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Effect of Margin Designs on the Marginal Adaptation of Zirconia Copings

OBJECTIVE: The aim of this in vitro study was to investigate the effect of Shoulder versus Chamfer margin design on the marginal adaptation of zirconia (Zr) copings. MATERIALS AND METHODS: 40 extracted molar teeth were mounted in resin and prepared for zirconia crowns with two margin preparation des...

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Autores principales: Habib, Syed Rashid, Al Ajmi, Mohammed Ginan, Al Dhafyan, Mohammed, Jomah, Abdulrehman, Abualsaud, Haytham, Almashali, Mazen
Formato: Online Artículo Texto
Lenguaje:English
Publicado: University of Zagreb School of Dental Medicine, and Croatian Dental Society - Croatian Medical Association 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5708331/
https://www.ncbi.nlm.nih.gov/pubmed/29225358
http://dx.doi.org/10.15644/asc51/3/1
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author Habib, Syed Rashid
Al Ajmi, Mohammed Ginan
Al Dhafyan, Mohammed
Jomah, Abdulrehman
Abualsaud, Haytham
Almashali, Mazen
author_facet Habib, Syed Rashid
Al Ajmi, Mohammed Ginan
Al Dhafyan, Mohammed
Jomah, Abdulrehman
Abualsaud, Haytham
Almashali, Mazen
author_sort Habib, Syed Rashid
collection PubMed
description OBJECTIVE: The aim of this in vitro study was to investigate the effect of Shoulder versus Chamfer margin design on the marginal adaptation of zirconia (Zr) copings. MATERIALS AND METHODS: 40 extracted molar teeth were mounted in resin and prepared for zirconia crowns with two margin preparation designs (20=Shoulder and 20=Chamfer). The copings were manufactured by Cercon® (DeguDent GmbH, Germany) using the CAD/CAM system for each tooth. They were tried on each tooth, cemented, thermocycled, re-embedded in resin and were subsequently cross sectioned centrally into two equal mesial and distal halves. They were examined under electron microscope at 200 X magnification and the measurements were recorded at 5 predetermined points in micrometers (µm). RESULTS: The overall mean marginal gap for the two groups was found to be 206.98+42.78µm with Shoulder margin design (Marginal Gap=199.50+40.72µm) having better adaptation compared to Chamfer (Marginal Gap=214.46+44.85µm). The independent-samples t-test showed a statistically non-significant difference (p=.113) between the means of marginal gap for Shoulder and Chamfer margin designs and the measurements were recorded at 5 predetermined points for the two groups. CONCLUSIONS: The Chamfer margin design appeared to offer the same adaptation results as the Shoulder margin design.
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spelling pubmed-57083312017-12-08 Effect of Margin Designs on the Marginal Adaptation of Zirconia Copings Habib, Syed Rashid Al Ajmi, Mohammed Ginan Al Dhafyan, Mohammed Jomah, Abdulrehman Abualsaud, Haytham Almashali, Mazen Acta Stomatol Croat Original Scientific Papers OBJECTIVE: The aim of this in vitro study was to investigate the effect of Shoulder versus Chamfer margin design on the marginal adaptation of zirconia (Zr) copings. MATERIALS AND METHODS: 40 extracted molar teeth were mounted in resin and prepared for zirconia crowns with two margin preparation designs (20=Shoulder and 20=Chamfer). The copings were manufactured by Cercon® (DeguDent GmbH, Germany) using the CAD/CAM system for each tooth. They were tried on each tooth, cemented, thermocycled, re-embedded in resin and were subsequently cross sectioned centrally into two equal mesial and distal halves. They were examined under electron microscope at 200 X magnification and the measurements were recorded at 5 predetermined points in micrometers (µm). RESULTS: The overall mean marginal gap for the two groups was found to be 206.98+42.78µm with Shoulder margin design (Marginal Gap=199.50+40.72µm) having better adaptation compared to Chamfer (Marginal Gap=214.46+44.85µm). The independent-samples t-test showed a statistically non-significant difference (p=.113) between the means of marginal gap for Shoulder and Chamfer margin designs and the measurements were recorded at 5 predetermined points for the two groups. CONCLUSIONS: The Chamfer margin design appeared to offer the same adaptation results as the Shoulder margin design. University of Zagreb School of Dental Medicine, and Croatian Dental Society - Croatian Medical Association 2017-09 /pmc/articles/PMC5708331/ /pubmed/29225358 http://dx.doi.org/10.15644/asc51/3/1 Text en http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution Non-Commercial No Derivatives (CC BY-NC-ND) 4.0 License.
spellingShingle Original Scientific Papers
Habib, Syed Rashid
Al Ajmi, Mohammed Ginan
Al Dhafyan, Mohammed
Jomah, Abdulrehman
Abualsaud, Haytham
Almashali, Mazen
Effect of Margin Designs on the Marginal Adaptation of Zirconia Copings
title Effect of Margin Designs on the Marginal Adaptation of Zirconia Copings
title_full Effect of Margin Designs on the Marginal Adaptation of Zirconia Copings
title_fullStr Effect of Margin Designs on the Marginal Adaptation of Zirconia Copings
title_full_unstemmed Effect of Margin Designs on the Marginal Adaptation of Zirconia Copings
title_short Effect of Margin Designs on the Marginal Adaptation of Zirconia Copings
title_sort effect of margin designs on the marginal adaptation of zirconia copings
topic Original Scientific Papers
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5708331/
https://www.ncbi.nlm.nih.gov/pubmed/29225358
http://dx.doi.org/10.15644/asc51/3/1
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