The Journal of Advanced Prosthodontics

The Korean Academy of Prosthodonitics (대한치과보철학회)
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Stress distribution of oval and circular fiber posts in amandibular premolar: a three-dimensional finite element analysis

  • Er, Ozgur (Department of Endodontics, Faculty of Dentistry, Erciyes University) ;
  • Kilic, Kerem (Department Prosthodontics, Faculty of Dentistry, Erciyes University) ;
  • Esim, Emir (Department of Mechanical Engineering, Faculty of Engineering, Erciyes University) ;
  • Aslan, Tugrul (Department of Endodontics, Faculty of Dentistry, Erciyes University) ;
  • Kilinc, Halil Ibrahim (Department Prosthodontics, Faculty of Dentistry, Erciyes University) ;
  • Yildirim, Sahin (Department of Mechanical Engineering, Faculty of Engineering, Erciyes University)
  • Received : 2013.05.16
  • Accepted : 2013.10.18
  • Published : 2013.11.30
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Abstract

PURPOSE. The aim of the present study was to evaluate the effects of posts with different morphologies on stress distribution in an endodontically treated mandibular premolar by using finite element models (FEMs). MATERIALS AND METHODS. A mandibular premolar was modeled using the ANSYS software program. Two models were created to represent circular and oval fiber posts in this tooth model. An oblique force of 300 N was applied at an angle of $45^{\circ}$ to the occlusal plane and oriented toward the buccal side. von Mises stress was measured in three regions each for oval and circular fiber posts. RESULTS. FEM analysis showed that the von Mises stress of the circular fiber post (426.81 MPa) was greater than that of the oval fiber post (346.34 MPa). The maximum distribution of von Mises stress was in the luting agent in both groups. Additionally, von Mises stresses accumulated in the coronal third of root dentin, close to the post space in both groups. CONCLUSION. Oval fiber posts are preferable to circular fiber posts in oval-shaped canals given the stress distribution at the postdentin interface.

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References

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