title: Evaluation of palatal bone density in adults and adolescents for application of skeletal anchorage devices.
abstract: OBJECTIVE
  To measure the cortical and cancellous bone densities of the palatal area in adolescents and adults and to compare bone quality among placement sites of temporary anchorage devices.
  
  
  METHODS
  One hundred twenty cone beam computerized tomography scans were obtained from 60 adolescents (mean age, 12.2 ± 1.9 years) and 60 adults (24.7 ± 4.9 years). The measurements of palatal bone density were made in Hounsfield units (HU) at 72 sites at the intersections of eight mediolateral and nine anterioposterior reference lines using InVivoDental software. Repeated-measures analysis of variance was used to analyze intragroup and intergroup differences.
  
  
  RESULTS
  The cortical and cancellous bone densities in the adults (816 and 154 HU, respectively) were significantly higher than those in the adolescents (606 and 135 HU; P < .001 and P  =  .032, respectively). However, the anterior portion of the cortical bone in adolescents had similar density values to the posterior portion of the cortical bone in adults. Gender comparison revealed that females had greater cortical bone densities (769 HU) than their male counterparts did (654 HU; P < .001).
  
  
  CONCLUSIONS
  Palatal bone densities were significantly higher in adults than in adolescents, and the anterior palatal areas of adolescents were of similar values to those at the posterior palate of adults.
authors.affiliation: Department of Orthodontics, St. Vincent Hospital, The Catholic University of Korea, Seoul, South Korea.
authors.forename: Seong
authors.initials: S
authors.lastname: Han
authors.forename: Mohamed
authors.initials: M
authors.lastname: Bayome
authors.forename: Jeongwon
authors.initials: J
authors.lastname: Lee
authors.forename: Yoon-Jin
authors.initials: YJ
authors.lastname: Lee
authors.forename: Hae-Hiang
authors.initials: HH
authors.lastname: Song
authors.forename: Yoon-Ah
authors.initials: YA
authors.lastname: Kook
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000704:Analysis of Variance; D015519:Bone Density / Q000502:physiology; D002648:Child; D054893:Cone-Beam Computed Tomography; D003794:Dental Restoration, Temporary; D005260:Female; D006801:Humans; D008297:Male; D010159:Palate / Q000033:anatomy & histology* / Q000000981:diagnostic imaging; D012737:Sex Factors
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