Biomedical subjects
Publications and source records attributed to K Zyskind.
Subgingivally fractured incisors are still a challenge to treat. A case report is used as a basis for reviewing the different treatment options, which involve either extraction or preservation of the root. A multidisciplinary approach, using orthodontic forced eruption, is presented in detail.
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General studies have suggested that clinical gingivitis might be associated with radiographically detectalble deficiencies around the margins of stainless steel crowns, or with cement remaining in the gingival sulcus, or with a combination of these. The case of a nine-year-old girl reported here is an example of the high toleration potential of young periodontal tissues--even when a significant amount of zinc phosphate cement had been pushed into the lingual sulcus during cementation.
PURPOSE: The aim of the present study was to assess the microleakage of pit and fissure sealants in: 1) air-abraded molars with and without etching and 2) in preventive resin restorations (PRR) prepared with air abrasion or mechanically with a bur. METHODS: Forty molars with no or minimal occlusal caries were cleaned with pumice, washed, and assigned to four groups of 10 teeth each. In group A, the teeth were air-abraded and Helioseal was applied directly to the fissures without previous treatment. Group B was air-abraded and etched for 20 s prior to sealant application. In group C, caries was excavated with air abrasion, etched, and restored with Scotchbond Multipurpose, Z-100 and Helioseal. Group D was similar to C except that the fissures were prepared mechanically with a carbide bur at high speed. RESULTS: Group A was significantly different in both Y1 and Y2 measurements from all the other groups. No differences were observed between all the other groups. Acid etching should be a precondition before sealant application. Air abrasion and mechanical preparation resulted in the same amount of microleakage following acid etch.