Ooë T
Acta Anat (Basel). 1975;92(2):259-71.
Up to the cap-stage the lateral enamel strand extends from the dental lamina to the tip of the tongue-like projection of the enamel organ, forming there a swelling. It does not reach the free margin of the enamel organ at the bell-stage. The lateral enamel strand gradually becomes smaller in regard to the tooth germ, changing its relative position to the mesial half of the latter, and finally degenerates. In the molar germ, as the epithelial tongue-like projection at the cap-stage increases in length to become an interradical process, the lateral enamel strand extends as a crest on the buccal interradical process. The direction of the lateral enamel strand is inverse in the maxillary molar germs.
到帽状期时，外侧釉质条索从牙板延伸至釉器舌状突起的尖端，并在那里形成一个肿胀。在钟状期时，它未到达釉器的游离缘。外侧釉质条索相对于牙胚逐渐变小，改变了其相对于牙胚近中半部分的相对位置，最终退化。在磨牙胚中，帽状期时上皮舌状突起伸长成为根间突，外侧釉质条索作为颊侧根间突上的嵴延伸。上颌磨牙胚中外侧釉质条索的方向相反。
