Efficacy of XP-endo finisher files in the removal of calcium hydroxide paste from artificial standardized grooves in the apical third of oval root canals.
OBJECTIVE
To compare the efficacy of the XP-endo finisher file (XP) (FKG Dentaire, La Chaux de Fonds, Switzerland) to that of passive ultrasonic irrigation (PUI) and conventional syringe and needle irrigation (SNI) in the removal of calcium hydroxide paste from an artificial standardized groove in the apical third of root canals.


METHODS
The root canals of 68 mandibular incisors with single oval canals were prepared using Mtwo instruments (VDW GmbH, Munich, Germany) up to size 40, .04 taper. Each tooth was split longitudinally, and in one half of the root, a standardized groove was prepared in the apical part of the specimen. The grooves were filled with Ca(OH)2, and the root halves were reassembled. The roots were randomly divided into two control groups (n = 4) and three experimental groups (n = 20) according to the Ca(OH)2methods used: XP, PUI and SNI. The amount of remaining medicament was evaluated under X25 magnification using a 4-grade scoring system. Kappa values were calculated for intra- and interobserver agreement evaluation. The differences in the Ca(OH)2scores amongst the different groups were analysed using the Kruskal-Wallis test.


RESULTS
None of the tested methods could completely clean the Ca(OH)2from the artificial standardized groove in the apical third of the root canals. XP and PUI removed significantly more Ca(OH)2than SNI (P < 0.001), with no significant differences between them (P = 0.238).


CONCLUSIONS
XP and PUI were more effective in removing Ca(OH)2from artificial standardized grooves in the apical third of root canals than SNI.
Department of Endodontology, The Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.
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R
Wigler
Department of Endodontology, The Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.
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R
Dvir
Department of Endodontology, The Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.
A
A
Weisman
Department of Oral Rehabilitation, The Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.
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S
Matalon
Department of Endodontology, The Goldschleger School of Dental Medicine, Tel Aviv University, Tel Aviv, Israel.
A
A
Kfir
D002126:Calcium Hydroxide / Q000737:chemistry*; D003762:Dental Instruments; D003786:Dental Pulp Cavity / Q000648:ultrastructure*; D004867:Equipment Design; D006801:Humans; D066298:In Vitro Techniques; D007180:Incisor; D012388:Root Canal Irrigants / Q000737:chemistry*; D013499:Surface Properties; D013594:Syringes; D007507:Therapeutic Irrigation / Q000295:instrumentation*; D014465:Ultrasonics
D012388:Root Canal Irrigants; D002126:Calcium Hydroxide
XP-endo finisher file; artificial groove; calcium hydroxide removal; oval canals; passive ultrasonic irrigation