A Comparative Evaluation of Effect of Different Ferrule Heights on Stress Distribution in Endodontically Treated Teeth Restored with Zirconia Post and Core System using 3D-Finite Element Analysis

Gatkal, Vidya Satish; Jankar, Ajit; Joteppa, Varsha Vaijnath; Zafar, Asim; Nakade, Prashant; Wadhwani, Madhuri

doi:10.7860/jcdr/2021/51818.15785

Cited by 1 publication

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“…Stress analysis of ETT with ferrule has revealed reduced stress levels at the cervical region in some studies [ 45 , 46 ] which coroborates the obtained results of this study. Although others reported the shift of Von mises stress from the midroot and apex to the cervical region [ 14 , 47 ]. In the current study, fracture occurred mainly in the middle third of the roots in the BF and CF groups.…”

Section: Discussionmentioning

confidence: 99%

“…Finite element studies have shown that the stress concentration is in the cervical region of ETT restored with post-crown and the ferrule effect has a positive role in reducing the stress level. Also, it has been reported that presence of ferrule results in favorable stress distribution in root [11][12][13][14][15][16]. The minimum required height for the remaining tooth structure should be 2 mm from the finish line to the tooth/core interface; it should be circumferential and include all four axial walls to provide a ferrule effect [17].…”

Section: Introductionmentioning

confidence: 99%

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Effect of Ferrule Location on Fracture Resistance of Maxillary Premolars: An In Vitro Study

Koosha,

Jebelizadeh,

Mostafavi

2023

International Journal of Dentistry

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Objectives. The present study aimed to assess the effect of ferrule location on fracture resistance of maxillary premolars. Materials and Methods. A total of 72 extracted human maxillary premolars were selected and randomly assigned to six groups (n = 12 in each) considering ferrule location: circumferential ferrule (CF), without ferrule (WF), buccal ferrule (BF), lingual ferrule (LF), mesial ferrule (MF), and buccal–lingual ferrule (BLF). Cast posts were cemented into the prepared post spaces. Following conventional impression, Ni–Cr crowns were cemented to the specimens. After thermocycling (5,000 cycles, 5–55°C), the specimens were loaded at 45° in a universal testing machine until fracture. Data were analyzed with one-way ANOVA, Kolmogorov–Smirnov, and Tamhane tests. Results. The maximum and minimum mean fracture resistance were related to the CF (1,143.84 N) and WF (514.89 N) groups, respectively, ( P = 0.039 ). Fracture resistance in the BF (933.67 N) and BLF (874.01 N) groups was significantly higher than in the MF group (617.54 N) ( P = 0.001 ). There was no significant difference between the MF, LF (722.89 N), and WF groups in terms of fracture resistance ( P > 0.05 ). Conclusion. Teeth with CF showed maximum fracture resistance. The location of the ferrule effects on the fracture resistance of maxillary premolars and also the mode of failure.

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Section: Discussionmentioning

confidence: 99%