Navarro J A, Stottovia-Filho D, Leite-Ribeiro M C, Taga R
Arch Histol Jpn. 1975 Jun;38(1):17-30. doi: 10.1679/aohc1950.38.17.
The development and sequence of eruption of the maxillary cheek-teeth of rabbits were studied by histological methods. The presence of three deciduous molars which were replaced by correspondent premolars and of three permanent molars without predecessors was confirmed. The eruption of the maxillary deciduous molars was shown to begin at 4 days postnatally and that of the permanent molar at 9 days, while the eruption of the premolars occurs from 24 days on, replacing the deciduous molars which are exfoliated. The last tooth to erupt is the M3. At 32 days all the permanent cheek-teeth are erupted. The deciduous molars are completely developed at birth, root resorption starting at 4 days. On the first day the premolars are in the bell stage and in the M1 and M2 amelogenesis is taking place. After 27 days the development of the permanent maxillary cheek-teeth is completed. Dentinogenesis, amelogenesis and cementogenesis were observed in all of them.
采用组织学方法研究了家兔上颌颊齿的发育及萌出顺序。证实存在三颗乳磨牙，它们被相应的前磨牙替代，还有三颗没有乳牙前身的恒磨牙。上颌乳磨牙的萌出在出生后4天开始，恒磨牙在9天开始，而前磨牙从24天开始萌出，替换脱落的乳磨牙。最后萌出的牙齿是M3。32天时，所有恒颊齿均已萌出。乳磨牙在出生时已完全发育，牙根吸收从4天开始。第一天，前磨牙处于钟状期，M1和M2正在进行釉质形成。27天后，上颌恒颊齿发育完成。在所有颊齿中均观察到牙本质形成、釉质形成和牙骨质形成。
