The effects of canal preparation and filling on the incidence of dentinal defects

Shemesh, Hagay; Bier, Carlos Alexandre Souza; Wu, Min-Kai; Tanomaru-Filho, Mário; Wesselink, Paul R.

doi:10.1111/j.1365-2591.2008.01502.x

Cited by 224 publications

(300 citation statements)

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“…In the present study, craze lines were not observed in unprepared teeth, in agreement with previous studies [1,11,12,22,23], but when craze lines were also observed in unprepared teeth, it was assumed that they may be a result of forces induced during extraction procedures.…”

Section: Brazilian Research Insupporting

confidence: 93%

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Prevalence of Dentinal Defects after Root Canal Preparations in Molars with Reciproc and WaveOne Systems

Amaral

Santos

Salazar-Silva

et al. 2016

Pesqui. bras. odontopediatria clín. integr.

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Objective: To evaluate the prevalence of dentin defects, including partial and complete cracks and fractures, after root canal preparation in molars with Reciproc and WaveOne reciprocating instruments. Material and Methods: Fifty mandibular first and second molars with mature apices were selected to endodontic in vitro instrumentation. Ten teeth were unprepared and served as the control, and the remaining forty teeth were divided into two groups, being twenty corresponding to each reciprocating system. Reciproc and WaveOne systems were used in a reciprocating working motion, under the same conditions, to prepare the two mesial canals. Roots were then sectioned 2, 4 and 6 mm from the apex, and the cut surface was observed under a microscope using 20-fold magnification and checked for the presence of fractures and incomplete cracks. Results: none of the evaluated groups presented fractures, and the control group showed no incomplete cracks. Overall evaluation showed statistical differences between these two groups and the control group (p=0.017) for the prevalence of incomplete cracks, but no significant differences were obtained between Reciproc and WaveOne groups (p>0.05). Reciproc group presented more incomplete cracks on 4-mm sections compared with the control group on the same section (p=0.0326). Conclusion: Root canal preparation with both reciprocating instruments resulted in incomplete cracks, but not fractures. At the level of 4 mm from the apex of the canals, the Reciproc system produced significantly more incomplete cracks. Considering both systems, WaveOne utilization resulted in lesser structural alterations on dentin considering the middle portion of the roots.

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Section: Brazilian Research Insupporting

confidence: 93%

“…Fractures were also seen after use of full-sequence rotary systems in mandibular premolars [22]. In our study using mandibular first and second molars, no complete fractures were observed in any of the samples, similar to a previous study in which mandibular premolars were used [23].…”

Section: Brazilian Research Insupporting

confidence: 89%

Prevalence of Dentinal Defects after Root Canal Preparations in Molars with Reciproc and WaveOne Systems

Amaral

Santos

Salazar-Silva

et al. 2016

Pesqui. bras. odontopediatria clín. integr.

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“…Published studies on this topic always embrace cutting procedures and postoperative observation through optical microscopy technique. Under this methodological approach, it has been stated that NiTi rotary preparation per se might have an etiological role in the creation of dentinal defects (4)(5)(6)(7)(8)(9). Although these studies seem experimentally sound at first sight, as most of control groups using non-prepared teeth showed, in most cases, no dentinal defects, the destructive approach of the method stands for its major drawback, since the preoperative condition of the dentin is unknown.…”

Section: Introductionmentioning

confidence: 99%

On the Causality Between Dentinal Defects and Root Canal Preparation: A Micro-CT Assessment

