Ashwini Sukanya, GU (2018) Comparative evaluation of the microgap at the implant-abutment interface with premachined and customized laser-sintered cobalt-chromium abutments: An In Vitro study. Masters thesis, Ragas Dental College and Hospital, Chennai.
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Abstract
PURPOSE: The purpose of this study was to comparatively evaluate the microgap at the implant-abutment interface with premachined and customized laser-sintered Co-Cr abutments. MATERIALS AND METHODS: Ten Ti premachined abutments (Group I) and ten Ti customized laser-sintered Co-Cr abutments (Group II) were connected to the Ti implants and then embedded in clear autopolymerising acrylic resin blocks. These blocks were vertically sectioned using a water jet powered sectioning equipment. Scanning electron microscopic images of all the samples were obtained. Using pixel counting software, the microgaps at the implantabutment interface at the platform level (A, B, C) and internal connection level (D, E, F) were measured on both right and the left sides for each sample of both test groups. The data were subjected to statistical analysis using non parametric Mann- Whitney U test. RESULTS: The mean microgap at the implant-abutment interface at point (IA): 0.774μm for Group I and (IIA): 1.888 μm for Group II samples. The mean microgap at the implant-abutment interface at point (IB): 0.967μm for Group I and (IIB): 1.915 μm for group II samples. The mean microgap at the implantabutment interface at point (IC): 2.078μm for Group I and (IIC): 2.643 μm for Group II samples. The mean microgap at the implant-abutment interface at point (ID): 2.313μm for Group I and (IID): 6.049 μm for Group II samples. The mean microgap at the implant-abutment interface at point (IE): 1.927μm for Group I and (IIE): 6.110μm for Group II samples. The mean microgap at the implant-abutment interface at point (IF): 2.189μm for Group I and (IIF): 6.014μm for Group II samples. Non parametric Mann-Whitney U test showed statistically significant difference (p < 0.05) between two groups except at point C (p > 0.05) CONCLUSION: Within the limitation of the study, the mean microgap at the implant-abutment interface at the platform and internal connection level for premachined abutments were significantly lesser compared to that of the customized laser-sintered Co-Cr abutments, even though, the microgaps of both the test groups were within the clinically acceptable range.
| Item Type: | Thesis (Masters) |
|---|---|
| Uncontrolled Keywords: | Implant-abutment interface ; Customized laser-sintered Co-Cr abutment ; microgap ; misfit ; Scanning electron microscope (SEM). |
| Subjects: | DENTAL > Prosthodontics and Crown and Bridge |
| Depositing User: | Subramani R |
| Date Deposited: | 28 Oct 2018 17:11 |
| Last Modified: | 28 Oct 2018 18:05 |
| URI: | http://repository-tnmgrmu.ac.in/id/eprint/10005 |
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