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UBC Theses and Dissertations

In-vivo comparison of digital and conventional inter-occlusal records Abdulateef, Saraa


Purpose: The objectives of this study were to evaluate the clinical accuracy and reproducibility of virtual inter-occlusal records of the CEREC intraoral scanning system. The presence or absence of inter-occlusal contacts on multiple virtual occlusal records will be compared with conventional polyvinyl siloxane (PVS) inter-occlusal records. Materials and Methods: Three conventional inter-occlusal records followed by three virtual inter-occlusal records per side per participants were taken. Then three sites of close proximity (SCP) and three sites of clearance (SC) per side per participant were identified on the transilluminated conventional PVS inter-occlusal records. A total of sixty SCP and SC were identified for ten participants using the conventional PVS inter-occlusal records. The presence or absence of these sites were analyzed using CloudCompare Software. Result: Sensitivity for the three-different virtual inter-occlusal records was between 82% and 87%. Specificity was higher with values between 93% and 97%. Positive predictive values for the three scans were 95%, 96%, and 93%, and the negative predictive values 84%, 86% and 88%. Only 74% of the SCP were detected consistently with all three repeated scans and 92% of the SC were identified accurately with all the three scans. Conclusion: Accuracy of CEREC Omnicam intra-oral scanner is clinically acceptable, while reproducibility is fair.

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