title: Measurement of cortical bone thickness in adults by cone-beam computerized tomography for orthodontic miniscrews placement.
abstract: The purpose of this study was to investigate the cortical bone thickness of the inter-dental area of both jaws for orthodontic miniscrew placement. The cone-beam computerized tomography images of 32 non-orthodontic adults with normal occlusion were taken to measure the cortical bone thickness in both jaws. One-way analysis of variance (ANOVA) was used to analyze the differences in cortical bone thickness. Buccal cortical bone in the mandible was thicker than that in the maxilla. In the maxilla, cortical bone thickness was thicker in the buccal side than in the palatal side. Buccal cortical bone thickness in the mandible was thickest at the site distal to the first molar, and in the maxilla it was thickest at the site mesial to the first molar, while in the palatal side of maxilla it was thickest at the site mesial to the second premolar. The changing pattern of cortical bone thickness varies at different sites. In the buccal side of maxilla, the thinnest cortical bone thickness was found to be at 4 mm level from the alveolar crest, while the thickest was at 10 mm level (except for the site mesial to the first premolar). The buccal cortical bone thickness at the sites mesial or distal to the first molar in the mandible and palatal cortical bone thickness of maxilla tended to increase with increasing distance from the alveolar bone.
authors.affiliation: Center of Stomatology, General Hospital of Chinese People's Armed Police Forces, Beijing, 100039, China.
authors.forename: Hong
authors.initials: H
authors.lastname: Zhao
authors.affiliation: Center of Stomatology, General Hospital of Chinese People's Armed Police Forces, Beijing, 100039, China.
authors.forename: Xiao-Ming
authors.initials: XM
authors.lastname: Gu
authors.affiliation: Institute of Stomatology, Division of Clinical Surgery, Chinese PLA General Hospital, Beijing, 100853, China. liuhongchen301@hotmail.com.
authors.forename: Hong-Chen
authors.initials: HC
authors.lastname: Liu
authors.affiliation: Institute of Stomatology, Division of Clinical Surgery, Chinese PLA General Hospital, Beijing, 100853, China.
authors.forename: Zhao-Wu
authors.initials: ZW
authors.lastname: Wang
authors.affiliation: Department of Orthodontics, Peking University School and Hospital of Stomatology, Beijing, 100081, China.
authors.forename: Chun-Lei
authors.initials: CL
authors.lastname: Xun
mesh_terms: D000328:Adult; D001863:Bone Screws; D054893:Cone-Beam Computed Tomography / Q000379:methods*; D003759:Dental Implantation, Endosseous, Endodontic / Q000295:instrumentation* / Q000379:methods; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible / Q000000981:diagnostic imaging* / Q000601:surgery*; D008437:Maxilla / Q000000981:diagnostic imaging* / Q000601:surgery*; D011861:Radiography, Dental / Q000379:methods; D015203:Reproducibility of Results; D012680:Sensitivity and Specificity; D025321:Surgery, Computer-Assisted / Q000379:methods; D055815:Young Adult