Hypodontia. Does the Prevalence and Distribution Pattern Differ in Orthodontic Patients?

Abstract

ObjectiveThe aim of this study was to document the prevalence of hypodontia in the permanent dentition among a group of Turkish sample who sought orthodontic treatment and to compare present results with the specific findings of other populations. The occurrence was evaluated in relation to gender, specific missing teeth, the location and pattern of distribution in the maxillary and mandibular arches and right and left sides.Materials And MethodsOrthodontic files of 2413 patients (1557 females-mean age: 17.78±5.41 years old and 856 males-mean age:17.02±5.47 years old) which included orthopantomograms, study models, and anamnestic data were examined for evidence of hypodontia.ResultsThe prevalence of hypodontia was 7.54% (8.09% for female and 6.54% for male). Hypodontia was found considerably more frequently in the maxilla than in the mandible. Similarity in the distribution of missing teeth between the right and left sides was detected. The most frequently missing teeth were the maxillary lateral incisors, followed by the mandibular and maxillary second premolars. The majority of patients had one or two teeth missing, but seldom three or more.ConclusionsPresent data for hypodontia were within the wide range reported in the literature. The findings of patients with hypodontia involving the anterior teeth and others missing more than two teeth in the same quadrant were an indication of a great need for orthodontic treatment. By early detection of missing teeth, alternative treatment modalities can be planned and performed with a multidisciplinary team approach.

Lateral incisor agenesis, canine impaction and characteristics of supernumerary teeth in a South European male population

“…[2930] A possible explanation may be the higher dental awareness and esthetic anxiety of individuals seeking orthodontic treatment. [12] With respect to the location of agenesis, missing mandibular laterals are rarely encountered in literature,[3132] and none have been diagnosed in our study sample. There is a difference in agenesis between the right and left sides, which is consistent with the previous investigations.…”

Hypodontia Prevalence over Four Decades in a Slovenian Population

“…In Europe, the prevalence of congenitally missing permanent teeth was 7.9% in Iceland (males 6.7%; females 8.9%), 7.8% in Denmark (males 7.7%; females 7.8%), and 7.4% in Sweden (males 6.5%; females 8.4%) . The prevalence might differ considerably even in studies conducted in one country (2.6–6.5% in Turky; 4.5–6.5% in Norway . In addition, the prevalence of congenitally missing permanent teeth was 2.5% in Saudi Arabia, 4.6% in Israel, and 6.9% in Hong Kong population.…”

A retrospective cross-sectional study on the prevalence of hypodontia in a target population of Al-Jouf Province, Saudi Arabia

“…However, the literature does not confirm this as some studies on orthodontic patients showed a higher prevalence in females,[161718] whereas others did not find any such difference,[19] and some studies even reported greater prevalence rates in male orthodontic patients. [202122]…”

“…This finding is consistent with other previously reported data and is in agreement with the general consensus that the most distal tooth of any particular type is the most likely to be affected. [1522] However, in some studies, the most distal tooth agenesis (i.e., third molar agenesis) is also associated with missing teeth from other classes of teeth. [8] In contrast, Nuvvula et al .…”