Jorna, J. (Joseph) (2017) 5-jaars resultaten van Lava™ Zirkoniumoxide kronen versus Lava™ Digital Veneering System (DVS) kronen: overleving en succes aan de hand van klinische en röntgenologische beoordelingen. thesis, Dentistry.
Full text available on request.Abstract
Introduction: The manufacturing of indirect restorations occurs more often by means of computer-aided design and computer-aided manufacturing (CAD/CAM). This development creates a new field of possibilities. The focus of this study lies on comparing the differences in survival and success between CAD/CAM manufactured porcelain veneered Lava™ Zirconia crowns (Lava™ Zirconia) and Lava™ Digital Veneering System crowns (Lava™ DVS). The aim of this study is to define which type of crown should be preferred by the dental professional. Materials and Methods: This is a randomized prospective clinical cohort study. 33 crowns (21 Lava™ Zirconia crowns and 12 Lava™ Digital Veneering System crowns) were included and analyzed. These crowns were placed between 2011-2012. All treatments were conducted at the dental department of the University of Groningen. The crowns were evaluated after 5 years of functioning. The success rate was measured using the standardized FDI World Dental Federation: clinical criteria for the evaluation of direct and indirect restorations. Evaluation took place using 16 aspects that were scored by an ordinal 1 to 5-point scale. Survival was defined as being in-situ the moment of evaluation. IBM SPSS was used to conduct a Mann-Whitney U test to compare the obtained data of both groups. The Fishers exact test is used to show if there is any difference in the amount of unacceptable domain scores per type of crown. Results: All crowns remained in situ at the time of evaluation (100% survival rate). Lava™ DVS crowns show a significantly better marginal adaptation (p=0.040) compared to Lava™ Zirconia crowns. After 5 years of functioning, the unacceptable domainscores of the Lava™ DVS crowns and Lava™ Zirconia crowns do not differ significantly. Conclusion: Both crowns show a high rate of success but the marginal adaptation was significantly (p=0.040) better for Lava ™ DVS crowns. The 5-year evaluation shows a 100% survival rate for both materials. One can conclude that the Lava™ DVS crown is an excellent choice based on the studied parameters and the better marginal adaptation.
| Item Type: | Thesis (UNSPECIFIED) |
|---|---|
| Supervisor name: | Schepke, dr. U. and Cune, dr. M.S. |
| Faculty: | Medical Sciences |
| Date Deposited: | 18 Nov 2021 11:09 |
| Last Modified: | 22 Nov 2021 11:22 |
| URI: | https://umcg.studenttheses.ub.rug.nl/id/eprint/2799 |
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