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Prevalence of tooth transpositions and associated dental anomalies in a Turkish population

HH Ylmaz^*,1, H Türkkahraman² and MÖ Sayn²

¹ Department of Oral Diagnosis and Radiology, Faculty of Dentistry, Süleyman Demirel University, Isparta, Turkey; ² Department of Orthodontics, Faculty of Dentistry, Süleyman Demirel University, Isparta, Turkey

*Correspondence to: Hasan Hüseyin Ylmaz, Department of Oral Diagnosis and Radiology, Faculty of Dentistry, Süleyman Demirel University, Dogu Kampus, Cunur, Isparta, Turkey; Email: hyilmaz{at}dishek.sdu.edu.tr, huseyinyeni{at}yahoo.com

Received 8 June 2004; revised 3 December 2004; accepted 3 December 2004

Objectives: The aims of this study were to determine the prevalence of tooth transposition in a Turkish population, possibly associated dental anomalies and whether side laterality, gender expression or genetic influence exist or not.

Methods: Panoramic radiographs of 5486 patients referred to Department of Oral Diagnosis and Radiology, University of Süleyman Demirel between April 2003 and March 2004 were examined retrospectively. All patients with tooth transpositions were recalled for detailed clinical examination and medical history. Age, sex, history (trauma), location of transposition, and associated congenital dental anomalies were recorded with details.

Results: 22 transpositions were found in 21 of 5486 (0.38%) patients. The most frequently seen transposition was maxillary canine-lateral incisor (1.64/1000), secondly maxillary canine-first premolar (0.91/1000) and maxillary canine-second premolar (0.18/1000) was the least frequently seen one. The frequencies of right and left side occurrence were equal (11/11). Each sex was affected similarly (11 males, 10 females).

Conclusions: The prevalence of tooth transposition was 0.38% in a Turkish population. Maxillary canine-lateral incisor transposition was found to have a higher frequency than maxillary canine-first premolar transposition. Maxillary canine-second premolar transposition that had not been previously reported in the literature was observed in one of our cases. Transpositions had similar frequencies in both sexes.

Keywords: transposition; prevalence; tooth abnormalities; aetiology

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