Three-dimensional direction and interrelationship of prisms in cuspal and cervical enamel of dog tooth

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Abstract

The three-dimensional architecture of enamel prisms was examined in cuspal enamel and compared with that in cervical enamel by light and electron microscopy as well as computer-assisted reconstruction using the developing enamel of several dog teeth. Dog tooth enamel consists of two groups of alternately arranged enamel prisms oriented in opposite sideward directions basically forming thick horizontal rings, partly branching off from the stem. Along a 8-10 enamel prism-wide group, the enamel prisms emerge in parallel tilting uniformly to the same sideward direction. In cervices, groups of enamel prisms are arranged nearly in parallel displaying a regular arrangement of prisms. Approaching the cusp of tooth, the groups of enamel prisms fuse to a concentric cusp-centered arrangement and the prisms exhibit no periodic arrangement as shown in the cervical enamel. It is suggested that the three-dimensional structure of enamel becomes complicated close to the cusp, contributing to the chewing stress of tooth.

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APA

Hanaizumi, Y., Kawano, Y., Ohshima, H., Hoshino, M., Takeuchi, K., & Maeda, T. (1998). Three-dimensional direction and interrelationship of prisms in cuspal and cervical enamel of dog tooth. Anatomical Record, 252(3), 355–368. https://doi.org/10.1002/(SICI)1097-0185(199811)252:3<355::AID-AR3>3.0.CO;2-E

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