Cargando…
A Novel Design Modification to Improve Flexural Strength of Zirconia Framework: A Comparative Experimental In Vitro Study
AIM: Zirconia-based restoration is successfully replacing metal ceramic restorations in posterior areas. Although higher mechanical properties of zirconia, their use in compromised situation is questionable. Hence, there is a need to modify the design which to strengthen the framework. The aim of th...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Wolters Kluwer - Medknow
2020
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7595506/ https://www.ncbi.nlm.nih.gov/pubmed/33149511 http://dx.doi.org/10.4103/jpbs.JPBS_146_20 |
_version_ | 1783601890980790272 |
---|---|
author | Shetty, Rajesh Shoukath, Shifa Shetty, Naresh H G Shetty, Sanath K Dandekeri, Savita Ragher, Mallikarjuna |
author_facet | Shetty, Rajesh Shoukath, Shifa Shetty, Naresh H G Shetty, Sanath K Dandekeri, Savita Ragher, Mallikarjuna |
author_sort | Shetty, Rajesh |
collection | PubMed |
description | AIM: Zirconia-based restoration is successfully replacing metal ceramic restorations in posterior areas. Although higher mechanical properties of zirconia, their use in compromised situation is questionable. Hence, there is a need to modify the design which to strengthen the framework. The aim of this in vitro study was to evaluate the influence of lingual collar design on the flexural strength of CAD/CAM-fabricated posterior three-unit zirconia framework. MATERIALS AND METHODS: A mandibular metallic stainless steel master mold is designed for a three-unit fixed partial denture framework. All CAD-milled 20 samples are divided into two groups based on the design. Group A––with collar (10 samples) and Group B––without collar (10 samples), tested using universal testing machine to calculate the mean fracture load and flexural strength. STATISTICAL ANALYSIS USED: Descriptive statistics and independent sample t test were used to find the difference between the groups, and simple linear regression was used to find the relationship between load and displacement between the groups. RESULTS: The result of the mean flexural strength for Group A was 11328.06 ± 3770MPa and for Group B was 7633.95 ± 3196MPa; the mean fracture strength observed for Group A was 1274.04 ± 424MPa and for Group B was 858.80 ± 359MPa. A statistically significant difference was observed in flexural strength between Groups A and B (P < 0.05). CONCLUSION: Zirconia framework with connector dimension of 7 mm(2) with lingual collar design can be successfully incorporated in compromised situation where an ideal connector dimension of 9 mm(2) cannot be placed. |
format | Online Article Text |
id | pubmed-7595506 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Wolters Kluwer - Medknow |
record_format | MEDLINE/PubMed |
spelling | pubmed-75955062020-11-03 A Novel Design Modification to Improve Flexural Strength of Zirconia Framework: A Comparative Experimental In Vitro Study Shetty, Rajesh Shoukath, Shifa Shetty, Naresh H G Shetty, Sanath K Dandekeri, Savita Ragher, Mallikarjuna J Pharm Bioallied Sci Original Article AIM: Zirconia-based restoration is successfully replacing metal ceramic restorations in posterior areas. Although higher mechanical properties of zirconia, their use in compromised situation is questionable. Hence, there is a need to modify the design which to strengthen the framework. The aim of this in vitro study was to evaluate the influence of lingual collar design on the flexural strength of CAD/CAM-fabricated posterior three-unit zirconia framework. MATERIALS AND METHODS: A mandibular metallic stainless steel master mold is designed for a three-unit fixed partial denture framework. All CAD-milled 20 samples are divided into two groups based on the design. Group A––with collar (10 samples) and Group B––without collar (10 samples), tested using universal testing machine to calculate the mean fracture load and flexural strength. STATISTICAL ANALYSIS USED: Descriptive statistics and independent