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Revista clínica de periodoncia, implantología y rehabilitación oral

On-line version ISSN 0719-0107

Abstract

MONSALVES BRAVO, Silvia Isabel; TERRAZAS SOTO, Pedro; TORO URBINA, Georgina  and  BADER MATTAR, Marcelo. Evaluation of microleakage and strength adhesive of composite resin restorations with total etch adhesive system in primary and permanent teeth. Rev. Clin. Periodoncia Implantol. Rehabil. Oral [online]. 2014, vol.7, n.3, pp.149-156. ISSN 0719-0107.  http://dx.doi.org/10.1016/j.piro.2014.09.001.

The present study evaluated the degree of marginal seal and adhesive resistance of composite resin restorations prepared with an etch and rinse adhesive system in primary and definitive dentition. To perform both tests, 20 primary pieces and 20 permanent pieces were used. In the shear strength resistance, the teeth were sectioned longitudinally and were adhered to composite resin cylinder, using the etch and rinse technique for both dentitions. They were then tested on a Tinius Olsen universal testing machine, applying a shear force of 200 kg and a head speed of 0.2 cm/min. For the margin seal test, a class V cavity preparation of standardised vestibular/palatine was made. The composite resin restorations were made with the etch and rinse technique and were subjected to thermocycling with 2% methylene blue. Later, they were cut and observed using a stereoscopic optical microscope with loop magnification to measure the percentage of microfiltration obtained. The mean value of the adhesive resistance to shearing for primary dentition was 8.49 Mpa, and 9.52 Mpa for permanent teeth, with no statistically significant differences being found between the groups studied. In the test on the degree of margin seal the percentage microfiltration was measured, with no statistically significant differences being found either. The results showed that both tissues are equally susceptible to being treated adhesively using the hybrid technique.

Keywords : Primary teeth; Adhesive strength; Total-etch adhesive system; Microleakage; Shear force.

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