Silorane Based Resin Composite Versus Nanohybrid Resin Composite: Effect of pH of Storage Media on Volumetric Changes and Adaptability at Tooth/Restoration Interface | ||||
| Egyptian Dental Journal | ||||
| Article 11, Volume 64, Issue 2 - April (Fixed Prosthodontics, Dental Materials, Conservative Dentistry & Endodontics), April 2018, Page 1487-1498 PDF (1.33 MB) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/edj.2018.77464 | ||||
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| Authors | ||||
| Rehab MA Hamed1; Mohamed A Ezzat2; Inas A Elghandour3 | ||||
| 1Researcher, Faculty of Dentistry, Cairo University, Egypt | ||||
| 2Professor of Operative Dentistry, Faculty of Dentistry, Cairo University, Egypt | ||||
| 3Associate Professor of Operative Dentistry, Faculty of Dentistry, Cairo University, Egypt | ||||
| Abstract | ||||
| This study compared dimensional stability and adaptability of two resin composites [Filtek P90 and Filtek Supreme XT] after storage in different pH media. Methods: For dimensional stability, cylindrical specimens were prepared either from Filtek P90 or Filtek Supreme XT. Specimens’ dimensions were measured before and after storage in neutral [pH7] or acidic saliva [pH 3.6] for 1 week, 1month or 3 months. Volumetric changes were calculated. For adaptability, 80 class V cavities were made in sound human teeth. The cavities were restored with Filtek P90 or Filtek supreme XT. The adaptation was evaluated using stereomicroscope; before and after storage in acidic or neutral saliva for 1 week,1 or 3 months. Results: Filtek P90 showed significantly higher contraction compared to Filtek Supreme XT only after 3 months storage. After 1 week or 1 month, the difference in volumetric changes between two material was statistically non-significant. The pH of storage media showed non-significant effect on volumetric changes of both composites. For adaptability to cavity walls in acidic saliva, no statistically significant difference was found between gap dimensions at tooth restoration interface for both Filtek P90 and Filtek Supreme XT. However, in neutral saliva, Filtek P90 showed statistically significantly higher mean gap dimensions than Filtek Supreme XT through all time storage. Conclusions: Silorane-based resin composite undergoes volumetric changes comparable to nanohybrid resin composite except on long term storage where it revealed contraction. The adaptation of silorane based composite was worse compared to that of nanohybrid composite in neutral pH media. | ||||
| Keywords | ||||
| silorane based resin composite; volumetric changes; adaptation | ||||
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