Aims of study: 1-To determine the prevalence and 2- the pattern of hypodontia in
the permanent dentition in a sample of Syrian orthodontic patients who sought orthodontic
treatment.
Materials and Methods: The orthodontic records of 623 patients ag
ed 12 to 34, who
sought orthodontic treatment in the Department of Orthodontics, Dental faculty/Damascus
University, during the last three years (2011-2014), were investigated to establish the
prevalence of patients with one or more permanent missing teeth.
Results: 1-The prevalence of hypodontia was 7.10% of the studied sample (7.49% in
females, and 6.35% in males). Males were less affected than females with a ratio of 1:1.18
with no significant differences between genders (P = 0.063).
2-The most common missing tooth was maxillary lateral incisor (56.52%), the least
common missing tooth was maxillary first molar (0.87%). Missing in the maxillary jaw
was significantly more frequent than the mandible (P=0.041( with significantly more
anterior teeth missing than posterior teeth (P=0.009).
Conclusions: The prevalence of hypodontia showed in this study was within the
range published in the literature. The patterns are similar to most reported patterns in the
literature.
