Stress distribution in three unit fixed partial prosthesis with cast and prefabricated post and core: a biomechanical finite element analysis

  • Federico Latorre-Correa Universidad de Antioquia
  • Érica Janeth Saldarriaga-Quintero Universidad de Antioquia
  • César Iván Uribe-Díaz Universidad de Antioquia
  • Edwin Chica-Arrieta Universidad de Antioquia
Keywords: Cast post, Prefabricate post, Finite element

Abstract

Introduction: this study analyzes the behavior of stress distribution in three-unit fixed partial dentures (FPD) using a finite elements model (FEM). Methods: a canine and a central incisor were modeled; both of them were joined together by a FPD with a lateral incisor as pontic. Endodontic treatment with a 4 mm apical seal was simulated for abutment teeth; cast post and cores and prefabricated posts were modeled for abutments and a noble metal framework veneered with porcelain was used as the final restoration. For better precision, a three-dimensional model of supporting structures such as cortical bone, trabecular bone and periodontal ligament was designed. Software capable of showing the behavior of bodies when different mechanical properties are introduced to the system was used. Oblique loads of 1N in a 45° angle were applied on the cingulum area of both abutments and pontic which was intended to show the distribution of stress without failing. Results: the greatest strain was found on both the canine and central incisor dentine where fiber posts were used (0.92 N/mm2 cast post and core, 1.17 N/mm2 fiber post on the canine; 1.11 N/mm2 cast post and core, 1.92 N/mm2 fiber post for the central incisor). Conclusions: distribution of von Misses stress was found to be similar to that of single tooth. When rigid intraradicular elements were used, this element absorbs most of the energy. The decision of which element is better depends on different variables.

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Author Biographies

Federico Latorre-Correa, Universidad de Antioquia

Odontólogo, Especialista en Odontología Integral del Adulto, Profesor asistente Facultad de Odontología, Universidad de Antioquia

Érica Janeth Saldarriaga-Quintero, Universidad de Antioquia

Estudiante de posgrado de Odontología Integral del Adulto, Facultad de Odontología, énfasis en Prostodoncia, Universidad de Antioquia.

César Iván Uribe-Díaz, Universidad de Antioquia

Estudiante de posgrado de Odontología Integral del Adulto, Facultad de Odontología, énfasis en Prostodoncia, Universidad de Antioquia.

Edwin Chica-Arrieta, Universidad de Antioquia

Ingeniero Mecánico, Maestría en Ingeniería, Especialización en diseño mecánico, Profesor asistente Facultad de Ingeniería,  Universidad de Antioquia.

Published
2009-12-16
How to Cite
Latorre-Correa F., Saldarriaga-Quintero Érica J., Uribe-Díaz C. I., & Chica-Arrieta E. (2009). Stress distribution in three unit fixed partial prosthesis with cast and prefabricated post and core: a biomechanical finite element analysis. Revista Facultad De Odontología Universidad De Antioquia, 21(1), 33-41. Retrieved from https://revistas.udea.edu.co/index.php/odont/article/view/2164