Detection of Dentinal Cracks after Root-end Resection: An Ex Vivo Study Comparing Microscopy and Endoscopy with Scanning Electron Microscopy

Arx, Thomas von; Kunz, R.; Schneider, Adrienne Christina; Bürgin, Walter; Lussi, Adrian

doi:10.1016/j.joen.2010.06.016

Cited by 24 publications

(28 citation statements)

References 23 publications

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“…With regard to the detection of extremely fine anatomical details, such as dentinal cracks, the surgical microscope may have limitations (von Arx et al. 2010).…”

Section: Introductionmentioning

confidence: 99%

Apical surgery: endoscopic findings at the resection level of 168 consecutively treated roots

2011

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“…With regard to the detection of extremely fine anatomical details, such as dentinal cracks, the surgical microscope may have limitations (von Arx et al. 2010).…”

Section: Introductionmentioning

confidence: 99%

Apical surgery: endoscopic findings at the resection level of 168 consecutively treated roots

2011

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“…The assessment methods used in such studies are typically photographing root sections or the apical surface using stereoscopic microscopy 16) and digital microscopy 21) , with a limited number using SEM 25) . SEM provides distinct images of dentin sections and the apical surface, allowing detailed observation of microcracks 25) . In the present study, digital microscopy was used to observe dentinal cracks on cut sections, and SEM was used to assess the presence of cracks formed on the apical surface.…”

Section: Discussionmentioning

confidence: 99%

Comparison of dentinal and apical crack formation caused by four different nickel-titanium rotary and reciprocating systems in large and small canals

et al. 2015

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This study compared dentinal and apical crack formation after instrumentation with different nickel-titanium systems at two different working lengths (WL) in large and small canals. Two hundred and eighty human teeth were randomly distributed into two control and 12 experimental groups (n=20 each). Large and small canals were instrumented by the WaveOne, Protaper Universal System (PTU), Twisted File (TF), or Twisted File Adaptive (TFA) at 1 mm shorter than canal length (CL−1 mm) or 1 mm beyond apical foreman (CL+1 mm). Horizontal sections were microscopically observed to evaluate the dentinal cracks (only large canals). Scanning electron microscopy images were taken before and after instrumentation to assess apical cracks. All file types caused more apical cracks in small canals than in large canals regardless of the WL. During over-instrumentation (WL=CL+1 mm), the WaveOne and PTU groups developed significantly more dentinal cracks at the 6 and 9 mm sections than the TF and TFA groups.

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“…The clinical importance of dentinal cracks provoked by apical surgeries is not completely clear, although complete cracks appear to favour leakage and promote recurrent apical infections (16). As such, if the alterations provoked by ultrasonic tips in the root apex influence clinical results, our efforts should be focused on minimising the appearance of these alterations, such as cracks.…”

Section: Discussionmentioning

confidence: 99%

“…These microfractures could influence the healing process around the root, and could lead to failure due to microleakage (11-14). Several different studies have analysed the effects that these ultrasonic instruments have on the root surface during endodontic surgical procedures, using light microscopes, scanning electron microscopes (15), and endoscopy (16). …”

Section: Introductionmentioning

confidence: 99%

Evaluation of apical preparations performed with ultrasonic diamond and stainless steel tips at different intensities using a scanning electron microscope in endodontic surgery

Rodríguez-Martos¹,

Torrés-Lagares²,

Castellanos-Cosano³

et al. 2012

Med Oral

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Objective: The objective of our study is to analyse (with the help of scanning electron microscopes) the quality of the dental root surface and the appearance of dental cracks after performing apical preparations using two diffe-rent types of ultrasonic tips. Study design: We used 32 single-rooted teeth that underwent a root canal and apical resection. Afterwards, the teeth were divided into 4 groups of 8 teeth each, with preparations of the apical cavities in the following manner: Group 1: stainless steel ultrasonic tip at 33KHz. Group 2: stainless steel ultrasonic tip at 30KHz. Group 3: diamond ultrasonic tip at 30KHz. Group 4: diamond ultrasonic tip at 33 KHz. The quality of the root surface and the presence of cracks were evaluated by one single observer using a scanning electron microscope. Results: All of the teeth in our study had cracks after the apical preparations. The mean number of cracks per tooth ranged between 6.1±1.9 (group 1) and 3.5±2.4 (group 4), with a significantly higher number found in the groups that used stainless steel tips (P=.03). The types of cracks produced involved: 8 complete cracks (4.5%), 167 incomplete cracks (94.4%), and 2 intradentinal cracks (1.1%), with no significant differences observed between the different frequencies used for each group. Conclusions: Stainless steel ultrasonic tips provoked a larger number of cracks than diamond tips. The frequency of vibration used did not have any effect on the number of cracks found. Key words:Apicoectomy, scanning electron microscope, therapeutic ultrasound, endodontic surgery, dentinal crack.

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Detection of Dentinal Cracks after Root-end Resection: An Ex Vivo Study Comparing Microscopy and Endoscopy with Scanning Electron Microscopy

Cited by 24 publications

References 23 publications

Apical surgery: endoscopic findings at the resection level of 168 consecutively treated roots

Apical surgery: endoscopic findings at the resection level of 168 consecutively treated roots

Comparison of dentinal and apical crack formation caused by four different nickel-titanium rotary and reciprocating systems in large and small canals

Evaluation of apical preparations performed with ultrasonic diamond and stainless steel tips at different intensities using a scanning electron microscope in endodontic surgery

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