Marginal Fit Evaluation Trough Micro-CT Technology of Pressed vs Milled Ceramic Inlays

Abstract

The goal of the present study is to compare the marginal fit using microCT of ceramic inlays obtained using two different technologies: pressing technique (lithium disilicate) and milling technique (milled leucite glass-ceramic). After extraction of four caries-free mandibular first molars, first class inlay cavities were prepared. For each tooth two inlays were manufactured- one by using pressed lithium disilicate (Emax) (n=4) and one by using milled leucite glass-ceramic (n=4). The marginal gap was analyzed circumferentially at the occlusal margin using a table-top Bruker micro CT, by measuring the distance at the occlusal limit of the cavities, between the restoration and the tooth in several points for every surface of each tooth before cementing. Data were analyzed statistically using One �way ANOVA with Tukey�s Multiple Comparison Test performed using 5.00 for Windows (GraphPad Prism 5.00 Software, San Diego, California USA). When the marginal gaps of the inlays made out of different materials on the same tooth were compared, only one result had no statistical significance. The program expressed also results by comparing the gaps of pressed vs milled restorations on different teeth. 11 out of 16 results had statistical significance. Although statistical significance between the two studied materials, we can conclude that both used materials offer a good marginal adaptation within the acceptable limits. By summing up the gathered data we can conclude that the milled ceramic shows a better marginal fit than the pressed ceramic.

Clinical-statistical Study on the Biomimetic Adhesion of Whole Ceramic Inlays

“…The success of ceramic restorations depends on several factors: a correctly prepared cavity, a precise impression, a thorough laboratory technique, and an impeccable cementing technique [9][10][11].…”

Experimental Study on the Improvement of the Use of Diacrylic Composite Resins in Restorative Dentistry by Compensatory Techiniques

“…Of utmost importance are the quality of the polymerization process and the bonding contraction, two elements which are still unresolved issues in the treatment of dental injuries with the DRC. In this context, the main objective of the present research is the evaluation of marginal microinfiltrations in composite resin restorations, depending on the different restoration techniques [14][15][16][17] for 2nd class cavities. The optimal method of restoration and the techniques that can be learned and applied by practitioners in order to optimize the clinical behavior of the photopolymerizable composite diacrylic resins used in direct restorations will be highlighted.…”