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Effect of sintering time on the marginal and internal fit of monolithic zirconia crowns containing 3–4 mol% Y(2)O(3)

BACKGROUND: Short-term sintering may offer advantages including saving time and energy but there is limited evidence on the effect that altering sintering time has on the accuracy of monolithic zirconia crowns. The purpose of this in vitro study was to investigate the effect of shortened sintering t...

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Autores principales: Ozden, Yunus Emre, Guncu, Mustafa Baris, Aktas, Guliz, Canay, Senay
Formato: Online Artículo Texto
Lenguaje:English
Publicado: BioMed Central 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9664799/
https://www.ncbi.nlm.nih.gov/pubmed/36380324
http://dx.doi.org/10.1186/s12903-022-02563-x
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author Ozden, Yunus Emre
Guncu, Mustafa Baris
Aktas, Guliz
Canay, Senay
author_facet Ozden, Yunus Emre
Guncu, Mustafa Baris
Aktas, Guliz
Canay, Senay
author_sort Ozden, Yunus Emre
collection PubMed
description BACKGROUND: Short-term sintering may offer advantages including saving time and energy but there is limited evidence on the effect that altering sintering time has on the accuracy of monolithic zirconia crowns. The purpose of this in vitro study was to investigate the effect of shortened sintering time on the marginal and internal fit of 3Y-TZP and 4Y-TZP monolithic crowns. METHODS: Sixty monolithic zirconia crowns were fabricated for the maxillary first molar tooth on the prefabricated implant abutment. Groups were created according to the material composition: 3Y-TZP Generation 1, 3Y-TZP Generation 2 and 4Y-TZP. Two different sintering protocols were performed: same final sintering temperature (1500 °C) and various rates of heating (10 °C/min and 40 °C/min), cooling down speed (− 10 °C/min and − 40 °C/min), holding time (45 and 120 minutes), and total sintering time (approximately 2 and 7 hours, respectively). The marginal and internal fit of the crowns were determined using the silicone replica technique. Comparisons between groups were analyzed using two-way ANOVA. Pairwise multiple comparisons were performed using t-test (p < 0.05). RESULTS: The mean marginal gap values of 4Y-TZP zirconia revealed statistically significant increase for the short-term sintering protocol (p < 0.0001), while no difference was observed between the sintering protocols for the mean marginal gap values of 3Y-TZP groups. Although all groups showed clinically acceptable gap values, altering the sintering time had an effect on marginal fit of the crowns manufactured from 4Y-TZP zirconia. CONCLUSIONS: Shortening the sintering time may lead to differences within clinically acceptable limits. The manufacturer’s recommendations according to material composition should be implemented with care.
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spelling pubmed-96647992022-11-15 Effect of sintering time on the marginal and internal fit of monolithic zirconia crowns containing 3–4 mol% Y(2)O(3) Ozden, Yunus Emre Guncu, Mustafa Baris Aktas, Guliz Canay, Senay BMC Oral Health Research Article BACKGROUND: Short-term sintering may offer advantages including saving time and energy but there is limited evidence on the effect that altering sintering time has on the accuracy of monolithic zirconia crowns. The purpose of this in vitro study was to investigate the effect of shortened sintering time on the marginal and internal fit of 3Y-TZP and 4Y-TZP monolithic crowns. METHODS: Sixty monolithic zirconia crowns were fabricated for the maxillary first molar tooth on the prefabricated implant abutment. Groups were created according to the material composition: 3Y-TZP Generation 1, 3Y-TZP Generation 2 and 4Y-TZP. Two different sintering protocols were performed: same final sintering temperature (1500 °C) and various rates of heating (10 °C/min and 40 °C/min), cooling down speed (− 10 °C/min and − 40 °C/min), holding time (45 and 120 minutes), and total sintering time (approximately 2 and 7 hours, respectively). The marginal and internal fit of the crowns were determined using the silicone replica technique. Comparisons between groups were analyzed using two-way ANOVA. Pairwise multiple comparisons were performed using t-test (p < 0.05). RESULTS: The mean marginal gap values of 4Y-TZP zirconia revealed statistically significant increase for the short-term sintering protocol (p < 0.0001), while no difference was observed between the sintering protocols for the mean marginal gap values of 3Y-TZP groups. Although all groups showed clinically acceptable gap values, altering the sintering time had an effect on marginal fit of the crowns manufactured from 4Y-TZP zirconia. CONCLUSIONS: Shortening the sintering time may lead to differences within clinically acceptable limits. The manufacturer’s recommendations according to material composition should be implemented with care. BioMed Central 2022-11-15 /pmc/articles/PMC9664799/ /pubmed/36380324 http://dx.doi.org/10.1186/s12903-022-02563-x Text en © The Author(s) 2022 https://creativecommons.org/licenses/by/4.0/Open AccessThis article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) . The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/ (https://creativecommons.org/publicdomain/zero/1.0/) ) applies to the data made available in this article, unless otherwise stated in a credit line to the data.
spellingShingle Research Article
Ozden, Yunus Emre
Guncu, Mustafa Baris
Aktas, Guliz
Canay, Senay
Effect of sintering time on the marginal and internal fit of monolithic zirconia crowns containing 3–4 mol% Y(2)O(3)
title Effect of sintering time on the marginal and internal fit of monolithic zirconia crowns containing 3–4 mol% Y(2)O(3)
title_full Effect of sintering time on the marginal and internal fit of monolithic zirconia crowns containing 3–4 mol% Y(2)O(3)
title_fullStr Effect of sintering time on the marginal and internal fit of monolithic zirconia crowns containing 3–4 mol% Y(2)O(3)
title_full_unstemmed Effect of sintering time on the marginal and internal fit of monolithic zirconia crowns containing 3–4 mol% Y(2)O(3)
title_short Effect of sintering time on the marginal and internal fit of monolithic zirconia crowns containing 3–4 mol% Y(2)O(3)
title_sort effect of sintering time on the marginal and internal fit of monolithic zirconia crowns containing 3–4 mol% y(2)o(3)
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9664799/
https://www.ncbi.nlm.nih.gov/pubmed/36380324
http://dx.doi.org/10.1186/s12903-022-02563-x
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