Effect of sodium hypochlorite on dentine mechanical properties. A review

Pascon, Fernanda Miori; Kantovitz, Kamila Rosamilia; Sacramento, Patrícia Almada; Nobre‐dos‐Santos, Marinês; Puppin-Rontani, Regina Maria

doi:10.1016/j.jdent.2009.07.004

Cited by 117 publications

(118 citation statements)

References 23 publications

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“…Considering the aforementioned, it may be speculated that the association of 2.5% NaOCl with ultrasonic agitation is a clinical alternative to improve the debridement of the root canal system, minimizing the known side effects of highly concentrated NaOCl, such as tissue toxicity and possible loss of dentin mechanical strength (24). However, these findings should be confirmed by further research.…”

Section: Pulp Tissue Dissolutionmentioning

confidence: 99%

Bovine Pulp Tissue Dissolution Ability of Irrigants Associated or Not to Ultrasonic Agitation

et al. 2015

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The aim of this study was to evaluate the tissue dissolution ability of different irrigating solutions associated or not to ultrasonic agitation. Ninety bovine pulp fragments (n=10 per group) were weighed and then placed individually in Eppendorf test tubes containing the following irrigants: G1-2.5% sodium hypochlorite (NaOCl); G2-2.5% NaOCl + ultrasonic agitation (US); G3-2.5% NaOCl + 0.2% cetrimide (CTR); G4-2.5% NaOCl + 0.2% CTR + US; G5-400 ppm Sterilox (SX); G6-SX + US; G7-0.2% CTR; G8-0.2% CTR + US; G9-saline solution. Two blinded observers assessed the samples continuously for the first 4 h, and then every hour for the next 12 h. Dissolution speed was calculated by dividing the initial pulp weight (mg) by the period of time until complete dissolution (min). Data were compared by ANOVA and Tukey post hoc test with a 5% significance level. G1 to G4 dissolved pulp fragments completely and G2 was significantly faster than the other groups. G5 to G9 did not exhibit dissolving activity. In conclusion, only groups containing NaOCl were capable of pulp tissue dissolution, which was enhanced by ultrasonic agitation, but did not alter when 0.2% cetrimide was associated. This isolated solution and Sterilox showed no dissolving capacity, regardless the use of ultrasound.

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Section: Pulp Tissue Dissolutionmentioning

confidence: 99%

Bovine Pulp Tissue Dissolution Ability of Irrigants Associated or Not to Ultrasonic Agitation

et al. 2015

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“…However, adverse effects of NaOCl irrigation on dentin's mechanical properties (3,10,11,13,19) have been reported, including decrease of microhardness (10), flexural strength (11) and elastic modulus (3). Sodium hypochlorite promoted loss of dentinal organic components (19) because this solution is a non-specific proteolytic agent.…”

Section: Discussionmentioning

confidence: 99%

“…By losing this organic content, dentinal elastic module and flexural strength decline (3,10). EDTA is widely used as chelate and cleaning agent during endodontic treatment (1).…”

Section: Discussionmentioning

confidence: 99%

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Intracanal Irrigating Solutions Prior to Calcium Hydroxide Medication and Its Effects on Root Dentin Strength

et al. 2017

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The aim of this study was to assess the effects of intracanal irrigation with sodium hypochlorite (NaOCl) and ethylenediaminetetracetic acid (EDTA) prior to calcium hydroxide medication on the compressive strength of root dentin. Forty-eight roots with single and straight canals were instrumented with a crown-down technique using Flexofile files and Gates Glidden burs, under 0.9% sodium chloride (NaCl) irrigation. Root canals were randomly separated into 4 groups (n=12), according to the irrigating solution: Control Group, 0.9% NaCl; Group NaOCl , 1% NaOCl; Group EDTA , 17% EDTA; and Group EDTA+NaOCl , 17% EDTA and 1% NaOCl. Solutions remained for 40 min, renewed every 10 min, except for Group EDTA+NaOCl , where the solutions were alternated every 10 min. Canals were dried and filled with calcium hydroxide paste, and radiographed. Each canal was sealed and stored at 37 °C for 30 days. After this period, the roots were cut 1 mm below the cementoenamel junction and 6 mm apically from this point in order to obtain 6 mm-long cylinders. The compressive test was conducted with a crosshead speed of 1 mm/min. The means (±SD) (MPa) of compressive strength were: Control Group, 151.23±94.36; Group NaOCl , 167.50±57.25; Group EDTA , 108.79±99.88; Group EDTA+NaOCl , 60.12±92.10. Significant statistical differences among groups were found (ANOVA and Tukey, α=5%, p=0.02). Control Group and Group NaOCl showed higher means of compressive strength than Group EDTA+NaOCl . Intracanal irrigation with 17% EDTA and 1% NaOCl produced a significant reduction of dentin compressive strength 30 days after medication with calcium hydroxide.

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“…стенок корня в процессе механической обработки корне-вых каналов [6], чрезмерное давление спредера [9], агрес-сивное воздействие антисептиков для ирригации корне-вых каналов [3,8], изменение распределения окклюзион-ной нагрузки в результате восстановления зуба штифто-выми конструкциями [7].…”

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The resistance of teeth to vertical root fractures after mechanical preparation and irrigation of root canal (pilot study)

Makeeva¹,

Biakova²,

Kazakov³

et al. 2016

Stomat.

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Effect of sodium hypochlorite on dentine mechanical properties. A review

Abstract: Based on this review, the authors suggest that there is strong evidence showing that sodium hypochlorite adversely alters the mechanical properties of root dentine, when used as an endodontic irrigant.

Cited by 117 publications

References 23 publications

Bovine Pulp Tissue Dissolution Ability of Irrigants Associated or Not to Ultrasonic Agitation

Bovine Pulp Tissue Dissolution Ability of Irrigants Associated or Not to Ultrasonic Agitation

Intracanal Irrigating Solutions Prior to Calcium Hydroxide Medication and Its Effects on Root Dentin Strength

The resistance of teeth to vertical root fractures after mechanical preparation and irrigation of root canal (pilot study)

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