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Polishing of Monolithic Zirconia Crowns—Results of Different Dental Practitioner Groups

This pilot study evaluates the surface roughness of monolithic zirconia crowns after chairside polishing by different dental practitioner groups. Four practitioner groups (group I: dental clinical students (n = 6); group II: dentists < 2 years post-qualification experience (n = 6); group III: den...

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Autores principales: Kozmacs, Carla, Hollmann, Britta, Arnold, Wolfgang H., Naumova, Ella, Piwowarczyk, Andree
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2017
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5806964/
https://www.ncbi.nlm.nih.gov/pubmed/29563437
http://dx.doi.org/10.3390/dj5040030
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author Kozmacs, Carla
Hollmann, Britta
Arnold, Wolfgang H.
Naumova, Ella
Piwowarczyk, Andree
author_facet Kozmacs, Carla
Hollmann, Britta
Arnold, Wolfgang H.
Naumova, Ella
Piwowarczyk, Andree
author_sort Kozmacs, Carla
collection PubMed
description This pilot study evaluates the surface roughness of monolithic zirconia crowns after chairside polishing by different dental practitioner groups. Four practitioner groups (group I: dental clinical students (n = 6); group II: dentists < 2 years post-qualification experience (n = 6); group III: dentists > 2 years post-qualification experience (n = 6) and group IV: dental technicians (n = 6)) were asked to polish two CAD/CAM-fabricated full-contour zirconia crowns (48 in total). A two-step zirconia polishing kit was used in both trials. The first trial (T1) was conducted without a time limitation. In the second trial (T2), the polish was restricted to 15 seconds for each polisher. Two blinded investigators (I1 and I2) analyzed the surface roughness (Ra) before and after polishing (Alicona measuring system). No statistically significant difference in surface roughness was found between the polishing results of the dental practitioner groups. Major difference in surface finish was achieved by dental technicians, with a median value of 25.4 nm (interquartile range 10.15–35.26 nm) for I1 in T1. The lowest difference was achieved by dental students, with a median value of Ra = 6.72 nm (interquartile range 4.7–17.9 nm) in T1. In T2, experienced dentists showed the highest difference in surface finish, with a median value of 41.35 nm (interquartile range 7.77–54.11). No significant correlation was found between polishing time and polishing results. The polishing of monolithic zirconium dioxide crowns can be performed with the present polishing set directly chairside after occlusal adjustment, regardless of the practitioner’s experience level.
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spelling pubmed-58069642018-03-16 Polishing of Monolithic Zirconia Crowns—Results of Different Dental Practitioner Groups Kozmacs, Carla Hollmann, Britta Arnold, Wolfgang H. Naumova, Ella Piwowarczyk, Andree Dent J (Basel) Article This pilot study evaluates the surface roughness of monolithic zirconia crowns after chairside polishing by different dental practitioner groups. Four practitioner groups (group I: dental clinical students (n = 6); group II: dentists < 2 years post-qualification experience (n = 6); group III: dentists > 2 years post-qualification experience (n = 6) and group IV: dental technicians (n = 6)) were asked to polish two CAD/CAM-fabricated full-contour zirconia crowns (48 in total). A two-step zirconia polishing kit was used in both trials. The first trial (T1) was conducted without a time limitation. In the second trial (T2), the polish was restricted to 15 seconds for each polisher. Two blinded investigators (I1 and I2) analyzed the surface roughness (Ra) before and after polishing (Alicona measuring system). No statistically significant difference in surface roughness was found between the polishing results of the dental practitioner groups. Major difference in surface finish was achieved by dental technicians, with a median value of 25.4 nm (interquartile range 10.15–35.26 nm) for I1 in T1. The lowest difference was achieved by dental students, with a median value of Ra = 6.72 nm (interquartile range 4.7–17.9 nm) in T1. In T2, experienced dentists showed the highest difference in surface finish, with a median value of 41.35 nm (interquartile range 7.77–54.11). No significant correlation was found between polishing time and polishing results. The polishing of monolithic zirconium dioxide crowns can be performed with the present polishing set directly chairside after occlusal adjustment, regardless of the practitioner’s experience level. MDPI 2017-11-14 /pmc/articles/PMC5806964/ /pubmed/29563437 http://dx.doi.org/10.3390/dj5040030 Text en © 2017 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Kozmacs, Carla
Hollmann, Britta
Arnold, Wolfgang H.
Naumova, Ella
Piwowarczyk, Andree
Polishing of Monolithic Zirconia Crowns—Results of Different Dental Practitioner Groups
title Polishing of Monolithic Zirconia Crowns—Results of Different Dental Practitioner Groups
title_full Polishing of Monolithic Zirconia Crowns—Results of Different Dental Practitioner Groups
title_fullStr Polishing of Monolithic Zirconia Crowns—Results of Different Dental Practitioner Groups
title_full_unstemmed Polishing of Monolithic Zirconia Crowns—Results of Different Dental Practitioner Groups
title_short Polishing of Monolithic Zirconia Crowns—Results of Different Dental Practitioner Groups
title_sort polishing of monolithic zirconia crowns—results of different dental practitioner groups
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5806964/
https://www.ncbi.nlm.nih.gov/pubmed/29563437
http://dx.doi.org/10.3390/dj5040030
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