Method: The clinical and Leinfelder Wear Test data were previously reported (IADR Abst.# 0175, March 2006). The Kerr Wear Test was also previously reported (IADR Abst. # 0424, March 2007). Wear from the Kerr Wear Test was measured (three samples of each material) and the means and s.d. reported. The clinical wear data were plotted vs. in-vitro wear in an Excel plot and the correlation coefficients calculated.
Result: The clinical and in-vitro wear data are presented in the attached table. When the clinical wear data were plotted against the Leinfelder Wear test data, a linear relationship was found with correlation coefficient R2 = 0.91. When the clinical wear data were plotted against the Kerr Wear Test data, a linear relationship was also found with correlation coefficient, R2 = 0.94.
Conclusion:
A good correlation of clinical wear was found to both the Leinfelder and Kerr In-Vitro Wear Tests (supported by Kerr Corp.).
Wear |
XRV |
XRV Enamel |
Belleglass HP |
Clinical Wear, Microns/Yr. (s.d.) |
13.0 (5.5) |
10.6 (5.1) |
3.0 (5.4) |
Leinflelder Wear, Microns/Cyc. X10-6(s.d.) |
13.3 (2.8) |
11.1 (2.9) |
2.1 (0.8) |
Kerr Wear Test |
|
|
|
Lot Number |
442745 |
2696 |
445602 |
Wear, cc/cycle X 10-9 (s.d.) |
4.4 (0.8) |
2.9 (0.8) |
1.0 (0.6) |
Keywords: Clinical trials, Enamel, Leinfelder, Surfaces and Wear