title: Cervical headgear effects on the morphology of the cervical vertebrae and cervical posture.
abstract: OBJECTIVE
  To test the hypothesis that use of cervical headgear has an important effect on the morphology of the cervical vertebrae and cervical posture.
  
  
  METHODS
  The material consisted of pretreatment and posttreatment lateral cephalograms and initial hand-wrist films of 30 subjects who were receiving cervical headgear therapy. Preobservation and postobservation control cephalograms and preobservation hand-wrist films of 15 untreated subjects served as controls. The average treatment time for the treatment group was 9.06 +/- 1.02 months, and the average observation period for the control group was 10.0 +/- 1.1 months. A paired t-test was applied to compare the changes occurring during the examination and observation periods in both groups. In addition, Student's t-test was performed to assess the differences between the groups.
  
  
  RESULTS
  The results of the paired t-test showed that within each group there were statistically significant differences in the majority of measurements concerning the morphology of the cervical vertebrae, whereas the measurements concerning cervical posture showed no significant changes in either group. According to the results of the Student's t-test, however, no statistically significant changes between the treatment and control group were present except with regard to two measurements.
  
  
  CONCLUSIONS
  Changes in the cervicovertebral morphology in the treatment group were achieved more by growth than by cervical headgear treatment. Although high individual variations were found in postural variables, cervical posture did not change over a period of 9 months either in the treatment group or in the control group.
authors.affiliation: Department of Orthodontics, Faculty of Dentistry, Atatürk University, Turkey.
authors.forename: Ibrahim
authors.initials: I
authors.lastname: Yavuz
authors.forename: Betül
authors.initials: B
authors.lastname: Uzun
authors.forename: Bülent
authors.initials: B
authors.lastname: Baydaş
authors.forename: Ismail
authors.initials: I
authors.lastname: Ceylan
mesh_terms: D016022:Case-Control Studies; D002508:Cephalometry; D002574:Cervical Vertebrae / Q000033:anatomy & histology* / Q000000981:diagnostic imaging / Q000254:growth & development; D002648:Child; D005115:Extraoral Traction Appliances; D005260:Female; D006801:Humans; D008297:Male; D008312:Malocclusion, Angle Class II / Q000628:therapy*; D009971:Orthodontics, Corrective / Q000295:instrumentation*; D011187:Posture; D011859:Radiography; D015203:Reproducibility of Results; D012737:Sex Factors