title: Cephalometric evaluation of the changes in mandibular symphysis after 7 years of denture wearing.
abstract: OBJECTIVE
  To evaluate changes in mandibular symphysis during 7 years of complete denture wearing following extraction of natural anterior teeth.
  
  
  METHODS
  Comparison among measurements taken at four different occasions in a prospective cephalometric study.
  
  
  METHODS
  The study was conducted at the Dental School of Athens University.
  
  
  METHODS
  10 complete denture wearers (5 women, 5 men) with average age of 53.2 years, at the beginning of the study.
  
  
  METHODS
  Linear and area measurements of the mandibular symphysis.
  
  
  RESULTS
  The overall reduction in the anterior mandibular height was 7.87 mm and in the mandibular symphysis area 54.8 mm2 (p < 0.05). Females presented higher total average reduction in both variables tested, and more rapid bone loss during the first two years of denture wear, compared to men. Superimposition of the tracings revealed considerable individual variation in mandibular symphysis changes.
  
  
  CONCLUSIONS
  Results are in line with the findings of other authors indicating continuous reduction and dramatic inter-subject variation in the mandibular alveolar bone, following extraction of natural teeth and wearing of complete dentures.
authors.affiliation: Department of Removable Prosthodontics, Dental School, University of Athens. remprath@internet.gr
authors.forename: H C
authors.initials: HC
authors.lastname: Karkazis
authors.forename: J
authors.initials: J
authors.lastname: Lambadakis
authors.forename: K
authors.initials: K
authors.lastname: Tsichlakis
mesh_terms: D016301:Alveolar Bone Loss / Q000209:etiology*; D000704:Analysis of Variance; D002508:Cephalometry; D002680:Chin; D003826:Denture, Complete, Lower / Q000009:adverse effects*; D005260:Female; D006801:Humans; D008297:Male; D008334:Mandible / Q000473:pathology*; D008875:Middle Aged; D011446:Prospective Studies; D012737:Sex Factors; D014716:Vertical Dimension