Fusion and Gemination of the Permanent Teeth

Fuzija zuba nastaje u stadiju zubnog zametka, a označava spajanje dvaju ili više zubnih tkiva, dva ili više zuba. Geminacija označava dva različita morfološka entiteta nastala iz jednog zubnog zametka. Kliničkim i radiografskim pregledom teško je razlučiti fuziju od geminacije. Stoga oba morfološka entiteta nazivamo zajedničkim imenom »dvostruki zub« (engl: double tooth). U ovom ispitivanju pregledali smo 2.832 gipsana odljeva zubi osoba obaju spolova, pacijenata Zavoda za ortodonciju Stomatološkog fakulteta Sveučilišta u Zagrebu. Morfološka anomalija »dvostruki zub« nađena je kod tri dječaka na gornjim trajnim središnjim sjekutićima (0,9%). Povezanost ove anomalije s drugim odontogenim nepravilnostima nismo ustanovili.Morphological anomalies o f the teeth may appear in every developmental stage o f the embryological life and they result in different morphological entities. Due to the difficulty in distinguishing fusion from gemination, both morphologic entities are called »double tooth«. The purpose of this study was to establish the frequency of the »double tooth«, distribution of anomalies between sex and their association with other odontogenic anomalies. The investigation was carried out on the 2832 plaster models from the Department of Orthodontics, School of Dentistry, University of Zagreb. The »double tooth« has been found in three male patients (0,9%). In both cases the anomalies affected the upper permanent central incisors. The association with other odontogenic anomalies was not found