title: Tooth Size in Patients with Mild, Moderate and Severe Hypodontia and a Control Group.
abstract: OBJECTIVE
  To compare tooth size between subjects with mild, moderate and severe hypodontia and a control group.
  
  
  METHODS
  The study comprised 120 patients with hypodontia divided into three groups of 40 mild (≤2 teeth congenitally missing), 40 moderate (3-5 teeth congenitally missing) and 40 severe (≥6 teeth congenitally missing) hypodontia; and 40 age and sex matched controls. Tooth size was recorded by measuring the mesiodistal and buccolingual dimensions of all fully erupted teeth on study models using digital callipers and compared between all hypodontia and control groups using Two-way ANOVA and Post Hoc Tests of subgroup comparison.
  
  
  RESULTS
  Two-way ANOVA revealed patients with hypodontia had significantly smaller mesiodistal and buccolingual tooth dimensions compared with controls (p<0.05). Furthermore patients with more severe hypodontia demonstrated significantly smaller tooth dimensions than those in the mild and moderate hypodontia subgroups (p<0.05). The most affected tooth in terms of tooth size reduction was the maxillary lateral incisor and the least affected tooth was the mandibular first molar.
  
  
  CONCLUSIONS
  Patients with hypodontia have smaller tooth dimensions than control. Tooth size appears to be affected by the degree of hypodontia, with severe hypodontia having a greater effect on tooth size reduction. The findings of this study may contribute to understanding the aetiology of hypodontia and aid the multidisciplinary management of this complex condition.
authors: Department of Orthodontics, King Faisal University, Al Ahsa, KSA.
authors: Khaled
authors: K
authors: Khalaf
keywords: Congenitally; Dimension; Hypodontia; Missing; Size; Tooth