00730naa a2200241 a 450000100080000000500110000800800410001910000230006024500960008326000090017965000160018865000150020465300130021965300300023265300270026265300230028965300130031270000200032570000240034570000230036970000150039277300810040718770352011-09-13 2010 bl uuuu u00u1 u #d1 aSILVEIRA, L. F. M. aCrown-down preflaring in the determination of the first apical file.h[electronic resource] c2010 aendodontics amicroscopy aElectron aMolar/anatomy & histology aRoot canal preparation aRoot canal therapy aScanning1 aSILVEIRA, C. F.1 aCASTRO, L. A. S. de1 aCÉSAR NETO, J. B.1 aMARTOS, J. tBrazilian Oral Research, São Paulogv. 24, n. 2, p. 153-157, apr-jun. 2010.