Portal de Periódicos da CAPES

Bioactivity of EndoSequence Root Repair Material and Bioaggregate

2012; Wiley; Volume: 45; Issue: 12 Linguagem: Inglês

10.1111/j.1365-2591.2012.02083.x

1365-2591

Noushin Shokouhinejad, M. H. Nekoofar, Hasan Razmi, S M Sajadi, Thomas E. Davies, Mohammad Ali Saghiri, Hedayat Gorjestani, P. M. H. Dummer,

Dental materials and restorations

Abstract Aim To evaluate the bioactivity of Bioaggregate ( BA ), EndoSequence Root Repair Material ( ERRM ), and white ProRoot Mineral trioxide aggregate ( MTA ). Methodology Sixty horizontal root sections with standardized canal spaces were divided randomly into 3 groups ( n = 20) and filled with white ProRoot MTA (groups 1 and 2), BA (groups 3 and 4) or ERRM putty (groups 5 and 6). The specimens of groups 1, 3 and 5 (each of 10) were immersed in phosphate‐buffered saline ( PBS ) for 1 week and those of groups 2, 4 and 6 (each of 10) for 2 months. After the experimental periods, the specimens were processed for scanning electron microscopy ( SEM ) observations. Precipitation of apatite crystals on the surfaces of the cements and/or at the dentine–cement interface was evaluated and analysed elementally by energy dispersive X‐ray ( EDX ) instrument. Results Analysis of specimens revealed various surface morphologies that were dependent on the material and immersion time in PBS . The formation of precipitates was observed on the surfaces of all materials at 1 week, which increased substantially over time. After 2 months, the surface of the cements was changed dramatically and consisted of a substantially greater amount of apatite aggregates. Interfacial layers in some areas of the dentine–cement interface were found only following 2 months of immersion. Precipitates on MTA revealed high peaks of Ca, Si and O after 1 week of immersion; after 2 months, high peaks of Ca, P and O were present. Precipitates on BA and ERRM displayed high Ca, P O peaks after both 1 week and 2 months. Conclusion Exposure of MTA , BA and ERRM to PBS resulted in precipitation of apatite crystalline structures that increased over time. This suggests that the tested materials are bioactive.