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Article: 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 | Effect of Fabrication Technique on the Microgap of CAD/CAM Cobalt–Chrome and Zirconia Abutments on a Conical Connection Implant: An In Vitro Study |
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Authors | |
Keywords | dental implant dental implant–abutment design implant–abutment interface dental implant abutment connection microgap |
Issue Date | 2021 |
Publisher | MDPIAG. The Journal's web site is located at http://www.mdpi.com/journal/materials/ |
Citation | Materials, 2021, v. 14 n. 9, p. article no. 2348 How to Cite? |
Abstract | 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. |
Persistent Identifier | http://hdl.handle.net/10722/302368 |
ISSN | 2023 Impact Factor: 3.1 2023 SCImago Journal Rankings: 0.565 |
PubMed Central ID | |
ISI Accession Number ID |
DC Field | Value | Language |
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dc.contributor.author | Molinero-Mourelle, P | - |
dc.contributor.author | Cascos-Sanchez, R | - |
dc.contributor.author | Yilmaz, B | - |
dc.contributor.author | Lam, WYH | - |
dc.contributor.author | Pow, EHN | - |
dc.contributor.author | Del Río Highsmith, J | - |
dc.contributor.author | Gómez-Polo, M | - |
dc.date.accessioned | 2021-09-06T03:31:17Z | - |
dc.date.available | 2021-09-06T03:31:17Z | - |
dc.date.issued | 2021 | - |
dc.identifier.citation | Materials, 2021, v. 14 n. 9, p. article no. 2348 | - |
dc.identifier.issn | 1996-1944 | - |
dc.identifier.uri | http://hdl.handle.net/10722/302368 | - |
dc.description.abstract | 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. | - |
dc.language | eng | - |
dc.publisher | MDPIAG. The Journal's web site is located at http://www.mdpi.com/journal/materials/ | - |
dc.relation.ispartof | Materials | - |
dc.rights | This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License. | - |
dc.subject | dental implant | - |
dc.subject | dental implant–abutment design | - |
dc.subject | implant–abutment interface | - |
dc.subject | dental implant abutment connection | - |
dc.subject | microgap | - |
dc.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 | - |
dc.type | Article | - |
dc.identifier.email | Lam, WYH: retlaw@hku.hk | - |
dc.identifier.email | Pow, EHN: ehnpow@hku.hk | - |
dc.identifier.authority | Lam, WYH=rp02183 | - |
dc.identifier.authority | Pow, EHN=rp00030 | - |
dc.description.nature | published_or_final_version | - |
dc.identifier.doi | 10.3390/ma14092348 | - |
dc.identifier.pmid | 33946477 | - |
dc.identifier.pmcid | PMC8125438 | - |
dc.identifier.scopus | eid_2-s2.0-85105756640 | - |
dc.identifier.hkuros | 324855 | - |
dc.identifier.volume | 14 | - |
dc.identifier.issue | 9 | - |
dc.identifier.spage | article no. 2348 | - |
dc.identifier.epage | article no. 2348 | - |
dc.identifier.isi | WOS:000650563500001 | - |
dc.publisher.place | Switzerland | - |