title: Palatal bone thickness compared with cone-beam computed tomography in adolescents and adults for mini-implant placement.
abstract: BACKGROUND
  The purpose of this study was to compare the bone thickness of the palatal areas in early and late mixed and early permanent dentitions according to dental age.
  
  
  METHODS
  Cone-beam computed tomography scans of 118 subjects were selected and divided into 38 early mixed (8.03 ± 0.93 years), 40 late mixed (11.51 ± 0.92 years), and 40 permanent (20.92 ± 1.17 years) dentition subjects. The measurements of palatal bone thickness were made at 49 sites by using InVivoDental5.0 software (Anatomage, San Jose, Calif). Repeated measures analysis of variance was used to analyze intragroup and intergroup differences as well as sex dimorphism.
  
  
  RESULTS
  There was significantly lower bone thickness in the early mixed dentition group than in the 2 other groups (P <0.001). Bone thickness was higher in the anterior region than in the middle and posterior regions (P <0.001). Also, significant differences were found among the midline, medial, and lateral areas of the palate.
  
  
  CONCLUSIONS
  Palatal bone thicknesses were significantly lower in the early mixed dentition group than in both the late mixed and permanent dentition groups. These findings might be helpful for clinicians to enhance the successful use of temporary anchorage devices in the palate.
authors.affiliation: Former resident, Department of Orthodontics, Seoul St. Mary's Hospital, The Catholic University of Korea, Seoul, Korea.
authors.forename: Jun-Ha
authors.initials: JH
authors.lastname: Ryu
authors.forename: Jae Hyun
authors.initials: JH
authors.lastname: Park
authors.forename: Trang
authors.initials: T
authors.lastname: Vu Thi Thu
authors.forename: Mohamed
authors.initials: M
authors.lastname: Bayome
authors.forename: YoonJi
authors.initials: Y
authors.lastname: Kim
authors.forename: Yoon-Ah
authors.initials: YA
authors.lastname: Kook
mesh_terms: D000293:Adolescent; D000367:Age Factors; D002508:Cephalometry / Q000379:methods*; D002648:Child; D054893:Cone-Beam Computed Tomography / Q000379:methods*; D003393:Cranial Sutures / Q000000981:diagnostic imaging / Q000473:pathology; D015921:Dental Implants; D003818:Dentition, Mixed; D006801:Humans; D007091:Image Processing, Computer-Assisted / Q000379:methods; D052280:Orthodontic Anchorage Procedures / Q000295:instrumentation*; D021362:Palate, Hard / Q000000981:diagnostic imaging* / Q000473:pathology; D012737:Sex Factors; D055815:Young Adult
chemical_list: D015921:Dental Implants