Comparison of the incidences of apical root cracks after canal preparation with two nickel-titanium rotary systems:an in vitro study / 北京大学学报(医学版)
Journal of Peking University(Health Sciences)
;
(6): 129-133, 2015.
Article
Dans Chinois
| WPRIM
| ID: wpr-461085
ABSTRACT
Objective:
To compare the incidences of root cracks after canal instrumentation with HyFlex CM system and the ProTaper Universal system .Methods:
Sixty mandibular incisors were mounted in resin blocks with simulated periodontal ligaments , and the apex was exposed .The control group of 20 teeth was not prepared , and the other 40 teeth were divided into 2 experimental groups ( n=20 ) .The 40 root canals of the experimental groups were instrumented using HyFlex CM and ProTaper Universal to the major apical foramen ( AF).The horizontal sections 1 mm, 2 mm, and 3 mm from the apex were observed under an optical stereomicroscope at 25 ×magnification .The presence of cracks was noted .Results:
No cracks were found in the control teeth .Cracks were found in 1 of 20 ( 5%) teeth in HyFlex CM group , and 17 of 20 ( 85%) teeth in ProTaper Universal group .The difference between the two experimental groups was statistically significant (P<0.01).Conclusion:
The HyFlex CM files caused fewer root cracks than the ProTaper Universal files during the root canal instrumentation .
Texte intégral:
Disponible
Indice:
WPRIM (Pacifique occidental)
langue:
Chinois
Texte intégral:
Journal of Peking University(Health Sciences)
Année:
2015
Type:
Article
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