University of Michigan, Department of Cariology, Restorative Sciences and Endodontics, Ann Arbor, MI, USA.
J Dent Res. 2010 Aug;89(8):836-41. doi: 10.1177/0022034510369292. Epub 2010 May 28.
A minimally invasive caries-removal technique preserves potentially repairable, caries-affected dentin. Mineral-releasing cements may promote remineralization of soft residual dentin. This study evaluated the in vivo remineralization capacity of resin-based calcium-phosphate cement (Ca-PO(4)) used for indirect pulp-capping. Permanent carious and sound teeth indicated for extraction were excavated and restored either with or without the Ca-PO(4) base (control), followed by adhesive restoration. Study teeth were extracted after 3 months, followed by sectioning and in vitro microhardness analysis of the cavity floor to 115-microm depth. Caries-affected dentin that received acid conditioning prior to Ca-PO(4) basing showed significantly increased Knoop hardness near the cavity floor. The non-etched group presented results similar to those of the non-treated group. Acid etching prior to cement application increased microhardness of residual dentin near the interface after 3 months in situ.
一种微创去龋技术可保留具有修复潜力的、受龋影响的牙本质。释放矿物质的水门汀可能促进软残余牙本质的再矿化。本研究评估了用于间接盖髓的树脂基磷酸钙水泥（Ca-PO(4)）的体内再矿化能力。为了提取，挖掘出永久性龋齿和健康的牙齿，并用或不用 Ca-PO(4)基底（对照）进行修复，然后进行粘结修复。研究牙在 3 个月后被提取，然后进行切片，并对腔底 115μm 深度进行体外显微硬度分析。在进行 Ca-PO(4)基底处理前进行酸处理的受龋影响牙本质在腔底附近显示出明显增加的努氏硬度。未经酸蚀组的结果与未经处理组相似。在水泥应用前进行酸蚀可增加原位 3 个月后界面附近残余牙本质的显微硬度。
