Influence of remaining coronal structure and finish line on the fracture strength of roots restored with metallic posts
The purpose of this study was to evaluate the fracture strength of roots that were prosthetically restored with metallic posts with or without any remaining coronal structure and with different finish lines. Sixty bovine incisors were sectioned below the cementoenamel junction, endodontically treate...
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| Format: | Article |
| Language: | English |
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Sociedade Brasileira de Pesquisa Odontológica
2011-08-01
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| Series: | Brazilian Oral Research |
| Subjects: | |
| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242011000400011 |
| _version_ | 1818689606920437760 |
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| author | Bruno Carlini-Jr Doglas Cecchin Gisele Damiana da Silveira Pereira Luis Alexandre Maffei Sartini Paulillo |
| author_facet | Bruno Carlini-Jr Doglas Cecchin Gisele Damiana da Silveira Pereira Luis Alexandre Maffei Sartini Paulillo |
| author_sort | Bruno Carlini-Jr |
| collection | DOAJ |
| description | The purpose of this study was to evaluate the fracture strength of roots that were prosthetically restored with metallic posts with or without any remaining coronal structure and with different finish lines. Sixty bovine incisors were sectioned below the cementoenamel junction, endodontically treated, and randomly divided into six experimental groups (n = 10) containing teeth with or without any remaining coronal structure, and with a beveled shoulder, a bevel, or a shoulder finish line design. The metallic posts were luted with dual-cured resin cement. The cores were made with composite resin, and metal crowns were cemented with zinc phosphate cement. The specimens were subjected to a tangential compressive load (135º angle) at a crosshead speed of 0.5 mm/min until failure, using a universal testing machine. The fracture strength data were analyzed using the ANOVA and LSMeans (least square means) tests (α= 0.05). The data indicated that the teeth with 2 mm of remaining coronal structure showed the highest fracture strength values when compared with the teeth without any remaining structure (p < 0.05). As to the different finish line designs, the highest fracture strength values were obtained for the beveled shoulder, followed by the bevel and then by the shoulder designs (p < 0.05). It may be concluded that, to increase fracture strength, a beveled shoulder and 2 mm of remaining coronal structure are the ideal conditions. |
| first_indexed | 2024-12-17T12:12:47Z |
| format | Article |
| id | doaj.art-e38bd9d746b9490394498d9e17f702cd |
| institution | Directory Open Access Journal |
| issn | 1806-8324 |
| language | English |
| last_indexed | 2024-12-17T12:12:47Z |
| publishDate | 2011-08-01 |
| publisher | Sociedade Brasileira de Pesquisa Odontológica |
| record_format | Article |
| series | Brazilian Oral Research |
| spelling | doaj.art-e38bd9d746b9490394498d9e17f702cd2022-12-21T21:49:20ZengSociedade Brasileira de Pesquisa OdontológicaBrazilian Oral Research1806-83242011-08-0125434535010.1590/S1806-83242011000400011Influence of remaining coronal structure and finish line on the fracture strength of roots restored with metallic postsBruno Carlini-JrDoglas CecchinGisele Damiana da Silveira PereiraLuis Alexandre Maffei Sartini PaulilloThe purpose of this study was to evaluate the fracture strength of roots that were prosthetically restored with metallic posts with or without any remaining coronal structure and with different finish lines. Sixty bovine incisors were sectioned below the cementoenamel junction, endodontically treated, and randomly divided into six experimental groups (n = 10) containing teeth with or without any remaining coronal structure, and with a beveled shoulder, a bevel, or a shoulder finish line design. The metallic posts were luted with dual-cured resin cement. The cores were made with composite resin, and metal crowns were cemented with zinc phosphate cement. The specimens were subjected to a tangential compressive load (135º angle) at a crosshead speed of 0.5 mm/min until failure, using a universal testing machine. The fracture strength data were analyzed using the ANOVA and LSMeans (least square means) tests (α= 0.05). The data indicated that the teeth with 2 mm of remaining coronal structure showed the highest fracture strength values when compared with the teeth without any remaining structure (p < 0.05). As to the different finish line designs, the highest fracture strength values were obtained for the beveled shoulder, followed by the bevel and then by the shoulder designs (p < 0.05). It may be concluded that, to increase fracture strength, a beveled shoulder and 2 mm of remaining coronal structure are the ideal conditions.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242011000400011Dental Cavity PreparationDental Restoration FailureTooth RootPost and Core TechniqueCompressive Strength |
| spellingShingle | Bruno Carlini-Jr Doglas Cecchin Gisele Damiana da Silveira Pereira Luis Alexandre Maffei Sartini Paulillo Influence of remaining coronal structure and finish line on the fracture strength of roots restored with metallic posts Brazilian Oral Research Dental Cavity Preparation Dental Restoration Failure Tooth Root Post and Core Technique Compressive Strength |
| title | Influence of remaining coronal structure and finish line on the fracture strength of roots restored with metallic posts |
| title_full | Influence of remaining coronal structure and finish line on the fracture strength of roots restored with metallic posts |
| title_fullStr | Influence of remaining coronal structure and finish line on the fracture strength of roots restored with metallic posts |
| title_full_unstemmed | Influence of remaining coronal structure and finish line on the fracture strength of roots restored with metallic posts |
| title_short | Influence of remaining coronal structure and finish line on the fracture strength of roots restored with metallic posts |
| title_sort | influence of remaining coronal structure and finish line on the fracture strength of roots restored with metallic posts |
| topic | Dental Cavity Preparation Dental Restoration Failure Tooth Root Post and Core Technique Compressive Strength |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-83242011000400011 |
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