Читать книгу Applied Oral Physiology - Robin Wilding - Страница 26

Few dental restorations last a lifetime. Most eventually have to be replaced, either because they break down or because caries recurs. It used to be thought that recurrent or secondary caries was caused by the incomplete removal of all soft, infected dentin during the preparation of the cavity. The first indications that secondary caries may have other causes came from research studies which investigated leakage around the margins of restorations. According to Kidd, there is little evidence that leaving infected dentin behind after cavity preparation would result in caries progression.² A review by Ricketts confirmed that the microflora left beneath restorations usually do not grow, although they may survive for several months. Their viability is determined by the degree to which nutrients are excluded by an effective restorative seal.³