An in vitro study of spreader loads required tocause vertical root fracture during lateral condensation

1983 ◽  
Vol 9 (12) ◽  
pp. 544-550 ◽  
Author(s):  
David L. Pitts ◽  
Harvey E. Matheny ◽  
Jack I. Nicholls
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Root Fracture ◽  
Vertical Root Fracture

scholarly journals Fracture Resistance of Retreated Roots Using Different Retreatment Systems

2011 ◽  
Vol 05 (04) ◽  
pp. 387-379 ◽  
Author(s):  
Kursat Er ◽  
Tamer Tasdemir ◽  
Seyda Herguner Siso ◽  
Davut Celik ◽  
Sabri Cora
Keyword(s):  
Fracture Resistance ◽  
In Vitro Study ◽  
Control Group ◽  
Root Fracture ◽  
Vertical Root Fracture ◽  
Root Canals ◽  
Gutta Percha ◽  
Ah Plus ◽  
Post Hoc

ABSTRACTObjectives: This study was designed to evaluate the fracture resistance of retreated roots using different rotary retreatment systems. Methods: Forty eight freshly extracted human canine teeth with single straight root canals were instrumented sequentially increasing from size 30 to a size 55 using K-files whit a stepback technique. The teeth were randomly divided into three experimental and one control groups of 12 specimens each. The root canals were filled using cold lateral compaction of gutta-percha and AH Plus (Dentsply Detrey, Konstanz, Germany) sealer in experimental groups. Removal of gutta-percha was performed with the following devices and techniques: ProTaper Universal (Dentsply Maillefer, Ballaigues, Switzerland), R-Endo (Micro-Mega, Besançon, France), and Mtwo (Sweden & Martina, Padova, Italy) rotary retreatment systems. Control group specimens were only instrumented, not filled or retreated. The specimens were then mounted in copper rings, were filled with a self-curing polymethylmethacrylate resin, and the force required to cause vertical root fracture was measured using a universal testing device. The force of fracture of the roots was recorded and the results in the various groups were compared. Statistical analysis was accomplished by one-way ANOVA and a post hoc Tukey tests. Results: There were statistically significant differences between the control and experimental groups (P<.05). However, there were no significant differences among the experimental groups. Conclusions: Based on the results, all rotary retreatment techniques used in this in vitro study produced similar root weakness. (Eur J Dent 2011;5:387-392)

scholarly journals In vitro Study of Root Fracture Treated by CO2 Laser and DP-bioactive Glass Paste

2008 ◽  
Vol 107 (1) ◽  
pp. 46-53 ◽  
Author(s):  
Yin-Lin Wang ◽  
Bor-Shiunn Lee ◽  
Ching-Li Tseng ◽  
Feng-Huei Lin ◽  
Chun-Pin Lin
Keyword(s):  
Bioactive Glass ◽  
Co2 Laser ◽  
In Vitro Study ◽  
Vitro Study ◽  
Root Fracture ◽  
Glass Paste

Treatment of root fracture by CO2 and Nd:YAG lasers: An in vitro study

1996 ◽  
Vol 22 (12) ◽  
pp. 662-667 ◽  
Author(s):  
Susan Arakawa ◽  
Charles M. Cobb ◽  
John W. Rapley ◽  
William J. Killoy ◽  
Paulette Spencer
Keyword(s):  
In Vitro Study ◽  
Vitro Study ◽  
Root Fracture ◽  
Nd:Yag Lasers
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