Histopathologic Study of Caries at the Full and Partial Crowns Finish Line

BACKGROUND AND OBJECTIVE: The cast crowns replace lost tooth structure. Probably, recurrent caries occurs at the preparation margins and give rise to crown failure, affected by several factors, such as dental prosthesis design. The aim of this study was to investigate and compare of dental caries de...

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Autores principales:	A Akhavan Tafti, AA Moghadamnia, GH.A Jorsaraie, A Al-Havaz, SF Pachenari, S Yoosefi
Formato:	article
Lenguaje:	EN FA
Publicado:	Babol University of Medical Sciences 2010
Materias:	crowns dental prosthesis design dental caries Medicine R Medicine (General) R5-920
Acceso en línea:	https://doaj.org/article/c8336d41bebe4e8897c2f2165c98dae9
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spelling	oai:doaj.org-article:c8336d41bebe4e8897c2f2165c98dae92021-11-10T09:00:36ZHistopathologic Study of Caries at the Full and Partial Crowns Finish Line1561-41072251-7170https://doaj.org/article/c8336d41bebe4e8897c2f2165c98dae92010-10-01T00:00:00Zhttp://jbums.org/article-1-3665-en.htmlhttps://doaj.org/toc/1561-4107https://doaj.org/toc/2251-7170BACKGROUND AND OBJECTIVE: The cast crowns replace lost tooth structure. Probably, recurrent caries occurs at the preparation margins and give rise to crown failure, affected by several factors, such as dental prosthesis design. The aim of this study was to investigate and compare of dental caries depth at full and partial crown margins. METHODS: In this experimental study, eighteen sound human maxillary premolars were assigned randomly into three groups (control, partial and full), prepared based on standard preparation and crowned under a 5-Kg load. After marginal adaptation assessment, the crowns were exposed to a demineralizing solution (pH 4.5) for 10 days. Then crowns were debounded and teeth were decalcified in 5% nitric acid. Each margin was serially sectioned into a thickness of 5 µm. For depth of lesion evaluating, light microscopy (40X magnification), with 0.001 mm accuracy, was used.FINDINGS: No significant difference was observed between mean caries value of full crowns and partial crowns (289.026±250.207 µm vs. 276.688±180.513 µm). Vertical margins of partial crowns presented higher mean value of caries depth than horizontal margins of these crowns (p= 0.03). But, due to less vertical margins, only 31% of total partial crown caries was assigned to those. CONCLUSION: According to the results, although, despite to higher margins in partial crown, there is no difference in secondary caries between partial and full crowns. In conclusion, when some of axial tooth walls are intact, partial crown is more beneficial to preserve tooth structure and aesthetics.A Akhavan TaftiAA MoghadamniaGH.A JorsaraieA Al-HavazSF PachenariS YoosefiBabol University of Medical Sciencesarticlecrownsdental prosthesis designdental cariesMedicineRMedicine (General)R5-920ENFAMajallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Bābul, Vol 12, Iss 4, Pp 35-42 (2010)
institution	DOAJ
collection	DOAJ
language	EN FA
topic	crowns dental prosthesis design dental caries Medicine R Medicine (General) R5-920
spellingShingle	crowns dental prosthesis design dental caries Medicine R Medicine (General) R5-920 A Akhavan Tafti AA Moghadamnia GH.A Jorsaraie A Al-Havaz SF Pachenari S Yoosefi Histopathologic Study of Caries at the Full and Partial Crowns Finish Line
description	BACKGROUND AND OBJECTIVE: The cast crowns replace lost tooth structure. Probably, recurrent caries occurs at the preparation margins and give rise to crown failure, affected by several factors, such as dental prosthesis design. The aim of this study was to investigate and compare of dental caries depth at full and partial crown margins. METHODS: In this experimental study, eighteen sound human maxillary premolars were assigned randomly into three groups (control, partial and full), prepared based on standard preparation and crowned under a 5-Kg load. After marginal adaptation assessment, the crowns were exposed to a demineralizing solution (pH 4.5) for 10 days. Then crowns were debounded and teeth were decalcified in 5% nitric acid. Each margin was serially sectioned into a thickness of 5 µm. For depth of lesion evaluating, light microscopy (40X magnification), with 0.001 mm accuracy, was used.FINDINGS: No significant difference was observed between mean caries value of full crowns and partial crowns (289.026±250.207 µm vs. 276.688±180.513 µm). Vertical margins of partial crowns presented higher mean value of caries depth than horizontal margins of these crowns (p= 0.03). But, due to less vertical margins, only 31% of total partial crown caries was assigned to those. CONCLUSION: According to the results, although, despite to higher margins in partial crown, there is no difference in secondary caries between partial and full crowns. In conclusion, when some of axial tooth walls are intact, partial crown is more beneficial to preserve tooth structure and aesthetics.
format	article
author	A Akhavan Tafti AA Moghadamnia GH.A Jorsaraie A Al-Havaz SF Pachenari S Yoosefi
author_facet	A Akhavan Tafti AA Moghadamnia GH.A Jorsaraie A Al-Havaz SF Pachenari S Yoosefi
author_sort	A Akhavan Tafti
title	Histopathologic Study of Caries at the Full and Partial Crowns Finish Line
title_short	Histopathologic Study of Caries at the Full and Partial Crowns Finish Line
title_full	Histopathologic Study of Caries at the Full and Partial Crowns Finish Line
title_fullStr	Histopathologic Study of Caries at the Full and Partial Crowns Finish Line
title_full_unstemmed	Histopathologic Study of Caries at the Full and Partial Crowns Finish Line
title_sort	histopathologic study of caries at the full and partial crowns finish line
publisher	Babol University of Medical Sciences
publishDate	2010
url	https://doaj.org/article/c8336d41bebe4e8897c2f2165c98dae9
work_keys_str_mv	AT aakhavantafti histopathologicstudyofcariesatthefullandpartialcrownsfinishline AT aamoghadamnia histopathologicstudyofcariesatthefullandpartialcrownsfinishline AT ghajorsaraie histopathologicstudyofcariesatthefullandpartialcrownsfinishline AT aalhavaz histopathologicstudyofcariesatthefullandpartialcrownsfinishline AT sfpachenari histopathologicstudyofcariesatthefullandpartialcrownsfinishline AT syoosefi histopathologicstudyofcariesatthefullandpartialcrownsfinishline
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Histopathologic Study of Caries at the Full and Partial Crowns Finish Line

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