Comparison of marginal adaptation of fixed ceramic restorations prepared with the ceramic heat-pressed technique and CAD/CAM technology – review of literature
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Katedra Protetyki Stomatologicznej, Warszawski Uniwersytet Medyczny Department of Prosthodontics, Medical University of Warsaw
Publication date: 2018-12-05
Prosthodontics 2018;68(4):394-405
Constant advances in laboratory technology, along with the development of dental materials, have created new opportunities for prosthetic reconstruction of clinical crowns of teeth. The most important factor affecting the possibility of the long-term functioning of a permanent prosthetic restoration in the oral cavity is the precision of its production, including the accuracy of adhesion of the restoration to the abutment. The aim of the study is to review the latest research results concerning the impact of the technology of ceramic restoration production on the accuracy of their adhesion to the structure of the abutment. Among the articles available in the Medline database, those from the years 2011-2018 were selected for the analysis. All chosen articles present a description of in vitro studies and concern the comparison of marginal adaptation depending on the type and method of preparation of the ceramic material. Despite the widespread use of digital technologies, and the continuous development of laboratory materials and procedures, the analysed studies have not been conclusive as to whether they allow obtaining a restoration with a higher marginal integrity. The results of the three studies presented here show a better marginal adhesion of restorations made in the CAD/CAM system to the abutment tooth. Two studies did not demonstrate a statistically significant difference in the marginal integrity of restorations made in the CAD/CAM system and in pressed ceramics. Different results were obtained by Azar et al., who presented statistically significant differences of marginal seal of crowns made in the CAD/CAM system in comparison to those made of heat-pressed ceramics, in favour of the traditional method of using the impression.
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