Effect of the interfacial area measurement parameters on the push-out strength between fiber post and dentin

Autor(es)

Bergoli, Cesar Dalmolin ^[1] ; da Costa Lima, Julia Magalhaes ^[1] ; de Melo, Renata Marques ^[1] ; Bottino, Marco Antonio ^[2] ; Valandro, Luiz Felipe ^[3]

Afiliação do(s) autor(es)

^[1] Sao Paulo State Univ UNESP, Sao Jose Campos Dent Sch, BR-12245000 Sao Paulo - Brazil

^[2] Sao Paulo State Univ UNESP, Sao Jose Campos Dent Sch, Dept Dent Mat & Prosthodont, BR-12245000 Sao Paulo - Brazil

^[3] Univ Fed Santa Maria, Fac Odontol, Prosthodont Unit, BR-97015372 Santa Maria, RS - Brazil

• Tipo de documento: Artigo Científico
• Fonte: INTERNATIONAL JOURNAL OF ADHESION AND ADHESIVES; v. 50, p. 7-10, APR 2014.
• Citações Web of Science: 2

Resumo

Purpose: To verify the influence of different instruments and operators on the bonding interfacial area and on the push-out bond strength values. Material and methods: Fifteen anterior human teeth (n=15) were selected, cleaned and standardized to 15 mm length. Root canals were prepared in 12 mm and the fiber posts were cemented using the RelyX U-100 cement. Three slices were obtained per tooth (N=45) and submitted to the push-out bond strength test. The bonding interfacial area (mm(2)) of each specimen was calculated based on the disc slice dimensions: coronal and apical diameter and height. The bonding area of each specimen was used to calculate the bond strength (Mpa). The dimensions were analyzed by different operators, using two instruments: G1 - Operator A with a digital caliper; G2 - Operator A with a stereomicroscope; G3 - Operator B with a digital caliper; G4 - Operator B with a digital stereomicroscope; G5 - Operator C with a digital caliper; G6 - Operator C with a stereomicroscope. The mean area was submitted to inter-operator and intra-operator analyses, while the mean area and mean of bond strength were submitted to the 2-way ANOVA with repeated measures and the Tukey test (alpha=0.05). Results: The inter-operator kappa was 0.83 to the digital caliper and 0.91 to the stereomicroscope, while the intra-operator kappa was 0.76. The operator and the measurement instrument influenced the interfacial bonding area (p=0.000 and p=0.001) and the push-out bond strength values (p=0.000 and p=0.000, respectively) of the disc slices. Conclusion: The final push-out bond strength values are influenced by the measuring instrument and by the measurer operator. (C) 2014 Published by Elsevier Ltd. (AU)

• Processo FAPESP: 11/09897-8 - Avaliação de fatores relacionados ao teste de push-out entre pino de fibra e dentina intrarradicular
• Beneficiário: Luiz Felipe Valandro
• Modalidade de apoio: Auxílio à Pesquisa - Regular