Self-etching primer: the effect of contamination with a mixture of saliva and blood on bonding metallic brackets

Bernardo Urbanetto Peres, Felipe Weidenbach Degrazzia, Renésio Armindo Ghers, Fabíola Rossato Arrais, Vilmar Antonio Ferrazzo

Abstract


PURPOSE: To evaluate the shear bond strength (SBS) of metallic brackets bonded with Transbond Plus Self-Etching Primer (TPSEP) and Transbond Plus Color Change (TPCC) under contamination with a mixture of saliva and blood. MATERIALS AND METHODS: 42 human premolars were randomly divided into 2 groups (n=21). Group 1 (G1) were bonded under no contamination, and Group 2 (G2) was contaminated with saliva/blood before bonding. Both groups were bonded according to the manufacturer’s instructions and were cleaned with pumice before bonding. The shear bond strength (SBS) tests were performed after 24 hours in distilled water at 37°C and after thermocycling. RESULTS: Both groups showed a homogeneous distribution in the Levene’s test (p>0.05). The main shear bond strength value of G1 was 8.89 MPa with a standard deviation of 2.27; the value for G2 was 6.00 MPa with a standard deviation of 2.62 MPa. There was a significant difference between G1 and G2 (t-student test p<0.05). IRA scores indicated that the main value was IRA 0, and no significant difference (α=0.05) was found between the groups. CONCLUSION: Contamination of blood mixed with saliva significantly decreases the shear bond strength, but even so, the performance is clinically acceptable.

Keywords


Adhesives; Shear strength; Orthodontic brackets

Full Text:

PDF


DOI: http://dx.doi.org/10.19177/jrd.v1e22013175-183

Refbacks

  • There are currently no refbacks.


Journal of Research in Dentistry, University of Southern of Santa Catarina, Santa Catarina, ISSN 2317-5907

Licença Creative Commons
This work is licensed under a Creative Commons Attribution Creative Commons - Atribuição 4.0 Internacional.