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Decalcifying effects of antimicrobial irrigating solutions on root canal dentin
Carmen-María Ferrer-Luque1, Mercedes Perez-Heredia, Pilar Baca
1Department of Stomatology, School of Dentistry, Campus de Cartuja, Colegio Máximo s/n, E-18071, Granada, Spain. cferrer@ugr.es
Objective:
The aim of this study was to determine the decalcifying efficacy of 7% maleic acid (MA), 2% chlorhexidine (CHX), and combinations of 7% MA + 0.2% cetrimide (CTR) and 2% CHX + 0.2% CTR, in four time periods.
Study Design:
Four specimens per tooth were obtained from a 2-mm thick slice of the cervical third of the root of ten human incisors. At 1, 2, 3 and 5 minutes of immersion, the concentrations of Ca2+ were measured by atomic absorption spectrophotometry. The results were analyzed using the Mann-Whitney U-test.
Results:
Statistically significant differences were seen for the extracted calcium in all time periods. The amount of calcium extracted by 7% MA was the highest at all four immersion times, followed by 7% MA + 0.2% CTR. Two percent CHX and its combination with 0.2% CTR extracted virtually no calcium.
Conclusions:
The decalcifying capacity of 7% MA and 2% CHX diminished when combined with 0.2% CTR.
