%0 Journal Article
%T Bond Strength of Repaired Composite Resin Restorations
%A Rodrigo M芍ximo de ARA迆JO
%A Caio Gorgulho ZANET
%A Maria Am谷lia M芍ximo de ARA迆JO
%A Rebeca Di NICOL車
%J Pesquisa Brasileira em Odontopediatria e Cl赤nica Integrada
%D 2007
%I Associa??o de Apoio 角 Pesquisa em Sa迆de Bucal (APESB)
%X Purpose: To evaluate the bond strength of direct composite resins and composite repairs, using 3 different commercial brands - GI: Palfique Estelite 車 (Tokuyama), GII: Filtek Z350 (3M/ESPE) and GIII: Te Econon (Ivoclar/Vivadent) - and the use of AdperTM Single Bond 2 (3M/ESPE) adhesive system at the base/repair interface. Method: Thirty conic bases (5 mm x 5 mm x 3 mm) of each commercial brand of composite resin were fabricated. All bases of each group were submitted to a thermocycling regimen of 20,000 cycles (5oC to 55oC ㊣ 2oC, for 30 s). The bases of each group were randomly assigned to 3 sub-groups, in which a combination of the commercial brands was performed for the repairs. The specimens were stored in distilled water at 37∼C during 7 days and were thereafter tested in tensile strength in a universal testing machine (EMIC - MEM 2000) with 500 kgf load cell running at a crosshead speed of 1.0 mm/min until fracture. Data in MPa were submitted to ANOVA and Tukey＊s test (5%).Results: The following results were found: GI: Palfique Estelite 車 (11.22㊣4.00 MPa), Te Econom (12.03㊣3.47 MPa) and Filtek Z350 (10.66㊣2.89 MPa); GII: Palfique Estelite 車 (8.88㊣2.04 MPa), Te Econom (7.77㊣1.64 MPa) and Filtek Z350 (10.50㊣6.14 MPa); and GIII: Palfique Estelite 車 (8.41㊣2.50 MPa), Te Econom (12.33㊣3.18 MPa) and Z350 (11.73㊣3.54 MPa).Conclusion: The bond strengths at the interface of the different composite resins submitted to repair were statistically similar regardless of the commercial brand.
%K Composite resins
%K Tensile strength
%K Laboratory tests.
%U http://www.uepb.edu.br/eduep/pboci/pdf/Artigo8v72.pdf