Erupção dental em pacas (Agouti paca) criadas em cativeiro
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Data
2007-04-01
Autores
Oliveira, F.S. [UNESP]
Canola, J.C. [UNESP]
Título da Revista
ISSN da Revista
Título de Volume
Editor
Universidade Federal de Minas Gerais (UFMG), Escola de Veterinária
Resumo
Fez-se o acompanhamento radiográfico mensal da erupção dental de cinco fêmeas e sete machos da espécie Agouti paca durante 30 meses. Os animais foram radiografados mês-a-mês. As pacas nasceram com três dentes em cada hemiarcada dental, um incisivo de crescimento contínuo por toda a vida, um pré-molar decíduo (o único que é decíduo) e um molar. No quarto mês houve a erupção do segundo molar. O nivelamento da superfície de oclusão dos dentes inferiores ocorreu no sexto mês e o dos superiores ao redor do nono mês. No 14° mês, houve o início da erupção do terceiro molar e, no 16° mês, a evidenciação radiográfica do pré-molar permanente, ainda com preservação de correspondente decíduo. No 21° mês, ocorreu o nivelamento da superfície de oclusão dos quatro dentes superiores e inferiores. Entre o 22° e o 24° mês, iniciou-se a queda dos pré-molares decíduos inferiores e, entre o 23º e o 24° mês, a dos superiores. Entre o 24º e o 25º mês, a superfície de oclusão dos dentes inferiores estava nivelada, e a dos dentes superiores aconteceu no 27º mês.
Five females and seven males of Agouti paca were used to study dental eruption. In a monthly radiographic survey of the dental eruption, during 30 consecutive months, animals were radiographed. Pacas were born with three teeth in each dental hemiarcade, one incisor of continuous growth, one premolar (the only one deciduous) and one molar. The second molar erupted in the fourth month. The occlusal surfaces of lower teeth were at the same level in the sixth month and the upper teeth around ninth month. The beginning of the third molar eruption occurred in the 14th month. Perception of the first permanent premolar was around the 16th month, and its correspondent deciduous was still retained. The occlusal surfaces of upper and lower teeth were at the same level in the 21st month. The eruption of the first lower deciduous premolar occurred between the 22nd and 24th month and the upper´s between the 23rd and 24th month. The occlusal surfaces of lower teeth were at the same level between the 24th and 25th month and the upper's on the 27th month.
Five females and seven males of Agouti paca were used to study dental eruption. In a monthly radiographic survey of the dental eruption, during 30 consecutive months, animals were radiographed. Pacas were born with three teeth in each dental hemiarcade, one incisor of continuous growth, one premolar (the only one deciduous) and one molar. The second molar erupted in the fourth month. The occlusal surfaces of lower teeth were at the same level in the sixth month and the upper teeth around ninth month. The beginning of the third molar eruption occurred in the 14th month. Perception of the first permanent premolar was around the 16th month, and its correspondent deciduous was still retained. The occlusal surfaces of upper and lower teeth were at the same level in the 21st month. The eruption of the first lower deciduous premolar occurred between the 22nd and 24th month and the upper´s between the 23rd and 24th month. The occlusal surfaces of lower teeth were at the same level between the 24th and 25th month and the upper's on the 27th month.
Descrição
Palavras-chave
dental eruption, Agouti paca, Captivity, Paca, erupção dental, cativeiro
Como citar
Arquivo Brasileiro de Medicina Veterinária e Zootecnia. Universidade Federal de Minas Gerais, Escola de Veterinária, v. 59, n. 2, p. 390-394, 2007.