Deknatel, P. (2021) De invloed van Immediate Dentin Sealing (IDS) op de precisie van digitale afdrukken bij endokroon preparaties. thesis, Dentistry.
Full text available on request.Abstract
Background: Immediate Dentin Sealing (IDS) is a procedure used in restorative dentistry to obtain greater adhesion between an indirect restoration and dentin. The preparation can be captured digitally with an intra-oral 3D scanner (IOS). The scanning surface becomes more translucent by applying IDS, which may negatively affect the precision of the scan. The aim of the present study was to determine which one of the IDS procedures would result in the most precise digital impression of an endocrown preparation for three digital impression methods. Also, the effect of application of an impression powder on the precision of the IOS was investigated. Question: What is the effect of different types of IDS (no / adhesive / adhesive + flowable composite) in endocrown preparations on the precision of the digital impression method? Material and methods: The design of the study was an experimental in-vitro study. Ten samples with an endocrown preparation were divided into two adhesive groups (n=5): IDS with an 1) unfilled adhesive or 2) a filled adhesive. Three digital impression methods were investigated: two IOSs (Trios and Omnicam) and one laboratory scanner (InEos). Within the adhesive group, the samples were scanned five times per digital impression method without IDS, with adhesive and with adhesive and flowable composite. (n=5 scans per digital impression method; n=75 scans in total per sample). Per adhesive group (unfilled / filled), these procedures were repeated five times on different samples (n=375 scans in total per adhesive group). The scans within the same group were compared with one another in an engineering software. The difference between scans within one group was calculated using the mean measurement error (MME) to determine the precision per digital impression method. Afterwards, the effect of each type of IDS on the precision of the scan, as well as the influence of the impression method on the precision, were analyzed independently by means of a repeated measures ANOVA. In addition, the effects of each adhesive type were analyzed by the means of a twoway ANOVA. Results: A total of 750 scans were made, which were divided into 150 group of scans. Within the unfilled adhesive group, there was no effect of the type of IDS layer on the precision of the IOS (F (1.35, 18.90) = 3.40 ; p = .07) . Within the filled adhesive group, a significant effect was found (F (1.52, 30.38) = 4.80 ; p = .02). The biggest difference was found between the group without IDS (1.82 μm ± 1.18 μm) and the group with adhesive and flowable composite (1.23 μm ± .51 μm; p = .07). The flowable composite group showed the highest precision. Within the unfilled adhesive group (Omnicam: p = 3.61; Trios: p = 1.00) as well as in the filled adhesive group (Omnicam: p = .06; Trios: p = .18) no significant effect was found of powdering the scanning surface on the precision of the IOS. Finally, no significant effect was found between the precision of the scans with unfilled adhesive and filled adhesive (F (1; 20) = .27; p = .61). Conclusion: Applying IDS, with or without flowable composite, on an endocrown preparation did not affect the precision of the digital impression methods.
| Item Type: | Thesis (UNSPECIFIED) |
|---|---|
| Supervisor name: | de Kuijper, M.C.F.M. Msc |
| Faculty: | Medical Sciences |
| Date Deposited: | 23 May 2023 11:22 |
| Last Modified: | 23 May 2023 11:22 |
| URI: | https://umcg.studenttheses.ub.rug.nl/id/eprint/3532 |
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