Vertical root fracture resistance and dentinal crack formation of root canal-treated teeth instrumented with different nickel–titanium rotary systems: an in-vitro study

Odontology ◽  
2021 ◽  
Author(s):  
Galvin Sim Siang Lin ◽  
Kiran Prabhakar Singbal ◽  
Tahir Yusuf Noorani ◽  
Raghavendra Penukonda
Keyword(s):  
Root Canal ◽  
Fracture Resistance ◽  
Crack Formation ◽  
In Vitro Study ◽  
Nickel Titanium ◽  
Vitro Study ◽  
Root Fracture ◽  
Vertical Root Fracture ◽  
Root Fracture Resistance

scholarly journals A Comparative Evaluation of the Vertical Root Fracture Resistance of Endodontically Treated Teeth using Different Root Canal Sealers: An in vitro Study

2012 ◽  
Vol 13 (3) ◽  
pp. 351-355 ◽  
Author(s):  
MB Prashanth ◽  
Pradeep N Tavane ◽  
BM Annapoorna ◽  
NT Prashanth ◽  
BS Deepak ◽  
...  
Keyword(s):  
Root Canal ◽  
Fracture Resistance ◽  
Negative Control ◽  
Endodontically Treated Teeth ◽  
Root Fracture ◽  
Vertical Root Fracture ◽  
Gutta Percha ◽  
Root Fracture Resistance ◽  
Experimental Group

ABSTRACT Objective The objective of this study is to evaluate the vertical root fracture resistance of endodontically treated teeth obturated with – Tubli-Seal EWT/Gutta-percha, AH Plus/Gutta-percha, Epiphany SE sealer/Epiphany point. Study design Sixty-five single rooted premolars were decoronated and root length was 14 mm for each specimen. Fifty five teeth were enlarged up to ISO size 40 master apical file with stainless steel K-files using standardized preparation and remaining ten teeth were served as negative control. Then teeth were randomly assigned into different groups depending on sealer used for obturation as follows: Group 1 Negative control—no instrumentation was performed. Group 2 Positive control—gutta-percha with out the use of any sealer. Group 3 Experimental group—gutta-percha and Tubli-Seal EWT root canal sealer. Group 4 Experimental group—gutta-percha and AH Plus. Group 5 Experimental group—epiphany SE sealer and epiphany points. After 72 hours, the specimens were embedded in autopolymerizing resin leaving 7 mm of each root exposed and were subjected to fracture testing under universal testing machine at a crosshead speed of 1.0 mm per minute until the root fractured. Results were statistically analyzed using one-way ANOVA and independent t-test. Results Showed that Epiphany SE sealer/Epiphany points showed highest mean fracture resistance and Tubli-Seal EWT group showed the least fracture resistance of all the materials tested. There was no statistically significant difference among experimental groups. Conclusion Epiphany SE sealer/Epiphany points demonstrated highest fracture resistance values than the other materials tested and intact tooth had highest resistance against vertical root fracture. Clinical significance Epiphany SE sealer/Epiphany points may be one of the materials of choice in the endodontic treatment of teeth. How to cite this article Nagpal A, Annapoorna BM, Prashanth MB, Prashanth NT, Singla M, Deepak BS, Singh A, Tavane PN. A Comparative Evaluation of the Vertical Root Fracture Resistance of Endodontically Treated Teeth using Different Root Canal Sealers: An in vitro Study. J Contemp Dent Pract 2012;13(3):351-355.

scholarly journals The potential effect of instrumentation with different nickel titanium rotary systems on dentinal crack formation—An in vitro study

PLoS ONE ◽  
2020 ◽  
Vol 15 (9) ◽  
pp. e0238790
Author(s):  
Márk Fráter ◽  
András Jakab ◽  
Gábor Braunitzer ◽  
Zsolt Tóth ◽  
Katalin Nagy
Keyword(s):  
Crack Formation ◽  
In Vitro Study ◽  
Potential Effect ◽  
Nickel Titanium ◽  
Vitro Study

scholarly journals Mathematical validation of measurement of root fracture resistance: an in vitro study

2021 ◽  
Vol 21 (1) ◽  
Author(s):  
Rafat Bagheri ◽  
Abbas Abbaszadegan ◽  
Mohammad R. Nabavizadeh ◽  
Maryam Ferooz ◽  
Peter Parashos
Keyword(s):  
Fracture Resistance ◽  
Testing Machine ◽  
In Vitro Study ◽  
Maximum Load ◽  
Control Groups ◽  
Root Fracture ◽  
Root Canals ◽  
Gutta Percha ◽  
Root Fracture Resistance

Abstract Background The aim of this study was to develop a mathematically valid method of assessing fracture resistance of roots. The model developed used mesial roots of lower molars instrumented using stainless steel hand files (SS) and two rotary nickel-titanium (NiTi) systems. Methods Eighty human lower molars were selected and randomly divided into four groups (n = 20). After instrumentation, the root canals were obturated using thermoplasticized gutta percha. The roots were covered with a simulated periodontal ligament and mounted vertically in autopolymerizing acrylic in PVC tubes. Using a universal testing machine, the force to fracture (N) was applied and the maximum load (FL) was recorded. Remaining dentine volume was calculated and the fracture resistance (FR) was recorded. The data were analyzed using SPSS version 22 with P < .05. Results There were no significant differences among the instrumentation methods for FL but in FR the roots instrumented using rotary NiTi showed significantly lower values than control groups and SS files (P < 0.001). Conclusions Considering the effect of root length, volume of the root, and volume of the instrumented canal as well as the maximum failure load may be a more objective method of reporting fracture resistance of roots.

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