Wieringa, S. (Stefanie) (2017) Enabling research on ultrasonic scalers cleaning inside periodontal pockets: development of a model to realistically characterize streaming and cavitation around subgingival ultrasonic cleaning in a periodontal pocket. thesis, Dentistry.
Full text available on request.Abstract
A good oral hygiene and a good periodontal treatment to disturb or remove dental plaque and calculus, is important to recover the balance between the immune response and biofilm. A good technique to clean supra- and subgingival is ultrasonic scaling. The high frequency motion of the scaler tip in the cooling water causes streaming and cavitation around the scaler tips. To determine and study the cleaning efficacy of ultrasonic scaler tips a model of periodontal pocket was designed. Until now no model of a periodontal pocket had been developed. This was the first aim of this study. Based on what was found in the literature it was expected that small holes in an ultrasonic scaler tip could enhance the formation of cavitation and the cleaning efficacy during periodontal treatment. Modified scaler tips were made. The second aim of the study was the visualization of the fluid flow inside the pocket model placed in a plastic container. The model was placed in the container and the pocket of the model was filled with tracer particles (small hollow glass spheres). During the activation of the tips a video was made. The third aim of this study was the visualization of the cavitation around modified and unmodified scaler tips with the use of sonoluminescence. First the modified and unmodified scaler tips were tested placed one by one a plastic container and after that inside the model, that was also placed in a plastic container. Pictures were taken during the activation of the scaler tips. The photographs were processed with ImageJ and statistically analyzed. The fourth aim of this study was the visualization of the actual streaming and cavitation around modified and unmodified scaler tips with the use of high speed imaging. Modified and unmodified scaler tips were placed one by one in a plastic container. During the activation of the tips a video was made with a high-speed camera. The fifth aim of this study was to analyse the cleaning efficacy of unmodified and modified scaler tips with the use of cleaning indicatiors (GKE). These cleaning indicators were placed inside the model of a periodontal pocket. The model was placed in a plastic container and the scaler tips were placed in the pocket one by one and activated. Pictures were taken before, during and after the activation of the scaler tips. The pictures were processed with ImageJ and statistically analyzed. It is found that the modification of tips do influence the creation of streaming and cavitation. However, no statistically significant improvement has been found in terms of streaming, cavitation and cleaning efficacy when using modified tips. Further research could be done on the use of the model of a periodontal pocket and on the enhancement of cavitation and cleaning efficacy by modifying the ultrasonic scaler tips.
| Item Type: | Thesis (UNSPECIFIED) |
|---|---|
| Supervisor name: | Sluis, Dr. L.W.M. van der and Verhaagen, Dr. B. and Fernandez Rivas, Dr. D. and Versluis, Prof. dr. |
| Faculty: | Medical Sciences |
| Date Deposited: | 19 Nov 2021 14:41 |
| Last Modified: | 19 Nov 2021 14:41 |
| URI: | https://umcg.studenttheses.ub.rug.nl/id/eprint/2808 |
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