Comparison of dimensional accuracy of conventionally and digitally manufactured intracoronal restorations

The Journal of Prosthetic DentistryAvailable online 2 June 2017AbstractStatement of problemAdvances have been made in digital dentistry for the fabrication of dental prostheses, but evidence regarding the efficacy of digital techniques for the fabrication of intracoronal restorations is lacking.PurposeThe purpose of this in vitro study was to compare the dimensional accuracy of intracoronal restorations fabricated with digital and conventional techniques.Material and methodsA sound mandibular molar tooth received a standard onlay preparation, and onlays were fabricated with 1 of 3 fabrication techniques. In group CC, the onlays were made after conventional impression and conventional fabrication of a resin pattern. In group CP, the onlays were made after conventional impression and 3-dimensional (3D) printing of the pattern. In group IP, the onlays were made after intraoral scanning, and 3D printing produced the resin pattern. Ten specimens in each group (N=30) were evaluated. Glass-ceramic restorations were fabricated using the press technique. The replica technique was used to assess the marginal fit. Each replica was assessed at 8 points. One-way ANOVA was used to compare the marginal discrepancy among the 3 groups. The Tukey honest significant differences test was applied for pairwise comparisons of the groups ( α=.05).ResultsNo significant differences were noted in the marginal discrepancy at the gingival margin among the 3 groups (P=.342), but significant differen...

Source: Dental Technology Blog - June 20, 2017 Category: Dentistry Source Type: news