A Quantitative Assessment of Efficacy of Various Calcium Hydroxide Removal Techniques

Kenee, David M.; Allemang, John D.; Johnson, James D.; Hellstein, John W.; Nichol, Brian K.

doi:10.1016/j.joen.2005.10.065

Cited by 140 publications

(238 citation statements)

References 24 publications

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“…This is in agreement with results of the previous studies, which showed the presence of CH debris on the root canal walls, regardless of the removal technique (9,11,13,14).…”

Section: Discussionsupporting

confidence: 93%

“…Studies have showed that irrigation with sodium hypochlorite alone is not efficient to remove CH medication (11,12). Alternatively, irrigation with EDTA and recapitulation of the instrumentation with the last file used in the apical preparation (12,13) of rotary instrument or ultrasonic points in conjunction with irrigation has been recommended (11,14).…”

Section: Calcium Hydroxide Intracanal Dressing Removal With Differentmentioning

confidence: 99%

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Calcium hydroxide intracanal dressing removal with different rotary instruments and irrigating solutions: a scanning electron microscopy study

et al. 2010

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This study evaluated the efficacy of 2 types of rotary instruments employed in association with sodium hypochlorite (NaOCl) or EDTA in removing calcium hydroxide (CH) residues from root canals dentin walls. Forty-two mandibular human incisors were instrumented with the ProTaper System up to F2 instrument, irrigated with 2.5% NaOCl followed by 17% EDTA and filled with a CH intracanal dressing. After 7 days, the CH dressing was removed using 4 techniques: NiTi rotary instrument size 25, 0.06 taper (K3 Endo) and irrigation with 17% EDTA (Group 1), NiTi rotary F1 instrument (ProTaper) and irrigation with 17% EDTA (Group 2), NiTi rotary instrument size 25, 0.06 taper and irrigation with 2.5% NaOCl (Group 3) and NiTi rotary F1 instrument and irrigation with 2.5% NaOCl (Group 4). Two roots without intracanal dressing were used as negative controls. Teeth were evaluated by scanning electron microscopy, in the cervical and apical canal thirds. None of the techniques removed the CH dressing completely. In the apical and cervical thirds, F1 instrument was better than instrument size 25, 0.06 taper in removing CH residues (p<0.05), regardless of the final irrigating solution. No difference was found between the irrigating solutions in the groups of F1 instrument and of instrument size 25, 0.06 taper (p>0.05). The negative controls had no CH residues on the dentin walls. In conclusion, the ProTaper F1 instrument was better than K3 Endo instrument size 25, 0.06 taper in the removal of CH intracanal medication, regardless of irrigating solution used.

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“…This is in agreement with results of the previous studies, which showed the presence of CH debris on the root canal walls, regardless of the removal technique (9,11,13,14).…”

Section: Discussionsupporting

confidence: 93%

Section: Calcium Hydroxide Intracanal Dressing Removal With Differentmentioning

confidence: 99%

Calcium hydroxide intracanal dressing removal with different rotary instruments and irrigating solutions: a scanning electron microscopy study

et al. 2010

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“…Normalmente, o método mais utilizado é a combinação de um instrumento manual com a irrigação, realizada com o auxílio de seringa e pontas de irrigação, tendo como soluções irrigadoras o hipoclorito de sódio (NaOCl) e o ácido etilenodiaminotetracético (EDTA) 13,14 . Entretanto, segundo alguns autores, nenhuma técnica é capaz de remover completamente o Ca(OH) 2 do interior do sistema de canais radiculares 9,[13][14][15][16][17][18] .…”

