[Radiographic evaluation of dental malocclusion and elongation of the teeth in rabbits: a retrospective study]

Aquired dental disease is characterized by deterioration of tooth quality, acquired malocclusion and elongation of the teeth roots. By now, there is no study to show incidence rate of dental diseases in Iranian pet rabbits. The aim of this study is to investigate types of disorders [dental malocclusion and elongation of the teeth roots] and rate of dental diseases based on information received from radiographs prepared from referred rabbits to Small animals Hospital, Faculty of Veterinary Medicine, University of Tehran, Iran. During three years [2004-2007] 64 out of 239 radiographs were related to dental disorders in rabbits. Among 64 studied radiographs, 23.44% were affected by stage I of the disease and the same rate was affected by the stage II. Almost 37.5% of the affected rabbits showed signs of stage III of the disease which were accompanying with malocclusion and loss of zigzag occlusal pattern of upper and lower cheek teeth. 15.62% were affected by stage IV of the disease, no affected cases with stage V was shown. These results showed high occurrence rate of tooth root elongation and malocclusion [about 64.06%] in referred pet rabbits to the University of Tehran Veterinary hospital

Alterações orais em três espécies de Leontopithecus mantidas em cativeiro (Callitrichidae, Primates) / Dental changes in three species of Leontopithecus maintained in captivity (Callitrichidae, Primates)

Foram estudadas as alterações orais que ocorrem em primatas não humanos, cativos, do gênero Leontopithecus, suas diferenças entre espécies, suas freqüências e a influência do cativeiro. Sessenta crânios de Leontopithecus, do acervo do Museu Primatológico do Centro de Primatologia do Rio de Janeiro (CPRJ-FEEMA), foram examinados. O teste do x² foi utilizado para avaliar as diferenças nas incidências das alterações orais e o coeficiente de correlação de Pearson para o estudo da correlação entre o número de alterações e o tempo de cativeiro dos animais. Entre as três espécies estudadas, L. chrysomelas, L. rosalia e L. chrysopygus, as diferenças nas alterações orais foram estatisticamente significativas para cáries, crazing, doença pulpar e maloclusão. O complexo canino-incisivo foi mais afetado do que a série molar. A incidência de alterações orais aumentou à medida que aumentou o tempo de cativeiro dos micos e diferiu nas três espécies de Leontopithecus estudadas, sendo L. chrysopygusi a mais suscetível.

The dental changes occurring in captive non-human primates of the genus Leontopíthecus and its differences among three species, L. chrysomelas, L. rosalía and L. chrysopygus, regarding frequency and captivity influence, were studied. Sixty skulls of the Leontopíthecus, trom the collection of the Museum of Centro de Primatologia do Rio de Janeiro (CPRJ-FEEMA) were examined. The x² test was used to evaluate the differences between incidence of changes observed and Pearson's coefficient of correlation to evaluate the number of changes observed and the time of captivity. The differences among the three species were significant for caries, crazing, pulpar disease and malocclusion. The complex canine-incisors were more affected than the molars. The incidence of oral changes was high in animais maintained more time in captivity conditions and was different in the three species of the Leontopíthecus studied; L. chrysopygus was the most susceptible.