Fracture resistance of root-filled teeth after cavity preparation with conventional burs

Authors : Uğur AYDIN, Fatih AKSOY, Samet TOSUN

Pages : 59-63

View : 25 | Download : 6

Publication Date : 2018-05-01

Article Type : Research Paper

Abstract :Purpose The aim of the present study is to compare the fracture resistance of teeth after access cavity preparation with conventional rotary burs, Erbium-doped yttrium aluminum garnet laser insert ignore into journalissuearticles values(Er:YAG); and Erbium, cromium: yttrium scandium gallium garnet laser insert ignore into journalissuearticles values(Er,Cr:YSGG); lasers. Materials and methods Fifty five intact mandibular molars were divided into 3 negative groups insert ignore into journalissuearticles values(groups 1, 2, 3; n=5 for each);, 3 study groups insert ignore into journalissuearticles values(groups 4, 5, 6; n=10 for each); and 1 positive control group insert ignore into journalissuearticles values(intact teeth; n=10);. Access cavities of groups 1, 2 and 3 were prepared with conventional burs, Er:YAG laser and Er,Cr:YSGG laser respectively. After root canal obturation, their coronal portions were left non-restored. Access cavities of groups 4, 5 and 6 were prepared by using the same equipment but their coronal portions were restored with composite resinafter root canal obturation. Following thermocycling, fracture strength was evaluated with a Universal Testing Machine. Mean force at which each sample is fractured was recorded in Newton unit and statistically analyzed. Results Fracture resistance of group 7 insert ignore into journalissuearticles values(intact teeth); was significantly higher than all other groups insert ignore into journalissuearticles values(p<0.001);. Differences among the fracture resistance values of groups 4, 5 and 6 were not significantly different but they were significantly higher than those of groups 1, 2 and 3 insert ignore into journalissuearticles values(p<0.001);. No significant difference was found between Groups 1, 2 and 3. Conclusion Preparing access cavities with either laser or bur has no effect on the fracture resistance of teeth with root canal treatment.
Keywords : Bur, cavity preparation, Er, Cr YSGG, Er YAG, fracture resistance