Molinero-Mourelle, Pedro; Cascos-Sanchez, Rocio; Yilmaz, Burak; Lam, Walter Yu Hang; Pow, Edmond Ho Nang; Del Río Highsmith, Jaime; Gómez-Polo, Miguel (2021). Effect of Fabrication Technique on the Microgap of CAD/CAM Cobalt-Chrome and Zirconia Abutments on a Conical Connection Implant: An In Vitro Study. Materials, 14(9) Molecular Diversity Preservation International MDPI 10.3390/ma14092348
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The aim of this in vitro study was to investigate the microgaps at the implant-abutment interface when zirconia (Zr) and CAD/CAM or cast Co-Cr abutments were used.
METHODS
Sixty-four conical connection implants and their abutments were divided into four groups (Co-Cr (milled, laser-sintered and castable) and Zirconia (milled)). After chewing simulation (300,000 cycles, under 200 N loads at 2 Hz at a 30° angle) and thermocycling (10,000 cycles, 5 to 50 °C, dwelling time 55 s), the implant-abutment microgap was measured 14 times at each of the four anatomical aspects on each specimen by using a scanning electron microscope (SEM). Kruskal-Wallis and pair-wise comparison were used to analyze the data (α = 0.05).
RESULTS
The SEM analysis revealed smaller microgaps with Co-Cr milled abutments (0.69-8.39 μm) followed by Zr abutments (0.12-6.57 μm), Co-Cr sintered (7.31-25.7 μm) and cast Co-Cr (1.68-85.97 μm). Statistically significant differences were found between milled and cast Co-Cr, milled and laser-sintered Co-Cr, and between Zr and cast and laser-sintered Co-Cr (p < 0.05).
CONCLUSIONS
The material and the abutment fabrication technique affected the implant-abutment microgap magnitude. The Zr and the milled Co-Cr presented smaller microgaps. Although the CAD/CAM abutments presented the most favorable values, all tested groups had microgaps within a range of 10 to 150 μm.
Item Type: |
Journal Article (Original Article) |
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Division/Institute: |
04 Faculty of Medicine > School of Dental Medicine > Department of Reconstructive Dentistry and Gerodontology 04 Faculty of Medicine > School of Dental Medicine > Department of Preventive, Restorative and Pediatric Dentistry |
UniBE Contributor: |
Molinero Mourelle, Pedro, Yilmaz, Burak |
Subjects: |
600 Technology > 610 Medicine & health |
ISSN: |
1996-1944 |
Publisher: |
Molecular Diversity Preservation International MDPI |
Language: |
English |
Submitter: |
Tina Lauper |
Date Deposited: |
28 Jun 2021 11:56 |
Last Modified: |
05 Dec 2022 15:51 |
Publisher DOI: |
10.3390/ma14092348 |
PubMed ID: |
33946477 |
Uncontrolled Keywords: |
dental implant dental implant abutment connection dental implant–abutment design implant–abutment interface microgap |
BORIS DOI: |
10.48350/156847 |
URI: |
https://boris.unibe.ch/id/eprint/156847 |
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