title: Evaluation of Temperature and Stress Distribution on 2 Different Post Systems Using 3-Dimensional Finite Element Analysis.
abstract: BACKGROUND The mouth is exposed to thermal irritation from hot and cold food and drinks. Thermal changes in the oral cavity produce expansions and contractions in tooth structures and restorative materials. The aim of this study was to investigate the effect of temperature and stress distribution on 2 different post systems using the 3-dimensional (3D) finite element method. MATERIAL AND METHODS The 3D finite element model shows a labio-lingual cross-sectional view of the endodontically treated upper right central incisor and supporting periodontal ligament with bone structures. Stainless steel and glass fiber post systems with different physical and thermal properties were modelled in the tooth restored with composite core and ceramic crown. We placed 100 N static vertical occlusal loading onto the center of the incisal surface of the tooth. Thermal loads of 0°C and 65°C were applied on the model for 5 s. Temperature and thermal stresses were determined on the labio-lingual section of the model at 6 different points. RESULTS The distribution of stress, including thermal stress values, was calculated using 3D finite element analysis. The stainless steel post system produced more temperature and thermal stresses on the restorative materials, tooth structures, and posts than did the glass fiber reinforced composite posts. CONCLUSIONS Thermal changes generated stresses in the restorative materials, tooth, and supporting structures.
authors.affiliation: Department of Prosthodontics, School of Dentistry, University of Dicle, Diyarbakır, Turkey.
authors.forename: Yalçın
authors.initials: Y
authors.lastname: Değer
authors.affiliation: Department of Endodontics, School of Dentistry, University of Dicle, Diyarbakır, Turkey.
authors.forename: Özkan
authors.initials: Ö
authors.lastname: Adigüzel
authors.affiliation: Department of Endodontics, School of Dentistry, University of Adnan Menderes, Aydın, Turkey.
authors.forename: Senem
authors.initials: S
authors.lastname: Yiğit Özer
authors.affiliation: Department of Endodontics, School of Dentistry, University of Dicle, Diyarbakır, Turkey.
authors.forename: Sadullah
authors.initials: S
authors.lastname: Kaya
authors.affiliation: Department of Prosthodontics, School of Dentistry, University of Dicle, Diyarbakır, Turkey.
authors.forename: Zelal
authors.initials: Z
authors.lastname: Seyfioğlu Polat
authors.affiliation: School of Dentistry, University of Dicle, Diyarbakır, Turkey.
authors.forename: Bejna
authors.initials: B
authors.lastname: Bozyel
mesh_terms: D001831:Body Temperature; D003430:Cross-Sectional Studies; D015921:Dental Implants; D003764:Dental Materials / Q000032:analysis / Q000737:chemistry*; D003776:Dental Porcelain / Q000032:analysis / Q000737:chemistry; D017267:Dental Prosthesis Design / Q000379:methods*; D020342:Finite Element Analysis; D006801:Humans; D007180:Incisor / Q000737:chemistry; D008953:Models, Anatomic; D013314:Stress, Mechanical
chemical_list: D015921:Dental Implants; D003764:Dental Materials; D003776:Dental Porcelain