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Dehghan Banadkooki S, Donyavi Z, Hafedi A. Effect of Spreader Taper on Root Fracture Resistance in Canals Obturated with Gutta-Percha/AH26 By Lateral Condensation Technique. aumj 2024; 13 (1) :17-25
URL: http://aums.abzums.ac.ir/article-1-1634-en.html
URL: http://aums.abzums.ac.ir/article-1-1634-en.html
1- Assistant Professor, Department of Endodontics, School of Dentistry, Alborz University of Medical Sciences, Karaj, Iran
2- Student Research Committee, Faculty of Dentistry, Alborz University of Medical Sciences, karaj, Iran
2- Student Research Committee, Faculty of Dentistry, Alborz University of Medical Sciences, karaj, Iran
Abstract: (561 Views)
Aim and background: This study was performed to investigate the effect of taper of stainless-steel spreader on root fracture resistance by applying the same force.
Materials and methods: This study was performed on forty extracted lateral maxillary teeth. Root canal preparation was performed on all samples. Before canal obturation, samples were divided in four groups randomly. Group 1, lateral condensation using a stainless-steel spreader with 2% taper. Group 2 was obturated with a stainless-steel spreader of the same material but with 4% taper, as in group one. In group three or negative control, the canals were not obturated, and in group four or positive control, lateral condensation technique was performed until cracks were created in the root. After 72-hour incubation and thermocycling, fracture resistance test was done. Data obtained were statistically analysed using SPSS, one way ANOVA and post Hoc Bonferouni.
Results: For statistical analysis, the significance level was p<0.05. Fracture resistance values were as follow, respectively: negative control> 25/0.02 spreader group> 25/0.04 spreader group> positive control. Fracture resistance in obturated canals by 25/0.02 or 25/0.04 spreaders and unobturated canal was significantly more than positive control, although pair by pair comparison of these three groups showed no significant difference.
Conclusion: Using 25/0.02 and 25/0.04 stainless steel spreaders in lateral condensation technique didn’t make a significant reduction in fracture resistance values of the roots.
Materials and methods: This study was performed on forty extracted lateral maxillary teeth. Root canal preparation was performed on all samples. Before canal obturation, samples were divided in four groups randomly. Group 1, lateral condensation using a stainless-steel spreader with 2% taper. Group 2 was obturated with a stainless-steel spreader of the same material but with 4% taper, as in group one. In group three or negative control, the canals were not obturated, and in group four or positive control, lateral condensation technique was performed until cracks were created in the root. After 72-hour incubation and thermocycling, fracture resistance test was done. Data obtained were statistically analysed using SPSS, one way ANOVA and post Hoc Bonferouni.
Results: For statistical analysis, the significance level was p<0.05. Fracture resistance values were as follow, respectively: negative control> 25/0.02 spreader group> 25/0.04 spreader group> positive control. Fracture resistance in obturated canals by 25/0.02 or 25/0.04 spreaders and unobturated canal was significantly more than positive control, although pair by pair comparison of these three groups showed no significant difference.
Conclusion: Using 25/0.02 and 25/0.04 stainless steel spreaders in lateral condensation technique didn’t make a significant reduction in fracture resistance values of the roots.
Type of Study: Research |
Subject:
Special
Received: 2022/11/15 | Accepted: 2023/02/08 | Published: 2024/02/29
Received: 2022/11/15 | Accepted: 2023/02/08 | Published: 2024/02/29
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