PMID: 11314214Apr 21, 2001Paper

Barcoll hardness of dental materials treated with an APF foam

The Journal of Clinical Pediatric Dentistry
P F AbateR L Macchi

Abstract

The hardness of a dental material is generally related to its mechanical properties. The purpose of this study was to evaluate the hardness of several resins and cements exposed to an APF Foam (Minute Foam, Oral-B). Four molds 6 x 2 mm were prepared for each experimental condition with each of the following materials: Filtek P 60 (3 M); Silux Plus (3 M); Ariston pHc (Vivadent); F 2000 (3 M); Vitremer Restorative (3 M) and lonofil Molar (Voco). Immediately after prepared, the samples were stored in water or in the APF foam. To evaluate the Barcoll hardness, measurements were made on both sides of the specimens (top--T and bottom--B), immediately, and after 1 min, 24 h and 7 d. The results, expressed as percentages of the loss of hardness of each sample from the baseline readings, were analyzed with an ANOVA and Tukey's test. ANOVA revealed the significant influence of material, time and treatment. The surface analyzed (T or B) had no significance. Among the glass-ionomers tested the loss of hardness was significantly higher (+30%) than for resin-based composites (+/- 15%). Treatment with the APF foam for 7 days produced the greatest loss of hardness (42%) and at 24 h the least (less than 5%). There were no other significant find...Continue Reading

References

Jul 1, 1992·Journal of Esthetic Dentistry·K KulaR Liao
Jun 1, 1986·The Journal of Prosthetic Dentistry·V J SposettiA C Levin
Jul 1, 1983·Journal of Dental Research·K KulaV Thompson
Jan 1, 1981·The Journal of Prosthetic Dentistry·A Yaffe, M Zalkind
Jan 1, 1993·Dental Materials : Official Publication of the Academy of Dental Materials·W A el-BadrawyR E Wood

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