CORRELATION BETWEEN ALTERED ENAMEL MINERAL CONTENT AND FINAL TOOTH SHADE | ||
| Egyptian Dental Journal | ||
| Volume 70, Issue 2 - Serial Number 5, April 2024, Pages 2065-2073 PDF (2.37 M) | ||
| Document Type: Original Article | ||
| DOI: 10.21608/edj.2024.263671.2903 | ||
| Authors | ||
| Rania ElSaady Badawy* 1; Hend Sayed Ahmed2; Ahmed Fawzy Aboelezz3 | ||
| 1Associate Professor of Dental Materials, Suez Canal University | ||
| 2Associate Professor of Conservative Dentistry, The British University in Egypt | ||
| 3Professor of Operative Dentistry, Suez Canal University. | ||
| Abstract | ||
| Objectives: This study was conducted to evaluate the correlation between alteration of enamel mineral content and tooth shade. Materials and Methods: A total of 33 sound bovine enamel blocks (5 x 5 mm, 2 mm thickness), were obtained from the middle third of the labial enamel surface. The samples were divided into three subgroups (n=11/group), where Group I received no surface treatment; Group II represents the demineralized enamel surface, Group III represents the remineralized enamel surface. Scanning Electron microscopic (SEM) examination and Elemental Analysis (EDXA) testing, as well as Color measurement using a color spectrophotometer and micro-hardness evaluation were performed for all samples. Results: The L values revealed a significantly strong negative correlation with carbon (r = -0.74, p = 0.002), but being positively correlated for oxygen (r = 0.59*, p = 0.02215), phosphate (r =0.62*, p = 0.01315) and calcium (r = 0.76, p = 0.00115). In contrast, both a and b values were only positively correlated for carbon (r = 0.67**, p = 0.006; r = 0.72**, p = 0.003 respectively), and negatively correlated for the rest of elements. Vickers microhardness values on the other hand were only negatively correlated with carbon (r = -0.88**, p = 0.000), but positively correlated for the rest elements. Conclusions: The change in the surface elemental content of the bovine enamel affected the lightness and the blue-yellow axis of tooth color, correlating respectively with the L* and b* values. | ||
| Keywords | ||
| Enamel demineralization; Microhardness; Shade | ||
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