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Objectives. The purpose of this study was to determine the minimal extent of cure required by the base of a Class 2 resin composite restoration (Z250, 3M ESPE, St Paul, MN, USA) that allows it to support the rest of the restoration and maintain its marginal seal under simulated clinical conditions. Methods. Resin composite (Z250, 3M ESPE, St Paul, MN, USA) was placed incrementally or in bulk into...
Objectives. To compare the polymerization contraction stress of resin cements in dual-cure and self-cure modes, and verify its effect on microleakage and gap formation in class I cavities restored with porcelain inlays.Methods. Dual-cure cements (Calibra, Choice and RelyX ARC) were monitored for contraction stress during 30min in the tensilometer, in the presence or absence of photo-activation. Microleakage...
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