Cargando…
A comparative evaluation of vertical marginal fit of provisional crowns fabricated by computer-aided design/computer-aided manufacturing technique and direct (intraoral technique) and flexural strength of the materials: An in vitro study
BACKGROUND: With the advent of new provisional crown materials, it has become imperative to evaluate their marginal fit and strength to select the ideal provisional crown material. AIM: The purpose of this in vitro study was to evaluate and compare the vertical marginal fit and flexural strength of...
Autores principales: | , , , , , |
---|---|
Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Medknow Publications & Media Pvt Ltd
2018
|
Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6180741/ https://www.ncbi.nlm.nih.gov/pubmed/30449959 http://dx.doi.org/10.4103/jips.jips_306_17 |
_version_ | 1783362271311822848 |
---|---|
author | Dureja, Ishita Yadav, Bhupender Malhotra, Puja Dabas, Nupur Bhargava, Akshay Pahwa, Ripul |
author_facet | Dureja, Ishita Yadav, Bhupender Malhotra, Puja Dabas, Nupur Bhargava, Akshay Pahwa, Ripul |
author_sort | Dureja, Ishita |
collection | PubMed |
description | BACKGROUND: With the advent of new provisional crown materials, it has become imperative to evaluate their marginal fit and strength to select the ideal provisional crown material. AIM: The purpose of this in vitro study was to evaluate and compare the vertical marginal fit and flexural strength of provisional crowns prepared using computer-aided design-computer-aided manufacturing (CAD-CAM) temporary material versus those fabricated using bis-acrylic composite-based autopolymerizing resin material. MATERIALS AND METHODS: Eighty samples were divided into two equal Groups (I and II). Group I consisted of forty samples that were evaluated for flexural strength and Group II consisted of forty samples that were evaluated for their vertical marginal fit. Group I was subdivided as Group IA, i.e., bis-acrylic composite-based autopolymerizing resin material (Protemp™ 4) blocks and Group IB, i.e., CAD/CAM provisional material blocks. Similarly, Group II was subdivided as Group IIA, i.e., bis-acrylic composite-based autopolymerizing resin material (Protemp™ 4) crowns and Group IIB, i.e., CAD/CAM provisional material crowns. Marginal adaptation was evaluated using stereomicroscope and image analyzing software to measure the amount of marginal gap. For flexural strength, all specimens were subjected to a standard compression load in the universal testing machine until fracture occurred. Data were analyzed using Student's t-test (P = 0.001). RESULTS: CAD/CAM provisional crowns showed better marginal adaptation (34.34 μm) as compared to bis-acrylic composite-based autopolymerizing resin material (Protemp™ 4) crowns (63.42 μm) (P < 0.001). The flexural strength of CAD/CAM blocks (94.06 megapascals [MPa]) was not statistically different from bis-acrylic composite-based autopolymerizing resin material (Protemp™ 4) blocks (101.41 MPa) (P > 0.001). CONCLUSION: Protemp™ 4 and CAD/CAM provisional materials have comparable flexural strength. However, the marginal fit of temporary crowns fabricated by CAD/CAM was found to be superior to the ones fabricated using bis-acrylic composite-based autopolymerizing resin material (Protemp™ 4). |
format | Online Article Text |
id | pubmed-6180741 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Medknow Publications & Media Pvt Ltd |
record_format | MEDLINE/PubMed |
spelling | pubmed-61807412019-10-01 A comparative evaluation of vertical marginal fit of provisional crowns fabricated by computer-aided design/computer-aided manufacturing technique and direct (intraoral technique) and flexural strength of the materials: An in vitro study Dureja, Ishita Yadav, Bhupender Malhotra, Puja Dabas, Nupur Bhargava, Akshay Pahwa, Ripul J Indian Prosthodont Soc Original Article BACKGROUND: With the advent of new provisional crown materials, it has become imperative to evaluate their marginal fit and strength to select the ideal provisional crown material. AIM: The purpose of this in vitro study was to evaluate and compare the vertical marginal fit and flexural strength of provisional crowns prepared using computer-aided design-computer-aided manufacturing (CAD-CAM) temporary material versus those fabricated using bis-acrylic composite-based autopolymerizing resin material. MATERIALS AND METHODS: Eighty samples were divided into two equal Groups (I and II). Group I consisted of forty samples that were evaluated for flexural strength and Group II consisted of forty samples that were evaluated for their vertical marginal fit. Group I was subdivided as Group IA, i.e., bis-acrylic composite-based autopolymerizing resin material (Protemp™ 4) blocks and Group IB, i.e., CAD/CAM provisional material blocks. Similarly, Group II was subdivided as Group IIA, i.e., bis-acrylic composite-based autopolymerizing resin material (Protemp™ 4) crowns and Group IIB, i.e., CAD/CAM provisional material crowns. Marginal adaptation was evaluated using stereomicroscope and image analyzing software to measure the amount of marginal gap. For flexural strength, all specimens were subjected to a standard compression load in the universal testing machine until fracture occurred. Data were analyzed using Student's t-test (P = 0.001). RESULTS: CAD/CAM provisional crowns showed better marginal adaptation (34.34 μm) as compared to bis-acrylic composite-based