engleski

Numeric Anomallies of Teeth in Turner and Klinefelter Syndrome Patients

Numeric anomalies of teeth in patients with gonadal dysgenesis were analyzed in this study. The subjects were Turner syndrome (TS) and Klinefelter syndrome (KS) patients, 40 in each group. The diagnosis of hypo/hyper-dontia was based on anamnesis, dental exam and orthopantomograms. In cases where it could not be established whether there was hypodontia or the tooth was previously extracted, the patients were excluded from statistical analyses for the consecutive tooth. Only permanent teeth were evaluated and the analysis did not comprise third molars hypodontia. The findings were compared to data found in literature. Hypodontia was found only in the upper jaw in both groups. Three TS patients (out of 40) had lateral incisor hypodontia: in one case unilateral and in two cases bilateral. One KS patient (out of 31) had bilateral hypodontia of the lateral incisor and another (one out of 17) had unilateral hypodontia of the second premolar. While there was no hyperdontia in KS patients, in three TS patients unerupted distomolars were found in both jaws and in only one case the condition was bilateral. One TS patient had concomitant hypo-hyperdontia: bilateral hypodontia of the upper lateral incisor and unilateral conical distomolar in the lower jaw. Additionally, between distomolar and the tooth 48 the radicular odontoid was visible. The frequency of hypodontia in TS group was similar to that reported for orthodontic patients (OP): 7.5 % compared to 4.5 - 8.0 %, whereas somewhat less in KS group. Hyperdontia was more frequent in TS patients than in OP: 7.5 % compared to 0.7 %. Conclusion. Lack of X-chromosome can be related to supernumerary tooth formation. Hypodontia found in the investigated sample can be considered a reflection of normal variation rather than a part of Turner or Klinefelter syndrome.

hypodontia; hyperdontia; Turner syndrome; Klinefelter syndrome

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