Effect of 17% EDTA and MTAD on intracanal smear layer removal: a scanning electron microscopic study.
The purpose of this study was to determine the effectiveness of MTAD as the final irrigant to remove the smear layer, compared with that of 17% EDTA, both following root canal irrigation with 5.25% sodium hypochlorite (NaOCl). Fifty-five extracted maxillary and mandibular single-rooted human teeth were prepared by a crown-down technique using rotary 0.04 and 0.06 taper nickel-titanium files. 5.25% sodium hypochlorite was used as the intracanal irrigant. The canals were then treated with 5 mL of one of the following solutions as final rinse: 5.25% sodium hypochlorite, 17% EDTA or MTAD. The presence or absence of smear layer in the coronal, middle and apical portion of each canal was examined with a scanning electron microscope. The results showed that MTAD is an effective final rinse solution for removing the smear layer in canals irrigated with sodium hypochlorite. When 17% EDTA was used as a final rinse, the smear layer was removed from the middle and coronal thirds of canal preparations, but it was less effective in the apical third of the canals.
Mozayeni
Mohammad Ali
MA
Department of Endodontics, Iranian Center for Endodontic Research, Shaheed Beheshti University of Medical Sciences, Dental School, Tehran, Iran.
Javaheri
Ghasem Hossein
GH
Poorroosta
Pardis
P
Ashari
Mohammad Asna
MA
Javaheri
Homan Hossein
HH
D019343:Citric Acid; D004318:Doxycycline; D004492:Edetic Acid; D006801:Humans; D008855:Microscopy, Electron, Scanning; D011136:Polysorbates; D012388:Root Canal Irrigants; D018915:Root Canal Preparation / Q000379:methods*; D016369:Smear Layer; D012973:Sodium Hypochlorite
C475043:MTAD (intracanal irrigant); D011136:Polysorbates; D012388:Root Canal Irrigants; D019343:Citric Acid; D004492:Edetic Acid; D012973:Sodium Hypochlorite; D004318:Doxycycline