Investigation of Dentin Hardness in Roots Exhibiting the Butterfly Effect

Russell, Assil A; He, Long; Chandler, Nicholas

doi:10.1016/j.joen.2013.11.005

Cited by 23 publications

(19 citation statements)

References 13 publications

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“…Studies exploring why cracks develop in this direction are limited. Research has suggested that teeth with the butterfly effect are more prone to developing cracks in the buccolingual direction because of their significantly higher dentine hardness mesiodistally (12). The present investigation demonstrates the high number of buccolingual defects that develop in teeth with the butterfly effect following ultrasonic root-end preparation.…”

Section: Disclosuresmentioning

confidence: 49%

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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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Section: Disclosuresmentioning

confidence: 49%

“…Most VRFs occur in root-filled teeth, and they usually run in the buccolingual direction (11). It has been suggested that teeth with the butterfly effect are more prone to developing cracks in this direction because of their significantly higher dentine hardness mesiodistally (12).…”

Section: Introductionmentioning

confidence: 99%

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

2018

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“…The microhardness of dentin can vary from the pulpal to the cemental part of the root dentin due to differences in tubule density (36). Additionally, Russell et al (37) reported that teeth with the butterfly effect had a higher density of dentinal tubules buccolingually than mesiodistally, suggesting that this may affect the hardness of dentin. The 'butterfly' effect is an optical phenomenon in some cross sections of tooth roots caused by different shades of dentin (38).…”

Section: Discussionmentioning

confidence: 99%

The effect of antibiotic pastes on microhardness of dentin

Yılmaz

Dumani

Yoldaş

2015

Dental Traumatology

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“…K C may also be adversely affected by foreign objects and bacteria accommodated in dentinal cracks (31); the latter tend to form during root canal preparation (24)(25)(26). Another case in which K C may reduce is in root sections exhibiting the butterfly effect in which the dentin is harder mesiodistally (32). This might explain the high prevalence of vertical root fractures that run buccolingually.…”

Section: Discussionmentioning

confidence: 99%