Grevstad H J, Selvig K A
Scand J Dent Res. 1982 Jun;90(3):173-81. doi: 10.1111/j.1600-0722.1982.tb00724.x.
Permanent incisors from fetal New Zealand white rabbits aged 25-30 d in utero were processed for light microscopy. Examination of transverse and longitudinal sections of demineralized specimens revealed the development of a complete enamel covering of the incisal tip and an enamel extension on the linguoincisal surface of unerupted teeth, as evidenced by the presence and distribution of ameloblasts, enamel matrix and enamel space. Formation of lingual enamel appeared to be completed within a few days before eruption of the incisor. The transition from the enamel-covered to enamel-free areas coincided with a gradual disintegration of the orderly ameloblast layer. The findings indicate that, histologically, the linguoincisal part of the rabbit permanent incisor is characterized by amelogenesis.
对子宫内25 - 30天龄的新西兰白兔胎儿的恒切牙进行光镜检查。对脱矿标本的横切面和纵切面检查显示，切牙尖端形成了完整的釉质覆盖层，未萌出牙的舌切面上有釉质延伸，成釉细胞、釉质基质和釉质间隙的存在及分布证明了这一点。舌侧釉质的形成似乎在切牙萌出前几天内完成。从釉质覆盖区域到无釉质区域的转变与有序的成釉细胞层逐渐解体相吻合。研究结果表明，从组织学上看，兔恒切牙的舌切部分具有釉质形成的特征。