autopolymerizing resin material (Protemp™ 4) crowns (63.42 μm) (P < 0.001). The flexural strength of CAD/CAM blocks (94.06 megapascals [MPa]) was not statistically different from bis-acrylic composite-based autopolymerizing resin material (Protemp™ 4) blocks (101.41 MPa) (P > 0.001). CONCLUSION: Protemp™ 4 and CAD/CAM provisional materials have comparable flexural strength. However, the marginal fit of temporary crowns fabricated by CAD/CAM was found to be superior to the ones fabricated using bis-acrylic composite-based autopolymerizing resin material (Protemp™ 4). Medknow Publications & Media Pvt Ltd 2018 /pmc/articles/PMC6180741/ /pubmed/30449959 http://dx.doi.org/10.4103/jips.jips_306_17 Text en Copyright: © 2018 The Journal of Indian Prosthodontic Society 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 Dureja, Ishita Yadav, Bhupender Malhotra, Puja Dabas, Nupur Bhargava, Akshay Pahwa, Ripul A comparative evaluation of vertical marginal fit of provisional crowns fabricated by computer-aided design/computer-aided manufacturing technique and direct (intraoral technique) and flexural strength of the materials: An in vitro study |
title | A comparative evaluation of vertical marginal fit of provisional crowns fabricated by computer-aided design/computer-aided manufacturing technique and direct (intraoral technique) and flexural strength of the materials: An in vitro study |
title_full | A comparative evaluation of vertical marginal fit of provisional crowns fabricated by computer-aided design/computer-aided manufacturing technique and direct (intraoral technique) and flexural strength of the materials: An in vitro study |
title_fullStr | A comparative evaluation of vertical marginal fit of provisional crowns fabricated by computer-aided design/computer-aided manufacturing technique and direct (intraoral technique) and flexural strength of the materials: An in vitro study |
title_full_unstemmed | A comparative evaluation of vertical marginal fit of provisional crowns fabricated by computer-aided design/computer-aided manufacturing technique and direct (intraoral technique) and flexural strength of the materials: An in vitro study |
title_short | A comparative evaluation of vertical marginal fit of provisional crowns fabricated by computer-aided design/computer-aided manufacturing technique and direct (intraoral technique) and flexural strength of the materials: An in vitro study |
title_sort | comparative evaluation of vertical marginal fit of provisional crowns fabricated by computer-aided design/computer-aided manufacturing technique and direct (intraoral technique) and flexural strength of the materials: an in vitro study |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6180741/ https://www.ncbi.nlm.nih.gov/pubmed/30449959 http://dx.doi.org/10.4103/jips.jips_306_17 |
work_keys_str_mv | AT durejaishita acomparativeevaluationofverticalmarginalfitofprovisionalcrownsfabricatedbycomputeraideddesigncomputeraidedmanufacturingtechniqueanddirectintraoraltechniqueandflexuralstrengthofthematerialsaninvitrostudy AT yadavbhupender acomparativeevaluationofverticalmarginalfitofprovisionalcrownsfabricatedbycomputeraideddesigncomputeraidedmanufacturingtechniqueanddirectintraoraltechniqueandflexuralstrengthofthematerialsaninvitrostudy AT malhotrapuja acomparativeevaluationofverticalmarginalfitofprovisionalcrownsfabricatedbycomputeraideddesigncomputeraidedmanufacturingtechniqueanddirectintraoraltechniqueandflexuralstrengthofthematerialsaninvitrostudy AT dabasnupur acomparativeevaluationofverticalmarginalfitofprovisionalcrownsfabricatedbycomputeraideddesigncomputeraidedmanufacturingtechniqueanddirectintraoraltechniqueandflexuralstrengthofthematerialsaninvitrostudy AT bhargavaakshay acomparativeevaluationofverticalmarginalfitofprovisionalcrownsfabricatedbycomputeraideddesigncomputeraidedmanufacturingtechniqueanddirectintraoraltechniqueandflexuralstrengthofthematerialsaninvitrostudy AT pahwaripul acomparativeevaluationofverticalmarginalfitofprovisionalcrownsfabricatedbycomputeraideddesigncomputeraidedmanufacturingtechniqueanddirectintraoraltechniqueandflexuralstrengthofthematerialsaninvitrostudy AT durejaishita comparativeevaluationofverticalmarginalfitofprovisionalcrownsfabricatedbycomputeraideddesigncomputeraidedmanufacturingtechniqueanddirectintraoraltechniqueandflexuralstrengthofthematerialsaninvitrostudy AT yadavbhupender comparativeevaluationofverticalmarginalfitofprovisionalcrownsfabricatedbycomputeraideddesigncomputeraidedmanufacturingtechniqueanddirectintraoraltechniqueandflexuralstrengthofthematerialsaninvitrostudy AT malhotrapuja comparativeevaluationofverticalmarginalfitofprovisionalcrownsfabricatedbycomputeraideddesigncomputeraidedmanufacturingtechniqueanddirectintraoraltechniqueandflexuralstrengthofthematerialsaninvitrostudy AT dabasnupur comparativeevaluationofverticalmarginalfitofprovisionalcrownsfabricatedbycomputeraideddesigncomputeraidedmanufacturingtechniqueanddirectintraoraltechniqueandflexuralstrengthofthematerialsaninvitrostudy AT bhargavaakshay comparativeevaluationofverticalmarginalfitofprovisionalcrownsfabricatedbycomputeraideddesigncomputeraidedmanufacturingtechniqueanddirectintraoraltechniqueandflexuralstrengthofthematerialsaninvitrostudy AT pahwaripul comparativeevaluationofverticalmarginalfitofprovisionalcrownsfabricatedbycomputeraideddesigncomputeraidedmanufacturingtechniqueanddirectintraoraltechniqueandflexuralstrengthofthematerialsaninvitrostudy |