in females(P<0.05).The upper and lower bone widths(Wc,Wb)in the distal-middle plane were greater than those in the mesial-middle plane(P<0.05).As the measurement plane moved toward the distal-middle direction,the height of the alveolar bone(VCB)gradually decreased(P<0.05).The angle(α)and depth(LCD)of the lingual concavity in the distal-middle measurement plane were greater than those in the mesial-middle plane(P<0.05).Conclusion:In implant surgery,due to age-related changes,it is necessary to comprehensively consider the changes in bone width,height,angle and other factors in the lingual area,which may bring surgical risks,especially in female patients and when selecting wide implants.It is important to fully understand the anatomical characteristics of this area and develop a comprehensive plan for implant surgery.
mandibular second molarlingual concavityalveolar ridge morphologycone-beam computed tomographyage-related changesdental implant
维普
万方数据
