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Surface Roughness of Two Scannable Die Materials Publisher



Almussawi RMA1, 3 ; Farid F2 ; Aljibori OM1, 3 ; Dheyaa AM4 ; Shamshiri AR5
Authors
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Authors Affiliations
  1. 1. Department of Prosthodontic, College of Dentistry, University of Kufa, Najaf, Iraq
  2. 2. Department of Prosthodontics, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
  3. 3. Department of Prosthodontic, College of Dentistry, University of Kufa, Najaf, Iraq
  4. 4. Department of Pharmacology, Al- Kafeel University College, Iraq
  5. 5. Research Center for Caries Prevention, Dentistry Research Institute, Department of Community Oral Health, School of Dentistry, Tehran University of Medical Sciences, Tehran, Iran

Source: Indian Journal of Public Health Research and Development Published:2019


Abstract

Surface roughness influences the marginal and internal adaptation of the prosthesis. It also can affect the accuracy of scanned data in CAD/CAM techniques. Purpose - present study compared surface roughness of a stone and a polyurethane die material. Methodology – An identical aluminum model in form of prepared premolar was made using CNC milling machine. Poly vinylsiloxane impressions were made from the model. Half of the impressions were poured with type IV stone and the other half with the exacto-form resin die material. Surface roughness of each die was measured by profilometer. The data were analyzed with ANOVA and Tukey’s test at 95% level of confidence (p=0.05). Results –the mean value of surface roughness for stone die material was 1.79529, and for exacto- form was.89414μm. The difference was significant. Conclusion – the surface of Exacto-form poly urethane dies is less rough in comparison with stone dies. © 2019, Indian Journal of Public Health Research and Development. All rights reserved.
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