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

Arx, Thomas von; Steiner, R. Gemmet; Tay, Franklin R.

doi:10.1111/j.1365-2591.2010.01811.x

Cited by 44 publications

(32 citation statements)

References 30 publications

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“…On the other hand, a previous study (5) failed to show a correlation between the apical diameter of maxillary molars and age. Clinical research has shown that isthmuses in mandibular molars are highly associated with failure of endodontic treatment (2,34,35). The presence of bacterial biofilms at the apical third after endodontic treatment has also been confirmed in these anatomical irregularities (35,36).…”

Section: Discussionmentioning

confidence: 96%

Micro–Computed Tomography Study of the Internal Anatomy of Mesial Root Canals of Mandibular Molars

Villas-Bôas

Bernardineli

Cavenago

et al. 2011

Journal of Endodontics

109

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Section: Discussionmentioning

confidence: 96%

Micro–Computed Tomography Study of the Internal Anatomy of Mesial Root Canals of Mandibular Molars

Villas-Bôas

Bernardineli

Cavenago

et al. 2011

Journal of Endodontics

109

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“…Refraction of light on sclerosed dentin and the presence of translucent wings of the butterfly may explain the increased difficulty in crack detection. Use of an endoscope (25), transillumination with an LED diagnostic probe (21), and staining of the root-end with dyes, such as methylene blue, may help in detecting cracks (25).…”

Section: Disclosuresmentioning

confidence: 99%

Crack formation following root-end preparation in roots with the butterfly effect

2018

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HIGHLIGHTSObjective: To investigate apical cracks in roots that exhibit the butterfly effect and that have undergone apical resection and ultrasonic root-end cavity preparation. The effect of the obturation material was also studied. Methods: Forty extracted single-rooted teeth were decoronated at the cemento-enamel junction. Roots were viewed under a light microscope and coded according to the presence or absence of the butterfly effect. Canals were prepared using ProTaper Next instruments to size X3 and assigned to two obturation groups (gutta-percha and AH Plus, and ProRoot MTA alone). Each contained twenty roots (10 with the butterfly effect and 10 without the butterfly effect). Roots were resected perpendicular to their long axis, 3 mm from the apex, and cavities were cut using ultrasonic retrotips. Resin replicas were used for crack imaging from scanning electron micrographs. Statistical analyses were performed using Stata 13.1 (StataCorp, College Station, TX, USA). Results: Cracks occurred more frequently in teeth with the butterfly effect (80%), with this difference being significant (P=0.001). Most cracks (73%) ran buccolingually. Teeth obturated with MTA developed fewer cracks compared to those obturated with GP and sealer. Conclusion: Root-ends with the butterfly effect had a significantly higher number of buccolingual cracks following resection and ultrasonic root-end preparation. This might explain the development of some vertical root fractures, which usually run buccolingually. Canal obturation with MTA may be protective.

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“…As shown in the studies by von Arx et al (22,23), isthmus prevalence is greatest in single roots with 2 canals such as maxillary first premolars and mesial roots of mandibular molars. Accordingly, the model predicts that VRF in such roots should be much more common than in 1-canal roots.…”

Section: Discussionmentioning

confidence: 89%

The Effect of Isthmus on Vertical Root Fracture in Endodontically Treated Teeth

Chai

Tamse

2015

Journal of Endodontics

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

Abstract: Frosted dentine and gaps were frequently observed with endoscopy at the resected root surfaces. The type of tooth appeared to affect the occurrence of a craze line/crack and of frosted dentine.

Cited by 44 publications

References 30 publications

Micro–Computed Tomography Study of the Internal Anatomy of Mesial Root Canals of Mandibular Molars

Micro–Computed Tomography Study of the Internal Anatomy of Mesial Root Canals of Mandibular Molars

Crack formation following root-end preparation in roots with the butterfly effect

The Effect of Isthmus on Vertical Root Fracture in Endodontically Treated Teeth

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