Abstract
The construction of indirect composite inlays which are retained with an adhesive luting cement has been recommended as an alternative to directly placed composite resins to offset the technical and handling problems associated with these materials. It is claimed that these restorations will have acceptable, stable margins. This study investigated the marginal leakage of composite inlays cemented with either resin or glass ionomer luting materials. Twenty inlays were prepared and cemented either with Ketac-Cem or Dual cement in extracted teeth. After conditioning, the teeth were immersed in a 0·01% solution of methylene blue solution for 24 h. Following sectioning of the teeth, the site and extent of the dye penetration were assessed using an optical microscope. Results showed that less leakage occurred in the inlays cemented with glass ionomer cement when compared to the resin. With both cements, the leakage occurred at both the cement-inlay and cement-tooth interfaces. More leakage occurred at the cement-tooth interface when the resin was used.
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