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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| Format: | Article |
| Language: | English |
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Babol University of Medical Sciences
2010-10-01
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| Series: | Majallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Bābul |
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| Online Access: | http://jbums.org/article-1-3665-en.html |
| _version_ | 1818752103323009024 |
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| 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 |
| collection | DOAJ |
| 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. |
| first_indexed | 2024-12-18T04:46:08Z |
| format | Article |
| id | doaj.art-c8336d41bebe4e8897c2f2165c98dae9 |
| institution | Directory Open Access Journal |
| issn | 1561-4107 2251-7170 |
| language | English |
| last_indexed | 2024-12-18T04:46:08Z |
| publishDate | 2010-10-01 |
| publisher | Babol University of Medical Sciences |
| record_format | Article |
| series | Majallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Bābul |
| spelling | doaj.art-c8336d41bebe4e8897c2f2165c98dae92022-12-21T21:20:35ZengBabol University of Medical SciencesMajallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Bābul1561-41072251-71702010-10-011243542Histopathologic Study of Caries at the Full and Partial Crowns Finish LineA Akhavan Tafti0AA Moghadamnia1GH.A Jorsaraie2A Al-Havaz3SF Pachenari4S Yoosefi5 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.http://jbums.org/article-1-3665-en.htmlcrownsdental prosthesis designdental caries |
| spellingShingle | 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 Majallah-i Dānishgāh-i ̒Ulūm-i Pizishkī-i Bābul crowns dental prosthesis design dental caries |
| title | 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_short | 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 |
| topic | crowns dental prosthesis design dental caries |
| url | http://jbums.org/article-1-3665-en.html |
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