Bos, J. ten (Jasper) (2018) Mechanische reiniging van het implantaatoppervlak met een zandstraler: de invloed van de morfologie van het botdefect en van herhaald reinigingen. Een in vitro studie. thesis, Dentistry.
Full text available on request.Abstract
Introduction: To assess the potential of an air abrasive device to clean an in vitro biofilm of an implant, using bone defect simulating models. The secondary goal of this paper is to assess the effect of repeated cleaning by an air abrasive device. Leading to the following enquiries: 1. What is the effect of the angulation of the bony defect surrounding an implant on the cleaning potential of an air abrasive device? 2. What is the effect of repeated implant debridement with an air abrasive device on the potential of an air abrasive device to remove a biofilm of an implant? Materials and methods: 19 dental implants (3,3 mm and 4,8 mm BL SLActive, Straumann, Bazel, Switzerland) where coated with a biofilm (Streptococcus oralis). They were placed in a model simulating bony defects caused by peri-implantitis. The models incorporated angles of 30°, 60° and 90°. The implants were treated for 5 sec. with an air abrasive device using glycine powder. Beside these 3 groups (30°, 60° and 90°), there was a control group which wasn’t treated with the air abrasive device. After the ‘’treatment’’ the implants were taken out of the models and the residual bacterial load was determined. This experiment was repeated 4 times. The results were tested for statistical differences using two-way and one-way ANOVA. Results: The two-way ANOVA showed an interaction effect between the type of bone defect and the repetitions of the experiment. A simple effectanalysis revealed this interaction was caused by the measurements of the 2nd and 5th repetitions of the experiment. In both cases the control group differs significantly (p≤0,006) from the other groups (90°, 60° and 30°). The main effects (type of bone defect and the repetitions of the experiment) were analysed independently by a one-way ANOVA. This test showed the highest mean CFU/mm2 was found in the control group (299,5). The mean results for the other groups where: 60° (68,8), 90° (34,4) and 30° (27,5). The only statistical difference was between the control group and the other groups. Also, the highest mean CFU/mm2 was found after repeating the experiment for the 5th time (53,8). Then follows the 2nd time (50,6), 3rd time (46,8), 1st time (36,4) and the 4th time (26,0). No statistical differences were found for the number of repetitions. Conclusion: No matter the angle of the bony defect or the number of repetitions, all of the implants had a bacterial load (CFU/mm2) after using the air abrasive device. No statistical difference was found of the mean CFU/mm2 regarding the angle of the bone defect independent of the repetitions nor the number of repetitions independent of the bone defect.
| Item Type: | Thesis (UNSPECIFIED) |
|---|---|
| Supervisor name: | Hoogmoed, dr. C.G. van and Tjakkes, dr. G.H.E. |
| Faculty: | Medical Sciences |
| Date Deposited: | 23 Nov 2021 12:36 |
| Last Modified: | 23 Nov 2021 12:36 |
| URI: | https://umcg.studenttheses.ub.rug.nl/id/eprint/2825 |
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