Effect of Fabrication Technique on the Microgap of CAD/CAM Cobalt–Chrome and Zirconia Abutments on a Conical Connection Implant: An In Vitro Study
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 cas...
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| Online Access: | https://www.mdpi.com/1996-1944/14/9/2348 |
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| author | Pedro Molinero-Mourelle Rocio Cascos-Sanchez Burak Yilmaz Walter Yu Hang Lam Edmond Ho Nang Pow Jaime Del Río Highsmith Miguel Gómez-Polo |
| author_facet | Pedro Molinero-Mourelle Rocio Cascos-Sanchez Burak Yilmaz Walter Yu Hang Lam Edmond Ho Nang Pow Jaime Del Río Highsmith Miguel Gómez-Polo |
| author_sort | Pedro Molinero-Mourelle |
| collection | DOAJ |
| description | 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 (<i>p</i> < 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. |
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| spelling | doaj.art-5a4a7c64cb2b44fab913a0f8934a98d82023-11-21T18:00:10ZengMDPI AGMaterials1996-19442021-04-01149234810.3390/ma14092348Effect of Fabrication Technique on the Microgap of CAD/CAM Cobalt–Chrome and Zirconia Abutments on a Conical Connection Implant: An In Vitro StudyPedro Molinero-Mourelle0Rocio Cascos-Sanchez1Burak Yilmaz2Walter Yu Hang Lam3Edmond Ho Nang Pow4Jaime Del Río Highsmith5Miguel Gómez-Polo6Department of Conservative Dentistry and Orofacial Prosthodontics, Faculty of Dentistry, Complutense University of Madrid, 28040 Madrid, SpainDepartment of Conservative Dentistry and Orofacial Prosthodontics, Faculty of Dentistry, Complutense University of Madrid, 28040 Madrid, SpainDepartment of Reconstructive Dentistry and Gerodontology, School of Dental Medicine, University of Bern, 3007 Bern, SwitzerlandProsthodontics, Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Sai Ying Pun, Hong Kong, ChinaProsthodontics, Restorative Dental Sciences, Faculty of Dentistry, The University of Hong Kong, Sai Ying Pun, Hong Kong, ChinaDepartment of Conservative Dentistry and Orofacial Prosthodontics, Faculty of Dentistry, Complutense University of Madrid, 28040 Madrid, SpainDepartment of Conservative Dentistry and Orofacial Prosthodontics, Faculty of Dentistry, Complutense University of Madrid, 28040 Madrid, SpainThe 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 (<i>p</i> < 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.https://www.mdpi.com/1996-1944/14/9/2348dental implantdental implant–abutment designimplant–abutment interfacedental implant abutment connectionmicrogap |
| spellingShingle | Pedro Molinero-Mourelle Rocio Cascos-Sanchez Burak Yilmaz Walter Yu Hang Lam Edmond Ho Nang Pow Jaime Del Río Highsmith Miguel Gómez-Polo 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 dental implant dental implant–abutment design implant–abutment interface dental implant abutment connection microgap |
| title | Effect of Fabrication Technique on the Microgap of CAD/CAM Cobalt–Chrome and Zirconia Abutments on a Conical Connection Implant: An In Vitro Study |
| title_full | Effect of Fabrication Technique on the Microgap of CAD/CAM Cobalt–Chrome and Zirconia Abutments on a Conical Connection Implant: An In Vitro Study |
| title_fullStr | Effect of Fabrication Technique on the Microgap of CAD/CAM Cobalt–Chrome and Zirconia Abutments on a Conical Connection Implant: An In Vitro Study |
| title_full_unstemmed | Effect of Fabrication Technique on the Microgap of CAD/CAM Cobalt–Chrome and Zirconia Abutments on a Conical Connection Implant: An In Vitro Study |
| title_short | Effect of Fabrication Technique on the Microgap of CAD/CAM Cobalt–Chrome and Zirconia Abutments on a Conical Connection Implant: An In Vitro Study |
| title_sort | effect of fabrication technique on the microgap of cad cam cobalt chrome and zirconia abutments on a conical connection implant an in vitro study |
| topic | dental implant dental implant–abutment design implant–abutment interface dental implant abutment connection microgap |
| url | https://www.mdpi.com/1996-1944/14/9/2348 |
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