Clinical and basic research of CAD / CAM indirect resin composite crown：Establishment of Japanese original metal-free treatment

Abstract

CAD/CAM indirect resin composite crowns have been steadily spreading in the eight years since they were introduced to the National Health Insurance in 2014. In order to improve the quality of this novel crown, Japan has been promoting “practice-industry-government-academia-patient”. As a result of clinical research, the 4-year survival rate of the premolar CAD/CAM indirect resin composite crown was 96.4％，and the success rate (a detachment was regarded as a problem) was 77.4％. Accumulation of basic data has progressed, and the effectiveness of resin primers for matrix resins to be adhered has been clarified. In this way, the clinical and basic aspects of the CAD/CAM indirect resin composite crowns demonstrate the potential as a further resin composite material. We cannot help but strongly expect the Japanese Society for Dental Materials and Devices to establish “the Japanese original metal-free treatment” in the near future.