In vitro fracture resistance of glass-fiber and cast metal posts with different designs
PURPOSE: To evaluate the in vitro fracture resistance of roots with glass-fiber and metal dowels with different designs. METHODS: Fifty-endodontically treated maxillary central incisors were embedded in acrylic resin. Ten of them received only the coronary preparation, and the remaining forty were embedded (except for 4mm of the cervical area) after removing the clinical crowns. Specimens were divided into five groups (n=10): control (teeth with only coronary preparation), cylindrical cast dowel, conical cast dowel, cylindrical glass-fiber dowel and conical glass-fiber dowel. Specimens were subjected to an increasing compressive load (N) until fracture. RESULTS: ANOVA indicated significant difference (P<.05) among the groups, and the Tukey-Kramer´s test identified these differences. The control group (867±243 N) presented the highest values and was statistically similar to cylindrical glass-fiber dowel group (711±180 N). There is no significant difference among the metal dowel cylindrical (435±245 N) or conical (585±164 N) group and conical glass-fiber dowel (453±112 N). Cylindrical glass-fiber dowel (711±180 N) and conical cast dowel and core (585±164 N) groups had intermediate values and did not differ from each other. CONCLUSIONS: Cylindrical glass fiber dowels represent a viable alternative to the cast-metal dowel cylindrical or conical. Cylindrical glass fiber dowels also increase endodontically treated incisors' resistance to fracture.
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Pontifícia Universidade Católica do Rio Grande do Sul
2012
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oai:scielo:S1980-652320120001000102012-05-24In vitro fracture resistance of glass-fiber and cast metal posts with different designsPasqualin,Fábio HenriqueGiovani,Alessandro RogérioSousa Neto,Manoel Damião dePaulino,Silvana MariaVansan,Luiz Pascoal Fiber dowel metallic dowel dowel failure resistance to fracture PURPOSE: To evaluate the in vitro fracture resistance of roots with glass-fiber and metal dowels with different designs. METHODS: Fifty-endodontically treated maxillary central incisors were embedded in acrylic resin. Ten of them received only the coronary preparation, and the remaining forty were embedded (except for 4mm of the cervical area) after removing the clinical crowns. Specimens were divided into five groups (n=10): control (teeth with only coronary preparation), cylindrical cast dowel, conical cast dowel, cylindrical glass-fiber dowel and conical glass-fiber dowel. Specimens were subjected to an increasing compressive load (N) until fracture. RESULTS: ANOVA indicated significant difference (P<.05) among the groups, and the Tukey-Kramer´s test identified these differences. The control group (867±243 N) presented the highest values and was statistically similar to cylindrical glass-fiber dowel group (711±180 N). There is no significant difference among the metal dowel cylindrical (435±245 N) or conical (585±164 N) group and conical glass-fiber dowel (453±112 N). Cylindrical glass-fiber dowel (711±180 N) and conical cast dowel and core (585±164 N) groups had intermediate values and did not differ from each other. CONCLUSIONS: Cylindrical glass fiber dowels represent a viable alternative to the cast-metal dowel cylindrical or conical. Cylindrical glass fiber dowels also increase endodontically treated incisors' resistance to fracture.info:eu-repo/semantics/openAccessPontifícia Universidade Católica do Rio Grande do SulRevista Odonto Ciência v.27 n.1 20122012-01-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-65232012000100010en10.1590/S1980-65232012000100010 |
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Pasqualin,Fábio Henrique Giovani,Alessandro Rogério Sousa Neto,Manoel Damião de Paulino,Silvana Maria Vansan,Luiz Pascoal |
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Pasqualin,Fábio Henrique Giovani,Alessandro Rogério Sousa Neto,Manoel Damião de Paulino,Silvana Maria Vansan,Luiz Pascoal In vitro fracture resistance of glass-fiber and cast metal posts with different designs |
author_facet |
Pasqualin,Fábio Henrique Giovani,Alessandro Rogério Sousa Neto,Manoel Damião de Paulino,Silvana Maria Vansan,Luiz Pascoal |
author_sort |
Pasqualin,Fábio Henrique |
title |
In vitro fracture resistance of glass-fiber and cast metal posts with different designs |
title_short |
In vitro fracture resistance of glass-fiber and cast metal posts with different designs |
title_full |
In vitro fracture resistance of glass-fiber and cast metal posts with different designs |
title_fullStr |
In vitro fracture resistance of glass-fiber and cast metal posts with different designs |
title_full_unstemmed |
In vitro fracture resistance of glass-fiber and cast metal posts with different designs |
title_sort |
in vitro fracture resistance of glass-fiber and cast metal posts with different designs |
description |
PURPOSE: To evaluate the in vitro fracture resistance of roots with glass-fiber and metal dowels with different designs. METHODS: Fifty-endodontically treated maxillary central incisors were embedded in acrylic resin. Ten of them received only the coronary preparation, and the remaining forty were embedded (except for 4mm of the cervical area) after removing the clinical crowns. Specimens were divided into five groups (n=10): control (teeth with only coronary preparation), cylindrical cast dowel, conical cast dowel, cylindrical glass-fiber dowel and conical glass-fiber dowel. Specimens were subjected to an increasing compressive load (N) until fracture. RESULTS: ANOVA indicated significant difference (P<.05) among the groups, and the Tukey-Kramer´s test identified these differences. The control group (867±243 N) presented the highest values and was statistically similar to cylindrical glass-fiber dowel group (711±180 N). There is no significant difference among the metal dowel cylindrical (435±245 N) or conical (585±164 N) group and conical glass-fiber dowel (453±112 N). Cylindrical glass-fiber dowel (711±180 N) and conical cast dowel and core (585±164 N) groups had intermediate values and did not differ from each other. CONCLUSIONS: Cylindrical glass fiber dowels represent a viable alternative to the cast-metal dowel cylindrical or conical. Cylindrical glass fiber dowels also increase endodontically treated incisors' resistance to fracture. |
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Pontifícia Universidade Católica do Rio Grande do Sul |
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2012 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-65232012000100010 |
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