EFFICACY OF INTRACORONAL BLEACHING USING NON THERMAL ATMOSPHERIC PRESSURE PLASMA AND ITS EFFECT ON PULP CHAMBER DENTIN. AN INVITRO STUDY | ||||
| Egyptian Dental Journal | ||||
| Article 33, Volume 62, Issue 1 - January (Part 1), January 2016, Page 285-294 PDF (665.15 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/edj.2016.92673 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
| Heba Abdel Hamid1; Gihan Aly Abdel Rahman2; Taheya Ahmed Moussa2; Farouk Fahmy Elakshar3 | ||||
| 1MSc. in Dental Materials Science, Faculty of Oral and Dental Medicine, Cairo University. | ||||
| 2Professor of Dental Materials Science, Faculty of Oral and Dental Medicine, Cairo University | ||||
| 3Professor of Physics, Faculty of science, Al-Azhar University | ||||
| Abstract | ||||
| Aim: The aim of this study was to evaluate the efficacy of intracoronal bleaching using non thermal atmospheric pressure plasma and its effect on pulp chamber dentin structure. Materials and methods: Two types of commercially available hydrogen peroxide bleaching systems were used in this study with a concentration of 32% (White smile GmbH). Thirty eight single rooted premolars were collected. The teeth were sectioned in half longitudinally in a mesio-distal direction and specimens were prepared according to the testing method used. Specimens were stained with a prepared standardized coffee solution. The sectioned teeth were divided into four groups according to the type of bleaching protocol used. Color measurements were done by a spectrophotometer before bleaching, one day and one week after bleaching for all the experimental groups. Universal Testing Machine with cross head speed of 1 mm/min was used for measuring microshear bond strength of the four investigated groups before and after bleaching. Data were analyzed statistically by: Duncan Multiple range test for means comparison and Paired t test for evaluating the effect of time and intervals on different parameters within each bleaching protocol. The significance level was set at P ≤ 0.05. Results: The results showed different findings among the bleached groups when evaluated after 1 day and 7 days. It was found that non thermal atmospheric plasma has a stronger bleaching effect than LED light when used as an activating method. Furthermore, the light bleached group showed a significant decrease in the microshear bond strength values after bleaching. While, there was no statistically significant difference in microshear bond strength values of the other three groups. Conclusion: The application of non thermal atmospheric pressure plasma is a promising method for intracoronal bleaching. | ||||
| Keywords | ||||
| Intracoronal bleaching; non-thermal atmospheric pressure plasma; hydrogen peroxide | ||||
|
Statistics Article View: 108 PDF Download: 217 |
||||
