Fracture resistance of weakened teeth restored with condensable resin with and without cusp coverage
OBJECTIVES: This in vitro study evaluated the fracture resistance of weakened human premolars (MOD cavity preparation and pulp chamber roof removal) restored with condensable resin composite with and without cusp coverage. MATERIAL AND METHODS: Thirty human maxillary premolars were divided into three groups: Group A (control), sound teeth; Group B, wide MOD cavities prepared and the pulp chamber roof removed and restored with resin composite without cusp coverage; Group C, same as Group B with 2.0 mm of buccal and palatal cusps reduced and restored with the same resin. The teeth were included in metal rings with self-curing acrylic resin, stored in water for 24 h and thereafter subjected to a compressive axial load in a universal testing machine at 0.5 mm/min. RESULTS: The mean fracture resistance values ± standart deviation (kgf) were: group A: 151.40 ± 55.32, group B: 60.54 ± 12.61, group C: 141.90 ± 30.82. Statistically significant differences were found only between Group B and the other groups (p<0.05). The condensable resin restoration of weakened human premolars with cusp coverage significantly increased the fracture resistance of the teeth as compared to teeth restored without cusp coverage. CONCLUSION: The results showed that cusp coverage with condensable resin might be a safe option for restoring weakened endodontically treated teeth.
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Faculdade De Odontologia De Bauru - USP
2009
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oai:scielo:S1678-775720090003000062009-05-18Fracture resistance of weakened teeth restored with condensable resin with and without cusp coverageMondelli,Rafael Francisco LiaIshikiriama,Sérgio KiyoshiOliveira Filho,Otávio deMondelli,José Composite resins Nonvital tooth Compressive strength OBJECTIVES: This in vitro study evaluated the fracture resistance of weakened human premolars (MOD cavity preparation and pulp chamber roof removal) restored with condensable resin composite with and without cusp coverage. MATERIAL AND METHODS: Thirty human maxillary premolars were divided into three groups: Group A (control), sound teeth; Group B, wide MOD cavities prepared and the pulp chamber roof removed and restored with resin composite without cusp coverage; Group C, same as Group B with 2.0 mm of buccal and palatal cusps reduced and restored with the same resin. The teeth were included in metal rings with self-curing acrylic resin, stored in water for 24 h and thereafter subjected to a compressive axial load in a universal testing machine at 0.5 mm/min. RESULTS: The mean fracture resistance values ± standart deviation (kgf) were: group A: 151.40 ± 55.32, group B: 60.54 ± 12.61, group C: 141.90 ± 30.82. Statistically significant differences were found only between Group B and the other groups (p<0.05). The condensable resin restoration of weakened human premolars with cusp coverage significantly increased the fracture resistance of the teeth as compared to teeth restored without cusp coverage. CONCLUSION: The results showed that cusp coverage with condensable resin might be a safe option for restoring weakened endodontically treated teeth.info:eu-repo/semantics/openAccessFaculdade De Odontologia De Bauru - USPJournal of Applied Oral Science v.17 n.3 20092009-06-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572009000300006en10.1590/S1678-77572009000300006 |
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Mondelli,Rafael Francisco Lia Ishikiriama,Sérgio Kiyoshi Oliveira Filho,Otávio de Mondelli,José |
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Mondelli,Rafael Francisco Lia Ishikiriama,Sérgio Kiyoshi Oliveira Filho,Otávio de Mondelli,José Fracture resistance of weakened teeth restored with condensable resin with and without cusp coverage |
author_facet |
Mondelli,Rafael Francisco Lia Ishikiriama,Sérgio Kiyoshi Oliveira Filho,Otávio de Mondelli,José |
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Mondelli,Rafael Francisco Lia |
title |
Fracture resistance of weakened teeth restored with condensable resin with and without cusp coverage |
title_short |
Fracture resistance of weakened teeth restored with condensable resin with and without cusp coverage |
title_full |
Fracture resistance of weakened teeth restored with condensable resin with and without cusp coverage |
title_fullStr |
Fracture resistance of weakened teeth restored with condensable resin with and without cusp coverage |
title_full_unstemmed |
Fracture resistance of weakened teeth restored with condensable resin with and without cusp coverage |
title_sort |
fracture resistance of weakened teeth restored with condensable resin with and without cusp coverage |
description |
OBJECTIVES: This in vitro study evaluated the fracture resistance of weakened human premolars (MOD cavity preparation and pulp chamber roof removal) restored with condensable resin composite with and without cusp coverage. MATERIAL AND METHODS: Thirty human maxillary premolars were divided into three groups: Group A (control), sound teeth; Group B, wide MOD cavities prepared and the pulp chamber roof removed and restored with resin composite without cusp coverage; Group C, same as Group B with 2.0 mm of buccal and palatal cusps reduced and restored with the same resin. The teeth were included in metal rings with self-curing acrylic resin, stored in water for 24 h and thereafter subjected to a compressive axial load in a universal testing machine at 0.5 mm/min. RESULTS: The mean fracture resistance values ± standart deviation (kgf) were: group A: 151.40 ± 55.32, group B: 60.54 ± 12.61, group C: 141.90 ± 30.82. Statistically significant differences were found only between Group B and the other groups (p<0.05). The condensable resin restoration of weakened human premolars with cusp coverage significantly increased the fracture resistance of the teeth as compared to teeth restored without cusp coverage. CONCLUSION: The results showed that cusp coverage with condensable resin might be a safe option for restoring weakened endodontically treated teeth. |
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Faculdade De Odontologia De Bauru - USP |
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2009 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1678-77572009000300006 |
work_keys_str_mv |
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