et al. 2016

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This study aimed to evaluate the cause-effect relationship between canal preparation with ProTaper Universal (PTU) system and dentinal defects formation using micro-computed tomography (micro-CT) analysis. Forty mesial canals of mandibular molars with a type II Vertucci's canal configuration were scanned at an isotropic resolution of 14.16 µm. The sample was assigned to an experimental (n = 30) and a control (n = 10) groups, and the mesial canals were prepared with PTU system up to F2 instrument. The specimens from the experimental group were scanned and the cross-section images of the mesial roots, before and after preparation, were screened to identify the presence of dentinal defects. In the control group, the specimens were sectioned perpendicularly to the long axis of the root into 1-mm-thick slices (n = 80) and examined under optical microscope. Once a dentinal defect was detected, the slice was scanned through micro-CT. In the experimental group, dentinal micro-cracks were observed in 4,828 slices (24.04%). In all cross-section images, dentinal defects identified in the postoperative images were already present in the corresponding preoperative image. In the control group, 13 out of 80 slices (16.25%) had at least one dentinal defect visualized under stereomicroscopy, which was identified after a further micro-CT scanning. Micro-CT showed reliability as similar as optical microscopy in detecting dentinal defects, adding the possibility of tracking the dentinal tissue, before and after canal preparation, and providing a clear visualization of micro-cracks. Root canal preparation with PTU system did not induce the formation of new dentinal defects.

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“…Vertikal kök kırıkları, endodontik tedavili dişlerde başarısızlığa neden olan önemli faktörler arasındadır 1,2,3 . Kök kanal şekillendirmesi sırasında kök yüzeyinde meydana gelen mikroçatlaklar, kök kırıklarının oluşmasında rol oynamaktadır 4,5 .…”

Section: Introductionunclassified

Evaluation of Dentinal Defects After Different Root Canal Preparation Techniques

Kaval¹,

Bilgi²,

Demirci³

et al. 2017

EÜ Dişhek Fak Derg

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ÖZET AMAÇ: El eğeleri, nikel-titanyum döner eğeler ve resiprokal sistemler ile kök kanallarının genişletilmesi sonrası, kök dentininde meydana gelen defektlerin incelenmesi amaçlandı. YÖNTEM: Çalışmamizda aynı boyutta, kök ucu gelişimi tamamlanmış, 60 adet maksiller santral kesici diş kullanıldı. Herhangi bir işlem uygulanmayan 12 adet diş kontrol grubunu oluşturdu ve kalan 48 adet diş her grupta 12 adet diş olacak şekilde 4 farklı gruba ayrıldı. Dişler Hedström tipi el eğeleri, Protaper Universal (PTU) (Dentsply Maillefer, Balligues, İsviçre), Reciproc (VDW, Münih, Almanya) ve Twisted File Adaptive (TFA) (SybronEndo, Orange, CA) sistemleri ile şekillendirildi. Dişlerden, apeksten 3, 6 ve 9 mm uzaklıkta olacak şekilde kesitler alındı ve örnekler 25 X büyütme altında steoromikroskop ile incelendi. Örnekler deney gruplarını bilmeyen iki gözlemci tarafından değerlendirildi. Gözlemciler arası uyum Kappa testi ile, deney grupları arasındaki fark ise Ki kare testi ile istatistiksel olarak analiz edildi (α= 0,05). BULGULAR: Reciproc grubunda, TF Adaptive ve kontrol grubuna göre daha fazla sayıda defekt meydana geldi (P < 0.05). Gruplar arasında yapılan diğer tüm karşılaştırmalarda istatistiksel olarak anlamlı farklılık tespit edilmedi (P > 0.05). SONUÇ: Bu ex vivo çalışmanın sınırları dahilinde, dentin defektlerinin dağılımı incelendiğinde, TFA sistemini geniş ve düz köklü dişlerin kök kanal genişletmesinde güvenli bir şekilde kullanılabileceği sonucuna ulaşılmıştır. Bununla birlikte, araştırmamızda elde edilen bulguların klinik çalışmalarla da değerlendirilmesinin uygun olacağı düşünülmektedir.

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The effects of canal preparation and filling on the incidence of dentinal defects

Abstract: Root canal preparation and filling of extracted teeth created dentine defects such as fractures, craze lines and incomplete cracks.

Cited by 224 publications

References 31 publications

Prevalence of Dentinal Defects after Root Canal Preparations in Molars with Reciproc and WaveOne Systems

Prevalence of Dentinal Defects after Root Canal Preparations in Molars with Reciproc and WaveOne Systems

On the Causality Between Dentinal Defects and Root Canal Preparation: A Micro-CT Assessment

Evaluation of Dentinal Defects After Different Root Canal Preparation Techniques

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