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Comparison of Retention and Seating of Implant-Supported Hard and Soft Metal Copings
OBJECTIVES: Implant-supported restorations are generally used for the replacement of the lost teeth. Stability against masticatory forces and proper retention are critical for optimal durability of restorations. The aim of this experimental study was to compare the retention of cobalt-chromium (Co-C...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
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Tehran University of Medical Sciences
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9375120/ https://www.ncbi.nlm.nih.gov/pubmed/36042806 http://dx.doi.org/10.18502/fid.v17i26.4652 |
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author | Ghodsi, Safoura Fayyazi, Anahita Ghiasi, Maryam Rohanian, Ahmad Alikhasi, Marzieh |
author_facet | Ghodsi, Safoura Fayyazi, Anahita Ghiasi, Maryam Rohanian, Ahmad Alikhasi, Marzieh |
author_sort | Ghodsi, Safoura |
collection | PubMed |
description | OBJECTIVES: Implant-supported restorations are generally used for the replacement of the lost teeth. Stability against masticatory forces and proper retention are critical for optimal durability of restorations. The aim of this experimental study was to compare the retention of cobalt-chromium (Co-Cr) copings made by different techniques. MATERIALS AND METHODS: Twenty-four solid abutment analogs were mounted and scanned with a desktop scanner. They were divided into two groups (n=12) and received metal copings fabricated by either soft or hard Co-Cr alloy. Soft Ceramill Sintron Co-Cr patterns were milled and sintered. Hard Co-Cr blocks were milled in a milling machine. The copings were sandblasted, polished, adjusted, and placed on the respective abutments. The frequency of adjustments was recorded for each abutment. The copings were cemented with zinc phosphate cement and underwent tensile test by a universal testing machine. The Mann-Whitney test and t-test were used to compare the two groups (α=0.05). RESULTS: There was no significant difference in retention of copings between the experimental groups. The mean retentive force was 559.58±115.66 N and 557.13 ±130.48 N for the soft and hard metal groups, respectively (P=0.96). Considering the non-normal distribution of adjustment frequency data, the Mann-Whitney test showed that the frequency of adjustments was significantly higher in the hard metal group than the soft metal group (9.5 versus 0.1667; P<0.001). CONCLUSION: Although hard metal copings required more adjustments, retention of soft and hard Co-Cr copings was not significantly different. |
format | Online Article Text |
id | pubmed-9375120 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Tehran University of Medical Sciences |
record_format | MEDLINE/PubMed |
spelling | pubmed-93751202022-08-29 Comparison of Retention and Seating of Implant-Supported Hard and Soft Metal Copings Ghodsi, Safoura Fayyazi, Anahita Ghiasi, Maryam Rohanian, Ahmad Alikhasi, Marzieh Front Dent Original Article OBJECTIVES: Implant-supported restorations are generally used for the replacement of the lost teeth. Stability against masticatory forces and proper retention are critical for optimal durability of restorations. The aim of this experimental study was to compare the retention of cobalt-chromium (Co-Cr) copings made by different techniques. MATERIALS AND METHODS: Twenty-four solid abutment analogs were mounted and scanned with a desktop scanner. They were divided into two groups (n=12) and received metal copings fabricated by either soft or hard Co-Cr alloy. Soft Ceramill Sintron Co-Cr patterns were milled and sintered. Hard Co-Cr blocks were milled in a milling machine. The copings were sandblasted, polished, adjusted, and placed on the respective abutments. The frequency of adjustments was recorded for each abutment. The copings were cemented with zinc phosphate cement and underwent tensile test by a universal testing machine. The Mann-Whitney test and t-test were used to compare the two groups (α=0.05). RESULTS: There was no significant difference in retention of copings between the experimental groups. The mean retentive force was 559.58±115.66 N and 557.13 ±130.48 N for the soft and hard metal groups, respectively (P=0.96). Considering the non-normal distribution of adjustment frequency data, the Mann-Whitney test showed that the frequency of adjustments was significantly higher in the hard metal group than the soft metal group (9.5 versus 0.1667; P<0.001). CONCLUSION: Although hard metal copings required more adjustments, retention of soft and hard Co-Cr copings was not significantly different. Tehran University of Medical Sciences 2020-10-26 /pmc/articles/PMC9375120/ /pubmed/36042806 http://dx.doi.org/10.18502/fid.v17i26.4652 Text en Copyright © 2020 The Authors. Published by Tehran University of Medical Sciences https://creativecommons.org/licenses/by-nc/4.0/This work is published as an open access article distributed under the terms of the Creative Commons Attribution 4.0 License (http://creativecommons.org/licenses/by-nc/4 (https://creativecommons.org/licenses/by-nc/4.0/) ). Non-commercial uses of the work are permitted, provided the original work is properly cited. |
spellingShingle | Original Article Ghodsi, Safoura Fayyazi, Anahita Ghiasi, Maryam Rohanian, Ahmad Alikhasi, Marzieh Comparison of Retention and Seating of Implant-Supported Hard and Soft Metal Copings |
title | Comparison of Retention and Seating of Implant-Supported Hard and Soft Metal Copings |
title_full | Comparison of Retention and Seating of Implant-Supported Hard and Soft Metal Copings |
title_fullStr | Comparison of Retention and Seating of Implant-Supported Hard and Soft Metal Copings |
title_full_unstemmed | Comparison of Retention and Seating of Implant-Supported Hard and Soft Metal Copings |
title_short | Comparison of Retention and Seating of Implant-Supported Hard and Soft Metal Copings |
title_sort | comparison of retention and seating of implant-supported hard and soft metal copings |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9375120/ https://www.ncbi.nlm.nih.gov/pubmed/36042806 http://dx.doi.org/10.18502/fid.v17i26.4652 |
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