Prevalence and characteristics of hyperdontia among Jordanian nonsyndromic orthodontic patients

الملخص EN

Objectives : to investigate the distribution and characteristics of nonsyndromic hyperdontia in a sample of Jordanian orthodontic patients.

Methods : a total of 2140 non-syndromic orthodontic patients (1070 females and 1070 males), attended the Dental Department at Prince Hashem Bin Al- Hussien Hospital between July 2013 and April 2015, were included in this study.

Their ages ranged from 6 to 16 years, with a mean of 13.8 years (± 2.6).

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

Patients were evaluated for age, gender, status of dentition, number, position, orientation, and type of supernumerary teeth.

The Pearson chi- square test was used for statistical analysis.

Results : In 51 (2.38 %) of 2140 orthodontic patients, at least one supernumerary tooth was detected (70 supernumerary teeth in 33 males and 18 females).

A significant predominance of hyperdontia in males (1.83:1; P = 0.038) was detected.

Most supernumerary teeth were single (51.43 %), conical (47.14 %), normally oriented (57.14 %), impacted (78.57 %), located in the premaxilla (52.86%) and detected in mixed dentition (58.82 %).

Conclusion : A hyperdontia prevalence of (2.38 %) was detected with a significant male predominance.

The characteristics of supernumerary teeth in this sample of Jordanian nonsyndromic orthodontic patients were comparable with the findings of most studies conducted in other countries.