3D Printed Cast Is more Accurate than Conventional Stone Cast for Single Tooth Supported Fixed Prosthesis

Objective: Studying the clinical adaptation of the crown in relation to the finished line of the prepared abutment and assessing the fit and precision of single unit fixed dental prosthesis made on digitally printed positive replica casts that created by printers depending on digital intra oral scanning by using filament material of resin material were the goals of this in vitro investigation. Materials and Methods: After acquiring digital virtual casts through intraoral scanning of the prepared teeth using a 3Shape trios 4 intraoral scanners, ten digitally printed positive replica casts were created using a3D printers depending on digital intra oral scanning. The master model was created from filament material of resin material. Ten Conventional type 3Stone were used to from conventional stone cast (CS), final impression was made from dual viscosity impressions material. Every fixed dental prosthesis (FDP) was made using a Dentium 5-axis milling machine. A two-way ANOVA was conducted to characterize the whether the deference between groups was significant or not, 3D analysis software was used to superimpose the milled FDPs' intaglio surface and master model. Also post hoc analysis, and Tukey honestly significant difference test was employed. Results: The internal and marginal root mean square (RMS) values of the two groups (three dimensional printed and conventional stone cast) were significantly differed, according to a two-way ANOVA.