(四)牙骨質(zhì)齲
口腔科學(xué)

        牙骨質(zhì)齲(cementum caries):多發(fā)生于牙齦萎縮、根面暴露后,由于牙骨質(zhì)生長(zhǎng)線圍繞牙根呈同心圓排列,導(dǎo)致病變圍繞牙根向側(cè)面擴(kuò)展,與其他病變?nèi)诤?因而形成環(huán)繞牙根的齲壞病變。Cementum caries :The cementum caries occur mostly after gingiral rece    （共 415 字）     [閱讀本文] >>