CBCT analysis of the relative position between maxillary central incisors and alveolar bone in Southern Chi-nese adults
10.12016/j.issn.2096-1456.2024.02.005
- VernacularTitle:华南地区成人上颌中切牙与牙槽骨相对位置关系CBCT分析
- Author:
Ziling DING
1
;
Xin LIU
;
Xiaoyu YANG
;
Chufeng LIU
Author Information
1. 南方医科大学口腔医院(口腔医学院)种植中心,广东广州(510280)
- Keywords:
cone-beam computed tomography;
maxillary central incisor;
upper incisors position;
immediate implant;
labial bone wall;
palatal bone wall;
the long axis of tooth;
the long axis of alveolar bone
- From:
Journal of Prevention and Treatment for Stomatological Diseases
2024;32(2):116-122
- CountryChina
- Language:Chinese
-
Abstract:
Objective Exploring the position and bone wall thickness characteristics of the maxillary central inci-sors in Southern Chinese adults to provide a clinical reference for the design of immediate maxillary central incisor im-plantation surgery.Methods The hospital ethics committee approved the study,and the patients provided informed consent.CBCT images of 990 adult patients(aged 20-79 years)from the Stomatology Hospital(January 2018 to Decem-ber 2021)were categorized based on the dental arch form and age-sex groups.Sagittal CBCT images of the maxillary central incisors were used to measure the labial and palatal bone thickness wall at 4 mm the CEJ to apical,the middle of the root,and the angle between the tooth long axis and the long axis of the alveolar process,to compare the thickness of the labial and palatal bone walls in samples of male and female patients,and to explore the relationship between the angle between the tooth long axis and the alveolar process long axis in samples of male and female patients in different age groups(20-39 years;40-59 years;60-79 years).Results Significant differences were found in the labiopalatine side of the alveolar bone of the maxillary incisor root position.A total of 95.8％(948/990)of the maxillary incisors were positioned more buccally,4.1％(41/990)were positioned more midway,and 0.1％(1/990)were positioned more palatal-ly.The thicknesses of the bone wall at the CEJ of 4 mm below the palatal side,the middle of the root,and at the apex were greater(1.82±0.56 mm,3.20±1.10 mm,and 7.70±2.00 mm,respectively)than those at the labial side(1.21± 0.32 mm,0.89±0.35 mm,and 1.86±0.82 mm,respectively),with statistical significance(P＜0.05).Male bone wall thickness was generally greater than female bone wall thickness(P＜0.05).The angle between the long axis of male teeth and the alveolar bone was 14.77°±5.66°,while that of female teeth was 12.80°±5.70°,with a statistically signifi-cant difference(P＜0.05).The angle between the long axis of teeth and the alveolar bone in the 40-59-year-old group and the 60-79-year-old group was greater than that in the 20-39-year-old group,and the difference was statistically sig-nificant(P＜0.05).Conclusion A total of 95.8％of adults in South China have maxillary central incisors with root de-viation toward the labial bone cortex.The thickness of the labial bone wall is much thinner than that of the labial bone wall,which is the middle of the thickness of the root.In Southern Chinese adults,the angle between the upper central incisor and the long axis of the alveolar bone in males is greater than that in females,and the degree of the angle in-creases with age.It is recommended to pay attention to the thickness of the bone wall around the root and the angle be-tween the teeth before immediate implantation surgery to choose a reasonable implantation plan.