Section: Introdução O Hidróxido De Cálcio [Ca(oh)unclassified

Eficácia da irrigação ultrassônica passiva na remoção de hidróxido de cálcio

Zart

Michelon

Zanatta

et al. 2014

Rev. odontol. UNESP

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ResumoIntrodução: Remanescentes de Hidróxido de Cálcio [Ca(OH) 2 ] podem interferir na qualidade da obturação endodôntica. Objetivo: Avaliar a eficácia da Irrigação Ultrassônica Passiva (IUP) associada à técnica convencional na remoção de medicação intracanal à base de Ca(OH) 2 . Metodologia: Trinta dentes humanos anteriores monorradiculares foram usados. Os canais radiculares foram preparados com instrumentos manuais tipo K e preenchidos com medicação intracanal à base de Ca(OH) 2 , contendo PMCC e propilenoglicol. Após sete dias, a pasta de Ca(OH) 2 foi removida de todos os canais radiculares com um instrumento manual e irrigação de NaOCl 1% com seringa. Os espécimes foram randomizados em dois grupos (n=12) de acordo com a irrigação final: Irrigação Manual -agitação manual de EDTA 17 % e irrigação de NaOCl 1%; IUP -agitação ultrassônica de NaOCl 1% (três ativações de 20s) seguida da ativação de EDTA 17% por 1 min. O Grupo Controle (n=6) não recebeu medicação intracanal. Todos os espécimes foram clivados e a quantidade de Ca(OH) 2 remanescente foi calculada com o auxílio do estereomicroscrópio (20×). Os testes Kruskall-Wallis e Wilcoxon foram utilizados para avaliar a porcentagem de Ca(OH) 2 remanescente. Resultado: O grupo da IUP apresentou, estatisticamente, as menores porcentagens de Ca(OH) 2 remanescente, quando comparado ao grupo da Irrigação Manual, independentemente dos terços analisados (P < 0,05). O terço apical apresentou a maior quantidade de medicação residual, em ambos os grupos (P < 0,05). Conclusão: A associação da IUP com a técnica convencional demonstrou ser mais eficiente na remoção de medicação intracanal à base de Ca(OH) 2 do que a combinação da Irrigação Manual com a técnica convencional.Descritores: Hidróxido de cálcio; ultrassom; irrigação. AbstractIntroduction: Remnants of calcium hydroxide (Ca(OH) 2 ) can interfere in the quality of endodontic treatment. Aim: Evaluate the efficacy of Passive Ultrasonic Irrigation (PUI) associated with the conventional technique in removing intracanal medication Ca(OH) 2 -based. Methodology: Thirty monoradiculares anterior human teeth were used. The root canals were prepared with manual instruments type K and filled with intracanal medication Ca(OH) 2 -based containing CMCP and propylene glycol. After 7 days, Ca(OH) 2 was removed of all root canal with a manual instrument and irrigation of the 1% NaOCl with syringe. The specimens were randomly divided into two groups (n=12) according to the final irrigation: Manual Irrigation -manual agitation of 17% EDTA and 1% NaOCl irrigation; PUI -ultrasonic agitation of NaOCl 1% (3 activations of 20s) followed by activation of 17% EDTA for 1 min. The control group (n=6) received no medication. All the specimens were cleaved and the amount of Ca(OH) 2 remaining was calculated with the auxiliary of estereomicroscrópio (20×). Kruskall-Wallis tests and Wilcoxon tests were used to evaluate the percentage of Ca(OH) 2 remaining. Result: The group of PUI showed statistically the lowers percentages of Ca(OH) 2 when compared ...

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“…11,12 Several techniques have been proposed to remove the calcium hydroxide dressing from the root canal system, including the use of endodontic hand files, 13 sonic activation, 14 passive ultrasonic irrigation, 6,15 the CanalBrush System 6 and nickel-titanium rotary instruments. 16,17 Removal of the dressing using hand files, with or without an irrigating solution, may be inefficient and tedious, 6 whereas the use of NiTi rotary instruments may enhance the removal procedure when compared to the techniques Declaration of Interests: The authors certify that they have no commercial or associative interest that represents a conflict of interest in connection with the manuscript. using hand files.…”

Section: Introductionmentioning

confidence: 99%

Efficacy of NiTi rotary instruments in removing calcium hydroxide dressing residues from root canal walls

et al. 2012

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The aim of this study was to evaluate the efficacy of three rotary instrument systems (K3, ProTaper and Twisted File) in removing calcium hydroxide residues from root canal walls. Thirty-four human mandibular incisors were instrumented with the ProTaper System up to the F2 instrument, irrigated with 2.5% NaOCl followed by 17% EDTA, and filled with a calcium hydroxide intracanal dressing. After 7 days, the calcium hydroxide dressing was removed using the following rotary instruments: G1 -NiTi size 25, 0.06 taper, of the K3 System; G2 -NiTi F2, of the ProTaper System; or G3 -NiTi size 25, 0.06 taper, of the Twisted File System. The teeth were longitudinally grooved on the buccal and lingual root surfaces, split along their long axis, and their apical and cervical canal thirds were evaluated by SEM (×1000). The images were scored and the data were statistically analyzed using the Kruskall Wallis test. None of the instruments removed the calcium hydroxide dressing completely, either in the apical or cervical thirds, and no significant differences were observed among the rotary instruments tested (p > 0.05).

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A Quantitative Assessment of Efficacy of Various Calcium Hydroxide Removal Techniques

Cited by 140 publications

References 24 publications

Calcium hydroxide intracanal dressing removal with different rotary instruments and irrigating solutions: a scanning electron microscopy study

Calcium hydroxide intracanal dressing removal with different rotary instruments and irrigating solutions: a scanning electron microscopy study

Eficácia da irrigação ultrassônica passiva na remoção de hidróxido de cálcio

Efficacy of NiTi rotary instruments in removing calcium hydroxide dressing residues from root canal walls

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