الفهرس | Only 14 pages are availabe for public view |
Abstract This study aimed the examination of demineralized tooth surface for the number and depth of pores after application of remineralizing agents by Atomic Force Microscope. The current study was conducted on 24 visually sound human central incisors extracted for periodontal reason; teeth were washed, stored in a phosphate buffered saline solution. The palatal surfaces were flattened; the area to be scanned was standardized on the labial surface of the samples to be the same scanned area during the whole study (20 x 20 microns). The teeth were then examined by AFM at the predetermined area; the tooth which showed any defects was excluded from the study. The obtained data and images were recorded. Specimens were then divided into two groups, group I: where phosphoric acid was used as a demineralizing agent and CPP-ACPF was used as a remineralizing agent and group II: where phosphoric acid was also used as a demineralizing agent but APF gel was used as a remineralizing agent. Specimens were imaged after demineralization at the predetermined area, the obtained data and images were recorded, and Specimens were imaged at the same predetermined area after remineralization. Results were analyzed and represented with tables and graphs where it showed that CPP-ACPF produced greater reduction for the average roughness than APF gel but the difference is not significant. 109 Also, the result showed that CPP-ACPF produced greater reduction of the number and depth of wide erosion cavities and narrow porosities than APF gel and the difference is significant. |