Effect of endodontic irrigation solutions on microhardness of root canal dentine

Saleh, Abeer A. Mokeem; Ettman, W.M

doi:10.1016/s0300-5712(98)00018-9

Cited by 153 publications

(157 citation statements)

References 22 publications

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“…It has been known for some time that varying concentrations of chelating agents, such as EDTA, acids, and disinfecting agents such as sodium hypochlorite (NaOCl), have demonstrated an ability to undermine dentin microhardness and elasticity (60)(61)(62)(63), while a more recent study has reported that dentin subject to prolonged calcium hydroxide (CaOH) exposure, demonstrates a decreased resistance to fracture (162).…”

Section: Discussionmentioning

confidence: 99%

“…The use of 5.25% NaOCl has been reported to decrease Young's modulus of dentin, in addition to its flexural stress (62). Reduction in dentin elasticity after treatment with NaOCl has also been reported (60,61,63). This may be due to the dissolution of the organic component of the dentin by NaOCl.…”

Section: Ultrastructural Changes To Dentin Following Iatrogenic Procementioning

confidence: 99%

“…Structural changes in dentin as a result of chemicals used for endodontic irrigation have been extensively studied in the literature (9,10,(59)(60)(61)(62). Changes in the organic and inorganic components of dentin will affect the mechanical properties of dentin.…”

Section: Ultrastructural Changes To Dentin Following Iatrogenic Procementioning

confidence: 99%

“…Changes in the organic and inorganic components of dentin will affect the mechanical properties of dentin. Various concentrations of chelating agents, including ethylenediaminetetraacetic acid (EDTA) and citric acid, can reduce dentin microhardness (60,61,63). Sodium hypochlorite (NaOCl) is the most commonly used endodontic antimicrobial irrigant, which has the ability to dissolve the organic material.…”

Section: Ultrastructural Changes To Dentin Following Iatrogenic Procementioning

confidence: 99%

See 3 more Smart Citations

Bioactive Chitosan Nanoparticles and Photodynamic Therapy Inhibit Collagen Degradation In Vitro

Persadmehr

Torneck

Cvitkovitch

et al. 2014

Journal of Endodontics

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This study evaluated the ability of photodynamic therapy (PDT), chitosan nanoparticles (CSnp), or their combination, to inhibit bacterial collagenase-mediated degradation of collagen. Rat type 1 fibrillar collagen matrices were untreated or treated with 2.5% glutaraldehyde (GD), 2.5% GD followed by 1% CSnp, 1% CSnp, PDT, or 1% CSnp followed by PDT. Samples, except untreated controls, were exposed to Clostridium histolyticum collagenase. The soluble digestion products were assessed by hydroxyproline assay and the remaining adherent collagen was quantified by picrosirius red (PSR) staining. Collagen treated with CSnp, PDT, or a combination of CSnp and PDT, exhibited less degradation than controls. The abundance of post-treatment residual collagen correlated with the extent of degradation. Fourier transform infrared (FTIR) spectroscopy analysis showed that PDT treatment enhanced collagen cross-linking.Immunoblotting of sedimented CSnp indicated that CSnp and collagenase bound with low affinity. However, CSnp-bound collagenase showed a significant reduction in collagenolytic activity compared with controls.III

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Section: Discussionmentioning

confidence: 99%

Section: Ultrastructural Changes To Dentin Following Iatrogenic Procementioning

confidence: 99%

Section: Ultrastructural Changes To Dentin Following Iatrogenic Procementioning

confidence: 99%

Section: Ultrastructural Changes To Dentin Following Iatrogenic Procementioning

confidence: 99%

See 2 more Smart Citations

Bioactive Chitosan Nanoparticles and Photodynamic Therapy Inhibit Collagen Degradation In Vitro

Persadmehr

Torneck

Cvitkovitch

et al. 2014

Journal of Endodontics

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“…Bu çalışmada, çalışma boyu nedeniyle oluşacak defekt oluşumunu elimine etmek için kök kanallarını kanal boyundan 1 mm kısa olarak belirlediğimiz çalışma boyunda genişlettik. Endodontik irigasyon solüsyonu olarak kullanılan NaOCl'nin dentinin mekanik özelliklerini değiştirdiği yapılan pek çok çalışma ile kanıtlanmıştır 11,12 . NaOCl, irigasyon solüsyonu olarak yüksek konsantrasyonda kullanıldığında dentin dokusunun elastiklik modülünü ve esneklik kabiliyetini önemli ölçüde azaltmaktadır.…”