sample t test were used to find the difference between the groups, and simple linear regression was used to find the relationship between load and displacement between the groups. RESULTS: The result of the mean flexural strength for Group A was 11328.06 ± 3770MPa and for Group B was 7633.95 ± 3196MPa; the mean fracture strength observed for Group A was 1274.04 ± 424MPa and for Group B was 858.80 ± 359MPa. A statistically significant difference was observed in flexural strength between Groups A and B (P < 0.05). CONCLUSION: Zirconia framework with connector dimension of 7 mm(2) with lingual collar design can be successfully incorporated in compromised situation where an ideal connector dimension of 9 mm(2) cannot be placed. Wolters Kluwer - Medknow 2020-08 2020-08-28 /pmc/articles/PMC7595506/ /pubmed/33149511 http://dx.doi.org/10.4103/jpbs.JPBS_146_20 Text en Copyright: © 2020 Journal of Pharmacy and Bioallied Sciences http://creativecommons.org/licenses/by-nc-sa/4.0 This is an open access journal, and articles are distributed under the terms of the Creative Commons Attribution-NonCommercial-ShareAlike 4.0 License, which allows others to remix, tweak, and build upon the work non-commercially, as long as appropriate credit is given and the new creations are licensed under the identical terms. |
spellingShingle | Original Article Shetty, Rajesh Shoukath, Shifa Shetty, Naresh H G Shetty, Sanath K Dandekeri, Savita Ragher, Mallikarjuna A Novel Design Modification to Improve Flexural Strength of Zirconia Framework: A Comparative Experimental In Vitro Study |
title | A Novel Design Modification to Improve Flexural Strength of Zirconia Framework: A Comparative Experimental In Vitro Study |
title_full | A Novel Design Modification to Improve Flexural Strength of Zirconia Framework: A Comparative Experimental In Vitro Study |
title_fullStr | A Novel Design Modification to Improve Flexural Strength of Zirconia Framework: A Comparative Experimental In Vitro Study |
title_full_unstemmed | A Novel Design Modification to Improve Flexural Strength of Zirconia Framework: A Comparative Experimental In Vitro Study |
title_short | A Novel Design Modification to Improve Flexural Strength of Zirconia Framework: A Comparative Experimental In Vitro Study |
title_sort | novel design modification to improve flexural strength of zirconia framework: a comparative experimental in vitro study |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7595506/ https://www.ncbi.nlm.nih.gov/pubmed/33149511 http://dx.doi.org/10.4103/jpbs.JPBS_146_20 |
work_keys_str_mv | AT shettyrajesh anoveldesignmodificationtoimproveflexuralstrengthofzirconiaframeworkacomparativeexperimentalinvitrostudy AT shoukathshifa anoveldesignmodificationtoimproveflexuralstrengthofzirconiaframeworkacomparativeexperimentalinvitrostudy AT shettynareshhg anoveldesignmodificationtoimproveflexuralstrengthofzirconiaframeworkacomparativeexperimentalinvitrostudy AT shettysanathk anoveldesignmodificationtoimproveflexuralstrengthofzirconiaframeworkacomparativeexperimentalinvitrostudy AT dandekerisavita anoveldesignmodificationtoimproveflexuralstrengthofzirconiaframeworkacomparativeexperimentalinvitrostudy AT raghermallikarjuna anoveldesignmodificationtoimproveflexuralstrengthofzirconiaframeworkacomparativeexperimentalinvitrostudy AT shettyrajesh noveldesignmodificationtoimproveflexuralstrengthofzirconiaframeworkacomparativeexperimentalinvitrostudy AT shoukathshifa noveldesignmodificationtoimproveflexuralstrengthofzirconiaframeworkacomparativeexperimentalinvitrostudy AT shettynareshhg noveldesignmodificationtoimproveflexuralstrengthofzirconiaframeworkacomparativeexperimentalinvitrostudy AT shettysanathk noveldesignmodificationtoimproveflexuralstrengthofzirconiaframeworkacomparativeexperimentalinvitrostudy AT dandekerisavita noveldesignmodificationtoimproveflexuralstrengthofzirconiaframeworkacomparativeexperimentalinvitrostudy AT raghermallikarjuna noveldesignmodificationtoimproveflexuralstrengthofzirconiaframeworkacomparativeexperimentalinvitrostudy |