Journal article
Evaluation of the Surface Roughness and Accelerated Aging of CAD/CAM Materials
The International journal of prosthodontics, Vol.33(4), pp.418-428
07/01/2020
DOI: 10.11607/ijp.6556
PMID: 32639702
Abstract
Purpose: To compare the influence of surface roughness and accelerated aging on the mechanical properties of polymer-based and ceramic CAD/CAM materials. Materials and Methods: Three polymers (Lava Ultimate [LVU], VITA ENAMIC [ENA], and Shofu Block HC [SFB]) and one ceramic (IPS Empress CAD [EMP]) were selected for this study. The specimens were treated with the aim of measuring surface roughness (Ra [mm]) and its influence on the mechanical properties. The treatments were: polishing (POL); etching with 9.6% hydrofluoric acid for 90 seconds (ETC); airborne-particle abrasion with 50-mu m aluminum oxide at 2-bar pressure (SBT); and airborne-particle abrasion with 50-mu m aluminum oxide at 2-bar pressure plus etching with 9.6% hydrofluoric acid (SAC) for 90 seconds. Before and after the accelerated aging (AA) protocol (30,000 cycles, 5 degrees C and 55 degrees C), the specimens were subjected to the 3-point bending test. The data were analyzed with two-way and three-way ANOVA and post hoc Tukey test (P < .05). Results: The surface roughness ranged from 0.24 mu m to 1.96 mu m, with statistically significant differences (P < .05). The highest surface roughness, in descending order, was exhibited by: LVU > SFB > EMP > ENA. The AA demonstrated an influence on the flexural strength of LVU, ENA, and SFB. The surface treatment did not affect the flexural moduli of the materials tested. The LVU and SFB showed decreased moduli of resilience after the AA; however, modulus of resilience was not influenced by surface treatment. Conclusion: The polymer-based materials were affected by AA. In addition, surface treatment could jeopardize their mechanical properties in certain conditions.
Details
- Title: Subtitle
- Evaluation of the Surface Roughness and Accelerated Aging of CAD/CAM Materials
- Creators
- Thiago Soares Porto - Case Western Reserve UniversityScott Juyoung Park - Case Western Reserve UniversityAlexandre Joseph Faddoul - Case Western Reserve UniversityFady Fouad Faddoul - Case Western Reserve UniversityPaulo Francisco Cesar - Universidade de São Paulo
- Resource Type
- Journal article
- Publication Details
- The International journal of prosthodontics, Vol.33(4), pp.418-428
- DOI
- 10.11607/ijp.6556
- PMID
- 32639702
- NLM abbreviation
- Int J Prosthodont
- ISSN
- 0893-2174
- eISSN
- 1942-4426
- Publisher
- Quintessence Publishing Co Inc
- Number of pages
- 11
- Language
- English
- Date published
- 07/01/2020
- Academic Unit
- Operative Dentistry
- Record Identifier
- 9984420841602771
Metrics
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