Fracture resistance of roots filled with three different obturation techniques

Abstract

Objectives: The aim of this study was to compare in vitro root fracture resistance following root canal filling with AH 26 using lateral condensation, BeeFill, and Thermafil techniques. Study Design: Eighty extracted human mandibular premolars with similar dimensions were selected. In order to standardize the roots, measurements were taken in two separate regions of the teeth—at the cemento-enamel junction and 8 mm apically from the junction—buccolingual as well as mesiodistal for every tooth. Teeth were then randomly divided into five groups (n=16). With the exception of the non-prepared group (Group 1), instrumentation was done in all groups. In group 2, instrumentation but no filling was performed; in group 3, the obturation was done with AH 26 + gutta-percha; in group 4, with AH 26 + BeeFill and in group 5, AH 26 + a Thermafil obturator was used. All the roots were mounted vertically in copper rings and filled with acrylic resin, exposing 8 mm of the coronal part. A universal testing machine was used for the strength test. Results: The results were analyzed using the one-way ANOVA test. The significance between the groups was tested with Temhane’s T2 test. The results indicate that instrumentation of root canals had a significant effect on fracture resistance (p<0.05). In addition, there were no differences between the root canal obturation techniques; furthermore, these techniques did not create a statistically important resistance to vertical fracture (p>0.05). Conclusions: The results suggest that instrumentation of root canals significantly weakens the tooth structure to fracture and the root canal obturation techniques that are used are not able to form reinforcement. Key words:AH 26, obturation technique, vertical fracture.

The Effect of Diode Laser With Different Parameters on Root Fracture During Irrigation Procedure

“…In this study, it was found that the noninstrumented group had higher resistance than other prepared and filled groups. This finding is compatible with previous studies (9,27).…”

Evaluation of the effect of different root canal obturation techniques using two root canal sealers on the fracture resistance of endodontically treated roots

“…In the work conducted by Teixeira (2004) statistically significant difference was not reported in the comparison of the fracture resistance between the teeth filled with cold lateral condensation or vertical condensation regardless of whether the root canal filling material was gutta‐percha or resilon (Teixeira et al, ). It was reported that there was not any significant difference in the comparison of fracture resistance between the cold lateral condensation, System B and Thermafill by using AH 26 and it was reported that these techniques did not increase the root fracture resistance of teeth significantly (Topcuoglu et al, ).…”

Fracture Resistance of Roots After Canal Preparation by Two Methods and Obturated by Different Techniques

“…Studies showed that preparation weakens roots and makes teeth susceptible to vertical fracture is supported by previous studies. (21,22) In this study, canals prepared with step-back technique using standardized K-files created a taper of 0.02 in the apical third of the canal, whereas Helix rotary NiTi files created taper of 0.06, while the ProTaper variable taper within the same file. The ProTaper created a taper of 0.09 in apical third of the canal.…”