Flexural resistance of CAD/CAM blocks. Part 3: polymer-based restorative materials for permanent restorations
Research output: Contribution to journal › Article
Methods: Seven types of polymer-based blocks were tested: Lava Ultimate, 3M; Brilliant Crios, Coltene; Cerasmart, GC; Block HC, Shofu; Katana Avencia, Noritake; Grandio Blocs, Voco; Tetric CAD, Ivoclar-Vivadent. Specimens were cut out from blocks, finished, polished, and tested in a three-point bending test apparatus until failure (n=30). Flexural strength, Weibull characteristic strength, and Weibull modulus were calculated. Flexural strength data were statistically analyzed. Anova on Ranks was applied, followed by the Dunn’s test for post hoc comparisons (p=0.05).
Results: Flexural strength values (MPa) were measured (mean±standard deviation). Different letters in brackets label statistically significant differences: Grandio Blocs 266±24(a), Brilliant Crios 259±21(ab); Tetric CAD 254±15(ab); Katana Avencia 241±29(bc); Cerasmart 221±24(cd); Lava Ultimate 196±23(de); Block HC 139±10(e). All the tested materials had flexural strengths greater than 100 MPa, thereby satisfying the requirements of ISO standards for polymer-based materials. For all the tested materials the Weibull characteristic strength was greater than 100 MPa. Weibull modulus ranged between 21.20 (Tetric CAD) and 9.09 (Katana Avencia).
Clinical significance: even though all the CAD/CAM polymer-based materials marketed in blocks tested in the present study satisfy the requirements of ISO standard for polymer-based materials, their flexural resistance differs significantly. The data presented in the study are useful to clinicians to select the most appropriate materials for each clinical case.
|Journal||American Journal of Dentistry|
|Publication status||Accepted for publication - 3 Jun 2020|
- Resin CAD Am J Dent FINAL ACCEPTED COMPLETE
Rights statement: The embargo end date of 2050 is a temporary measure until we know the publication date. Once we know the publication date the full text of this article will be able to view shortly afterwards.
Accepted author manuscript (Post-print), 316 KB, PDF document
Due to publisher’s copyright restrictions, this document is not freely available to download from this website until: 1/01/50