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The Effect Of Different Preparation Systems On Dentinal Defect Formation

Salameh¹,

Şerefoğlu²,

Pişkin³

2017

EÜ Dişhek Fak Derg

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ÖZ AMAÇ: Self -adjusting file, LightSpeed LSX, ProTaper ve H-tipi el eğesi ile genişletilen daimi insan alt küçük azı dişlerinde genişletme sisteminin kök kanal dentini üzerindeki defekt oluşumuna etkisinin incelenmesidir. YÖNTEM: Çalışmada 50 adet periodontal nedenlerle çekilmiş insan alt küçük azı dişi kullanıldı. Tüm gruplarda 10 ar adet örnek olacak şekilde dişler rastgele 5 gruba ayrıldı. Kök kanallarında Self-adjusting file, ProTaper, LightSpeed LSX sistemleri ve H-tipi el eğeleri ile genişletme ve şekillendirme işlemi tamamlandı. Ardından kök ucundan itibaren koronale doğru 3, 6 ve 9 mm'lerden kesitler alındı. Kök ucunun ve elde edilen kesitlerin x20 büyütmede stereomikroskopta fotoğrafları çekildi. Fotoğraflar iki tarafsız gözlemci tarafından defekt var ve defekt yok olmak üzere 2 skorlu sistem ile değerlendirildi. BULGULAR: Kök ucu, 3 mm ve 6 mm'de sistemler arasında fark görülmezken, 9 mm de LightSpeed LSX grubunda kontrol grubuna göre anlamlı derecede defekt gözlendi. LightSpeed LSX ve ProTaper gruplarında SAF grubuna kıyasla istatistiksel olarak anlamlı derecede daha fazla dentin defekti gözlendi (SAF-ProTaper p=0,038 SAF-LightSpeed p=0,022). SONUÇ: Yüksek hız ve torkta çalışan LightSpeed LSX ile artan konisiteye sahip ProTaper döner alet sistemlerinin dentin üzerinde daha fazla defekt oluşumuna neden olduğu görüldü. 3,6, and 9 mm from the apex, and photographs were taken under X 20 magnification using a stereomicroscope. All photographs was scored as defect (+) or no defect by two independent observer. RESULTS: Although there were no difference at apeks, 3mm and 6 mm between the experimental groups, statistically significant dentin defects was observed in LightSpeed LSX group when compared with control group. LightSpeed LSX and Protaper caused significantly more dentin defects than SAF system (SAFProTaper p=0,022

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Effects of chemical agents on physical properties and structure of primary pulp chamber dentin

Pascon

Kantovitz

Gaspar

et al. 2013

Microscopy Res & Technique

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This study evaluated the effects of chemical agents on the physical properties and structure of primary pulp chamber dentin using surface roughness, microhardness tests, and scanning electron microscopy (SEM). Twenty-five primary teeth were sectioned exposing the pulp chamber and were divided into five groups (n = 5): NT, no treatment; SH1, 1% sodium hypochlorite (NaOCl); SH1U, 1% NaOCl + Endo-PTC®; SH1E, 1% NaOCl + 17% EDTA; and E, 17% EDTA. After dentin treatment, the specimens were submitted to roughness, microhardness testing, and SEM analysis. Roughness and microhardness data were submitted to one-way ANOVA and Tukey's test (P < 0.05). The SH1E group showed the highest roughness, followed by the E group (P < 0.05) when compared with the NT, SH1, and SH1U groups. Microhardness values of SH1 and SH1U showed no significant difference as compared to the NT (control) group (P > 0.05). Microhardness values could not be obtained in the EDTA groups (SH1E and E). The presence of intertubular dentin with opened dentin tubules was observed in the NT, SH1, and SH1U groups. SH1E showed eroded and disorganized dentin with few opened tubules and the intertubular/peritubular dentin was partially removed. Considering the physical and structural approaches and the chemical agents studied, it can be concluded that NaOCl and NaOCl associated with Endo-PTC® were the agents that promoted the smallest changes in surface roughness, microhardness, and structure of the pulp chamber dentin of primary teeth.

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Effect of endodontic irrigation solutions on microhardness of root canal dentine

Cited by 153 publications

References 22 publications

Bioactive Chitosan Nanoparticles and Photodynamic Therapy Inhibit Collagen Degradation In Vitro

Bioactive Chitosan Nanoparticles and Photodynamic Therapy Inhibit Collagen Degradation In Vitro

The Effect Of Different Preparation Systems On Dentinal Defect Formation

Effects of chemical agents on physical properties and structure of primary pulp chamber dentin

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