Tveit A B, Selvig K A
Scand J Dent Res. 1981 Feb;89(1):38-42. doi: 10.1111/j.1600-0722.1981.tb01275.x.
Acid-treatment of root surfaces as adjunct to periodontal reconstructive surgery may have deleterious effects on that part which remains in a supragingival location after healing. The present experiment aimed to examine whether recalcification of such root surfaces may occur. Cylindrical blocks of root dentin were prepared for 10 premolars, treated with citric acid and mounted in acrylic specimen holders which were worn in the mouth continuously for 14 d by two test subjects. The specimens were then sectioned and microradiographs produced. The citric acid had produced a completely demineralized surface zone in the root dentin and the subjacent hard tissue showed a zone of partially reduced mineral content. Following exposure to the oral cavity, the demineralized surface layer appeared unchanged in width. The subjacent zone, however, had been reduced in width in all instances when compared with control specimens from the same teeth.
作为牙周重建手术辅助手段的牙根表面酸处理，可能会对愈合后仍处于龈上位置的部分产生有害影响。本实验旨在研究此类牙根表面是否会发生再钙化。为10颗前磨牙制备了圆柱形牙本质块，用柠檬酸处理后安装在丙烯酸标本架上，两名受试对象将其连续佩戴在口腔中14天。然后将标本切片并制作显微放射照片。柠檬酸在牙根牙本质中产生了一个完全脱矿的表面区域，其下方的硬组织显示出矿物质含量部分降低的区域。暴露于口腔后，脱矿表面层的宽度似乎没有变化。然而，与同一颗牙齿的对照标本相比，所有情况下其下方区域的宽度都减小了。
