APP 橫紋(cross striations):為釉柱上有規(guī)律間隔的細(xì)線,橫紋之間的距離約為 4μm,相當(dāng)于釉基質(zhì)每日形成的量。橫紋處礦化程度稍低,故當(dāng)牙輕度脫礦時(shí)橫紋較明顯。Cross striations:Enamel rods have regularly spaced cross striations and the distance between the （共 424 字） [閱讀本文] >>
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橫紋(cross striations):為釉柱上有規(guī)律間隔的細(xì)線,橫紋之間的距離約為 4μm,相當(dāng)于釉基質(zhì)每日形成的量。橫紋處礦化程度稍低,故當(dāng)牙輕度脫礦時(shí)橫紋較明顯。Cross striations:Enamel rods have regularly spaced cross striations and the distance between the （共 424 字） [閱讀本文] >>
