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The effect of various veneering techniques on the marginal fit of zirconia copings
PURPOSE: This study aimed to evaluate the fit of zirconia ceramics before and after veneering, using 3 different veneering processes (layering, press-over, and CAD-on techniques). MATERIALS AND METHODS: Thirty standardized zirconia CAD/CAM frameworks were constructed and divided into three groups of...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
The Korean Academy of Prosthodontics
2015
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4486619/ https://www.ncbi.nlm.nih.gov/pubmed/26140175 http://dx.doi.org/10.4047/jap.2015.7.3.233 |
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author | Torabi, Kianoosh Vojdani, Mahroo Giti, Rashin Taghva, Masumeh Pardis, Soheil |
author_facet | Torabi, Kianoosh Vojdani, Mahroo Giti, Rashin Taghva, Masumeh Pardis, Soheil |
author_sort | Torabi, Kianoosh |
collection | PubMed |
description | PURPOSE: This study aimed to evaluate the fit of zirconia ceramics before and after veneering, using 3 different veneering processes (layering, press-over, and CAD-on techniques). MATERIALS AND METHODS: Thirty standardized zirconia CAD/CAM frameworks were constructed and divided into three groups of 10 each. The first group was veneered using the traditional layering technique. Press-over and CAD-on techniques were used to veneer second and third groups. The marginal gap of specimens was measured before and after veneering process at 18 sites on the master die using a digital microscope. Paired t-test was used to evaluate mean marginal gap changes. One-way ANOVA and post hoc tests were also employed for comparison among 3 groups (α=.05). RESULTS: Marginal gap of 3 groups was increased after porcelain veneering. The mean marginal gap values after veneering in the layering group (63.06 µm) was higher than press-over (50.64 µm) and CAD-on (51.50 µm) veneered groups (P<.001). CONCLUSION: Three veneering methods altered the marginal fit of zirconia copings. Conventional layering technique increased the marginal gap of zirconia framework more than pressing and CAD-on techniques. All ceramic crowns made through three different veneering methods revealed clinically acceptable marginal fit. |
format | Online Article Text |
id | pubmed-4486619 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2015 |
publisher | The Korean Academy of Prosthodontics |
record_format | MEDLINE/PubMed |
spelling | pubmed-44866192015-07-02 The effect of various veneering techniques on the marginal fit of zirconia copings Torabi, Kianoosh Vojdani, Mahroo Giti, Rashin Taghva, Masumeh Pardis, Soheil J Adv Prosthodont Original Article PURPOSE: This study aimed to evaluate the fit of zirconia ceramics before and after veneering, using 3 different veneering processes (layering, press-over, and CAD-on techniques). MATERIALS AND METHODS: Thirty standardized zirconia CAD/CAM frameworks were constructed and divided into three groups of 10 each. The first group was veneered using the traditional layering technique. Press-over and CAD-on techniques were used to veneer second and third groups. The marginal gap of specimens was measured before and after veneering process at 18 sites on the master die using a digital microscope. Paired t-test was used to evaluate mean marginal gap changes. One-way ANOVA and post hoc tests were also employed for comparison among 3 groups (α=.05). RESULTS: Marginal gap of 3 groups was increased after porcelain veneering. The mean marginal gap values after veneering in the layering group (63.06 µm) was higher than press-over (50.64 µm) and CAD-on (51.50 µm) veneered groups (P<.001). CONCLUSION: Three veneering methods altered the marginal fit of zirconia copings. Conventional layering technique increased the marginal gap of zirconia framework more than pressing and CAD-on techniques. All ceramic crowns made through three different veneering methods revealed clinically acceptable marginal fit. The Korean Academy of Prosthodontics 2015-06 2015-06-23 /pmc/articles/PMC4486619/ /pubmed/26140175 http://dx.doi.org/10.4047/jap.2015.7.3.233 Text en © 2015 The Korean Academy of Prosthodontics http://creativecommons.org/licenses/by-nc/3.0/ This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Original Article Torabi, Kianoosh Vojdani, Mahroo Giti, Rashin Taghva, Masumeh Pardis, Soheil The effect of various veneering techniques on the marginal fit of zirconia copings |
title | The effect of various veneering techniques on the marginal fit of zirconia copings |
title_full | The effect of various veneering techniques on the marginal fit of zirconia copings |
title_fullStr | The effect of various veneering techniques on the marginal fit of zirconia copings |
title_full_unstemmed | The effect of various veneering techniques on the marginal fit of zirconia copings |
title_short | The effect of various veneering techniques on the marginal fit of zirconia copings |
title_sort | effect of various veneering techniques on the marginal fit of zirconia copings |
topic | Original Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4486619/ https://www.ncbi.nlm.nih.gov/pubmed/26140175 http://dx.doi.org/10.4047/jap.2015.7.3.233 |
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