Purpose: This study investigates one production method from several production methods of the CEREC3 system which does not require model production and that can be used without antagonistic relationship and check bite and can provide one-day treatment.
Methods: The ceramic inlay was produced using the IPS Empress CAD block of Ivolar Vivadent, which is a glass ceramic block, by applying the information obtained from the optical impression prior to preparation for the maxillary right second premolar and maxillary right first premolar to the optical model constructed after preparation. The optical model was not trimmed in the case of the maxillary right second premolar while parts other than the working tooth were trimmed of their optical model in the case of the maxillary right first premolar.
The thin part was reinforced after installing sprue in the maxillary right second premolar, and for the maxillary right first premolar, the thin part in the optical model was reinforced with sprue to produce the ceramic inlay.
Results: The processing time for the virtual prosthesis when producing the maxillary right first premolar without trimming of the optical model was slightly delayed. Both maxillary right second premolar and maxillary right first premolar were suitable for ideal prosthesis. The thin parts of the virtual restoration were easily identified through different colors and modification was simple as the thickness was described in numeric values. It took approximately 1 hour from obtaining the optical impression to oral settlement, and production of a temporal restoration was unnecessary due to the short production time.
Conclusion: The CEREC3 system enabled quick production of prosthesis due to the provision of an optical impression which enabled omission of impression sampling and model production, and also precise production due to lack of contraction and expansion of materials. In this study, the slight delay in processing time for virtual prosthesis is estimated to have resulted from the size of the optical model in the software, and both prostheses exhibited suitability for ideal prosthesis. Also, treatment was possible through one-time visits which lessened the burden of patients from having to make multiple visits to the dental clinic. Meanwhile, the patients exhibited a high level of satisfaction due to the excellent aesthetics of the ceramic material. However, precision can differ in CEREC3 based on the skills of the operator. Formation of a precise cavity of the abutment tooth, manufacturer°Øs manual, space given for cement by the program, precise use of the contrast spray containing titanium dioxide, and accurate sampling of the optical impression are considered to be important factors.
Ⅲ. CEREC3를 이용한 Ceramic Inlay 임상 case