Efficacy of a porcelain refinishing system in restoring surface finish after grinding with fine and extra-fine diamond burs.

Commercial porcelain refinishing kits are claimed to restore the surface finish on porcelain after adjustments in circumstances that preclude reglazing. This study investigates the efficacy of one such kit in restoring a Vitadur N porcelain surface finish after grinding with fine (30 microns grit-red band) and extra-fine (15 microns grit-yellow band) high-speed diamond burs. The production of the porcelain test samples, the refinishing procedures, and the refinishing times were standardized throughout.

Localised palatal tooth surface loss and its treatment with porcelain laminates.

Localised tooth surface loss and subsequent caries in a young patient due to an unusual dietary habit is reported. The treatment and management of such conditions is discussed. Tooth surface loss is a condition seen with increasing frequency, often associated with the retention of the natural dentition into older age.

Refinishing of porcelain by using a refinishing kit.

Dental porcelain occasionally requires adjustment in circumstances that preclude reglazing. Porcelain refinishing kits are now available commercially. The effects of using one such kit on Vita VMK bonded porcelain was investigated qualitatively and quantitatively using scanning electron microscopic and surface profilometric techniques, respectively.

Apical penetration by a root canal irrigant: a case report.

A case is reported in which apical penetration by a root canal irritant occurred. The clinical manifestations are described and the case management discussed.

In vitro temperature rises during visible-light curing of a lining material and a posterior composite.

The aim of this study was to measure the rise in temperature during: (i) a single cycle of a curing light unit, (ii) the polymerization of a layer of light-cured lining material, and (iii) the polymerization of a light-cured posterior composite material, and also during combinations of these individual procedures. Experimental work was undertaken in vitro and measurements were made using a thermocouple placed centrally in an insulated PTFE well. Large temperature rises occurred with the use of the curing light alone.