Metrologic evaluation of the surface of white MTA after the use of two endodontic irrigants.
This study examined the effects of calcium-depleting endodontic irrigants, ethylenediamine tetra-acetic acid (EDTA) and BioPure MTAD, on the dissolution, surface characteristics, and ultrastructural characteristics of white mineral trioxide aggregate (MTA). The latter was mixed in a 0.35 water-cement ratio, condensed into cylindrical wells created in Plexiglas platforms, and allowed to harden completely before initial treatment with 1.3% NaOCl and final treatments with either 17% EDTA for 5 minutes, or BioPure MTAD for 1, 3, or 5 minutes. Analysis of the mean depths of material removed using three-dimensional profilometry revealed significantly more material removed by BioPure MTAD. Although these minor depth changes (<10 microm) are unlikely to cause clinical concern, the BioPure MTAD-treated MTA surfaces exhibited higher surface roughness and with more calcium extracted when compared with EDTA treatment. Decomposition of particle-binding hydration phases by acid corrosion raises potential concern on the strength and sealing properties of MTA-repaired perforations following final irrigation by BioPure MTAD.
Smith
Jack B
JB
Department of Endodontics, School of Dentistry, Medical College of Georgia, Augusta, GA 30912, USA.
Loushine
Robert J
RJ
Weller
R Norman
RN
Rueggeberg
Frederick A
FA
Whitford
Gary M
GM
Pashley
David H
DH
Tay
Franklin R
FR
D017607:Aluminum Compounds / Q000737:chemistry*; D002118:Calcium / Q000737:chemistry; D017610:Calcium Compounds / Q000737:chemistry*; D002614:Chelating Agents / Q000737:chemistry; D019343:Citric Acid / Q000737:chemistry; D003461:Crystallography; D004318:Doxycycline / Q000737:chemistry; D004338:Drug Combinations; D004492:Edetic Acid / Q000737:chemistry; D006244:Hardness; D006801:Humans; D021621:Imaging, Three-Dimensional; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D010087:Oxides / Q000737:chemistry*; D011136:Polysorbates / Q000737:chemistry; D012388:Root Canal Irrigants / Q000737:chemistry*; D017640:Silicates / Q000737:chemistry*; D012973:Sodium Hypochlorite / Q000737:chemistry; D012995:Solubility; D013054:Spectrophotometry, Atomic; D013499:Surface Properties; D013997:Time Factors; D014867:Water / Q000737:chemistry
D017607:Aluminum Compounds; D017610:Calcium Compounds; D002614:Chelating Agents; D004338:Drug Combinations; C475043:MTAD (intracanal irrigant); D010087:Oxides; D011136:Polysorbates; D012388:Root Canal Irrigants; D017640:Silicates; C086631:mineral trioxide aggregate; D014867:Water; D019343:Citric Acid; D004492:Edetic Acid; D012973:Sodium Hypochlorite; D004318:Doxycycline; D002118:Calcium