Aldunein, S. (Sinan) (2014) Temperatuurstijging in de pulpa bij het vervaardigen van een indirecte restauratie I: Prepareren. thesis, Dentistry.
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Abstract
The making of an indirect restoration is made up of a number of steps. It is conceivable that temperature changes in the pulp occurs during all of these stages in which the critical temperature of 42 °C might be exceeded. An initial research at the CTM has shown that there is a large variation in the waterflow output of the red handpieces. So this study evaluated the temperature changes in the pulp during tooth preparation for an indirect restoration with different level of waterflow. This is done by using of two hypotheses: 1. A higher temperature rise occurs during preparation with a low level of waterflow compared to a high level of waterflow. 2. The critical limit in which a temperature rise occurs will not exceed 5,5 °C. Thermocouples were placed in the pulp chamber of 30 extracted molars. The 30 objects have been randomly divided into three groups. The three groups will be prepared with different level of waterflow, group 1: 65-70 ml/min ‘max.water’, group 2: 35-40 ml/min ‘gem.water’, group 3: 15-20 ml/min ‘min.water’. The maximum temperature change which occurs during preparation is considered as outcome value. The results were analyzed by applying the Shapiro-Wilk test, One way Anova and LSD Tukey post-hoc. Results of the analysis has shown that the critical limit of 5,5 °C in the pulp chamber has been exceeded. In 34% of the cases the temperature exceeds the limit of 5,5 °C in ‘max.water’ and in 46% of the cases in ‘gem.water’. Furthermore, this study shows a significantly increase of temperature during a high level of waterflow compared to a low level of waterflow at preparation. As a result, the two hypotheses can be rejected.
| Item Type: | Thesis (Thesis) |
|---|---|
| Supervisor name: | Cune, Prof. Dr. M.S. and Bakker, Drs. S.J. |
| Faculty: | Medical Sciences |
| Date Deposited: | 25 Jun 2020 10:56 |
| Last Modified: | 25 Jun 2020 10:56 |
| URI: | https://umcg.studenttheses.ub.rug.nl/id/eprint/1659 |
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