Characteristics of developmental anomalies in the permanent dentition of Jordanian orthodontic patients

الملخص EN

Objectives : To evaluate the frequency, distribution and gender differences of developmental permanent teeth anomalies with various malocclusions in a sample of Jordanian orthodontic patients.

Methods : A total of 1,500 non-syndromic orthodontic patients (750 females and 750 males), attended the Dental Departments at King Hussein Medical Center and Prince Rashed Bin Al-Hassan Hospital between July 2008 and September 2011, were included.

The study group comprised 180 orthodontic patients (96 females and 84 males), each with at least one developmental dental anomaly.

Their ages ranged from 13 to 22 years, with a mean of 16.8 years (± 3.6).

Dental history, pretreatment records, intra oral radiographs, and orthopantomograms were used for the diagnosis of various dental anomalies.

The following dental anomalies were identified, impacted teeth, transposition, transmigrant canines, ectopic eruption, peg-shaped lateral incisors, fusion, gemination, microdontia, macrodontia, oligodontia, hypodontia, hyperdontia, and amelogenesis imperfecta.

The chi-square test was used to investigate the gender differences and the occurrence rate in various malocclusions.

Results : In 180 (12 %) of 1500 orthodontic patients, at least one dental anomaly was detected.

The most frequent dental anomaly was impacted teeth (3.07 %).

Peg shaped maxillary lateral incisors were the most frequent anomalous teeth (1.27 %).

A significant predominance of hypodontia in females and hyperdontia in males was detected.

Impaction had a significantly lower frequency in Class II malocclusion.

Except for impaction, there were no statistically significant associations between dental anomalies and orthodontic malocclusions.

Conclusion : The characteristics of developmental dental anomalies in this sample of Jordanian orthodontic patients were comparable with the findings of most studies conducted in other countries.