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Effect of Fabrication Method on Fracture Strength of Provisional Implant-Supported Fixed Dental Prostheses
- Source :
- Prosthesis, Vol 2, Iss 4, Pp 325-332 (2020)
- Publication Year :
- 2020
- Publisher :
- MDPI AG, 2020.
-
Abstract
- There has been an increase in utilizing 3D printers in dental restorations. The purpose of the study is to compare mechanical properties of 3D-printed prostheses to those of self-cured and/or computer-aided design-computer-aided manufacturing (CAD-CAM) restorations. A metal master typodont was prepared for the mandibular left sextant with implant analogs embedded at the first premolar and first molar positions with a missing second premolar. Three-unit provisional fixed dental prosthesis (FDP) was designed utilizing the 3Shape tooth library and forty-five uniform specimens were fabricated with different materials: self-cured poly(methyl methacrylate) (PMMA) (N = 15), milled PMMA CAD-CAM blocks (N = 15) and 3D-printed resin (N = 15). All specimens were tested using an Instron machine at a crosshead speed of 0.5 mm/min by an axial load on the occlusal surface of the second premolar pontic site. Statistical analysis was completed with Shapiro-Wilk, ANOVA and Tukey post-hoc tests. Mean fracture force was 300.61 N, 294.64 N and 408.49 N for self-cured PMMA, milled PMMA and 3D-printed resin, respectively. Mean force at FDP fracture of 3D-printed resin was significantly greater than the mean fracture force of either self-cured (p = 0.016, 95% CI [17.86, 197.91]) or milled (p = 0.010, 95% CI [23.83, 203.88]) PMMA.
- Subjects :
- fracture strength
3D-printed resin
provisional restorations
Medicine
Subjects
Details
- Language :
- English
- ISSN :
- 26731592
- Volume :
- 2
- Issue :
- 4
- Database :
- Directory of Open Access Journals
- Journal :
- Prosthesis
- Publication Type :
- Academic Journal
- Accession number :
- edsdoj.4622527ed45c4f319005cbfa12cdfe33
- Document Type :
- article
- Full Text :
- https://doi.org/10.3390/prosthesis2040030