The effect of peracetic acid on removing calcium hydroxide from the root canals.
BACKGROUND
The goal of this study was to evaluate the efficiencies of different irrigation solutions in the removal of calcium hydroxide (CH).


METHODS
Forty-eight maxillary central incisor teeth were used. Root canals were prepared with the ProTaper system (Dentsply Maillefer, Baillagues, Switzerland). Five milliliters 2% NaOCl, 5 mL 17% EDTA, and 10 mL saline were used for final irrigation. The canals were filled with CH paste. Specimens were randomly divided into 4 experimental groups (n = 10) according to irrigation protocols. Positive and negative control groups (n = 4) were used. Group 1 used 2.5 mL 17% EDTA, group 2 used 2.5 mL 2.5% NaOCl + 2.5 mL 17% EDTA, group 3 used 2.5 mL 1% peracetic acid (PAA), and group 4 used 2.5 mL 0.5% PAA. The specimens were evaluated with scanning electron microscope analysis and scored. Kruskal-Wallis and Student Newman-Keuls post hoc tests were used for statistical analysis.


RESULTS
In the apical thirds, 1% PAA was superior to the other groups (P < .05); however, there were no significant differences among the other groups (P > .05). In the middle thirds, no significant differences were found among the groups (P > .05). In the coronal thirds, 1% PAA was superior to the other groups. There were significant differences among all the other groups (P < .05).


CONCLUSIONS
According to the findings of the present study, 1% PAA could be recommended for the removal of CH from the root canals.
Department of Restorative Dentistry and Endodontics, Faculty of Dentistry, Erciyes University, Kayseri, Turkey.
Burak
B
Sağsen
Yakup
Y
Ustün
Tuğrul
T
Aslan
Burhan Can
BC
Canakçi
D002126:Calcium Hydroxide / Q000737:chemistry / Q000627:therapeutic use*; D003786:Dental Pulp Cavity / Q000187:drug effects* / Q000648:ultrastructure; D004492:Edetic Acid / Q000737:chemistry / Q000627:therapeutic use; D004577:Electron Probe Microanalysis; D006801:Humans; D006813:Humidity; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D010463:Peracetic Acid / Q000737:chemistry / Q000627:therapeutic use*; D012387:Root Canal Filling Materials / Q000737:chemistry / Q000627:therapeutic use*; D012388:Root Canal Irrigants / Q000737:chemistry / Q000627:therapeutic use*; D018915:Root Canal Preparation / Q000295:instrumentation / Q000379:methods; D012973:Sodium Hypochlorite / Q000737:chemistry / Q000627:therapeutic use; D012995:Solubility; D013499:Surface Properties; D013696:Temperature; D007507:Therapeutic Irrigation / Q000295:instrumentation / Q000379:methods; D013997:Time Factors; D019227:Tooth Apex / Q000187:drug effects / Q000648:ultrastructure
D012387:Root Canal Filling Materials; D012388:Root Canal Irrigants; D004492:Edetic Acid; D012973:Sodium Hypochlorite; D010463:Peracetic Acid; D002126:Calcium Hydroxide