Department of Prosthodontics, College of Dentistry, Chosun University, Gwangju, Korea.
J Adv Prosthodont. 2010 Sep;2(3):92-6. doi: 10.4047/jap.2010.2.3.92. Epub 2010 Sep 30.
The aim of this study was to evaluate the thickness of buccal and palatal alveolar bone and buccal bony curvature below root apex in maxillary anterior teeth of Korean adults using Cone-beam CT images.
The 3D image was reconstructed with dicom file obtained through CBCT from 20 - 39 year old Korean subjects (n = 20). The thickness of buccal and palatal plate, root diameter, the buccal bony curvature angle below root apex and the distance from root apex to the deepest point of buccal bony curvature were measured on maxillary anterior teeth area using OnDemand3D program.
Mean thickness of buccal plate 3 mm below CEJ was 0.68 ± 0.29 mm at central incisor, 0.76 ± 0.59 mm at lateral incisor, and 1.07 ± 0.80 mm at canine. Mean thickness of palatal plate 3 mm below CEJ was 1.53 ± 0.55 mm of central incisor, 1.18 ± 0.66 mm of lateral incisor, 1.42 ± 0.77 mm of canine. Bucco-lingual diameter 3 mm below CEJ was 5.13 ± 0.37 mm of central incisor, 4.58 ± 0.46 mm of lateral incisor, and 5.93 ± 0.47 mm of canine. Buccal bony curvature angle below root apex was 134.7 ± 17.5° at central incisor, 151.0 ± 13.9° at lateral incisor, 153.0 ± 9.5° at canine. Distance between root apex and the deepest point of buccal bony curvature of central incisor was 3.67 ± 1.28 mm at central incisor, 3.90 ± 1.51 mm at lateral incisor, and 5.13 ± 1.70 mm at canine.
Within the limitation of this study in Korean adults, the thickness of maxillary anterior buccal plate was very thin within 1mm and the thickness of palatal plate was thick, relatively. The buccal bony curvature below root apex of maxillary central incisor was higher than that of lateral incisor and canine and it seems that the buccal bony plate below root apex of central incisor is most curved.
本研究旨在通过锥形束 CT 图像评估韩国成年人上颌前牙颊侧和腭侧牙槽骨及根尖下颊侧骨曲度的厚度。
从 20 至 39 岁的韩国受试者（n = 20）的 CBCT 获得 dicom 文件，重建 3D 图像。使用 OnDemand3D 程序测量上颌前牙区域的颊侧和腭侧板厚度、根直径、根尖下颊侧骨曲度角以及从根尖到颊侧骨曲度最深处的距离。
CEJ 下 3mm 处颊侧板的平均厚度为中切牙 0.68 ± 0.29mm，侧切牙 0.76 ± 0.59mm，尖牙 1.07 ± 0.80mm。CEJ 下 3mm 处腭侧板的平均厚度为中切牙 1.53 ± 0.55mm，侧切牙 1.18 ± 0.66mm，尖牙 1.42 ± 0.77mm。CEJ 下 3mm 处颊舌径为中切牙 5.13 ± 0.37mm，侧切牙 4.58 ± 0.46mm，尖牙 5.93 ± 0.47mm。根尖下颊侧骨曲度角在中切牙为 134.7 ± 17.5°，侧切牙为 151.0 ± 13.9°，尖牙为 153.0 ± 9.5°。中切牙根尖与颊侧骨曲度最深处的距离为 3.67 ± 1.28mm，侧切牙为 3.90 ± 1.51mm，尖牙为 5.13 ± 1.70mm。
在本研究中，韩国成年人上颌前牙颊侧板的厚度在 1mm 以内非常薄，而腭侧板较厚。上颌中切牙根尖下颊侧骨曲度高于侧切牙和尖牙，似乎中切牙根尖下颊侧骨板最弯曲。
