Influence of Different Luting Systems on Microleakage of CAD/CAM Composite Crowns: A Pilot Study.

<bold>Purpose: </bold>To investigate whether (1) the curing mode and (2) the use of the corresponding or noncorresponding crown luting system have an impact on the microleakage of computer-aided design/computer-assisted manufacture (CAD/CAM) composite crowns after chewing simulation.<bold>Materials and Methods: </bold>Two CAD/CAM composite blocks (Lava Ultimate [n = 20] and LuxaCam Composite [n = 20]) and their luting systems and curing modes (light curing [LC] or chemical curing [CC]) were investigated. A dye penetration test was used to detect the presence of microleakage.<bold>Results: </bold>Independently of the luting system, the LC groups showed a significantly lower microleakage compared to the CC groups (P < .05). Furthermore, the CC groups exhibited a reduction of microleakage if the CAD/CAM block and luting system were from the same manufacturer.<bold>Conclusion: </bold>For the CC mode, the corresponding block and luting system should be used. [ABSTRACT FROM AUTHOR]