title: Effect of complete dentures on dynamic measurement of changing head position: A pilot study.
abstract: BACKGROUND
  Complete dentures contribute significantly to the facial esthetics of edentulous patients. However, information as to the effect of complete dentures on the natural position of the head is limited.
  
  
  OBJECTIVE
  The purpose of this pilot study was to evaluate the immediate and 30-day effect of wearing complete dentures on the dynamic natural head position measured during walking.
  
  
  METHODS
  The sample consisted of a volunteer group of 16 patients, 8 women and 8 men, who received new complete dentures. The ages of the subjects ranged from 45 to 64 years (mean=52 years). Dynamic measurement of head posture was carried out by a specially constructed inclinometer device. Each subject in turn was fitted with the inclinometer system and instructed to walk in a relaxed manner for 5 minutes. The data, measured as degrees, were stored in a pocket data logger. This procedure was repeated before insertion of dentures (T1), immediately after insertion of dentures (T2), and 30 days after insertion of dentures (T3). Stored dynamic head posture data were transferred to computer for analysis. The means of the measurements were statistically compared with Friedman and following Wilcoxon tests (alpha =.05).
  
  
  RESULTS
  Twelve of 16 (75%) subjects showed an average of 4.6 degrees of cranial extension immediately after insertion of dentures. Six (37.5%) subjects showed an average of 6.4 degrees of cranial flexion, and 8 (50%) subjects showed an average of 5.2 degrees of cranial extension at T3 relative to the T1 measurement. Dynamic head posture measurements of the other 2 subjects remained unchanged. There were significant differences between different measurements of dynamic head posture positions (P<.025). However, only the T1 and T2 measurements were significantly different (P<.015).
  
  
  CONCLUSIONS
  The findings indicate that the statistically significant average extension 4.6 degrees in subjects immediately after insertion of complete dentures was not stable after a 30-day evaluation period and did not produce any statistically significant change. The overall effect of wearing dentures was an irregular flexion or extension pattern on dynamic head posture.
authors.affiliation: Department of Prosthodontics, Selçuk University, Ankara, Turkey.
authors.forename: Aslihan
authors.initials: A
authors.lastname: Usumez
authors.forename: Serdar
authors.initials: S
authors.lastname: Usumez
authors.forename: Metin
authors.initials: M
authors.lastname: Orhan
mesh_terms: D003767:Dental Occlusion, Balanced; D003824:Denture, Complete; D005260:Female; D005500:Follow-Up Studies; D006257:Head / Q000033:anatomy & histology*; D006801:Humans; D007091:Image Processing, Computer-Assisted; D008297:Male; D008875:Middle Aged; D010865:Pilot Projects; D011187:Posture; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation; D018709:Statistics, Nonparametric; D016138:Walking