Pradeep Kumar1, R Nageswar Rao2. 1. Department of Conservative Dentistry and Endodontics, Yenepoya Dental College, Mangalore, Karnataka, India. 2. Department of Conservative Dentistry and Endodontics, Shri Dharmasthala Manjunatheshwara College of Dental Sciences, Dharwad, Karnataka, India.
Abstract
OBJECTIVE: To compare stress distribution in a tooth restored with metal and fiber posts of varying diameters (1.2 and 1.4 mm) by means of three-dimensional finite element analysis (3D-FEA). MATERIALS AND METHODS: Four 3D-FEA models were constructed: (1) fiber post (1.2 and 1.4 mm) and (2) metal post (1.2 and 1.4 mm). The material properties were assigned and a force of 100 N was applied at 45° angle to the longitudinal axis of the tooth onto the palatal surface incisal to the cingulum. Analysis was run and stress distribution pattern was studied. RESULTS: Maximum stresses in the radicular tooth structure for fiber post were higher than that for metal post. In the former models, stresses in the tooth structure were slightly reduced with increase in fiber post diameter. CONCLUSIONS: To reduce stress in the remaining radicular tooth structure, it is better to use a fiber post of a large diameter.
OBJECTIVE: To compare stress distribution in a tooth restored with metal and fiber posts of varying diameters (1.2 and 1.4 mm) by means of three-dimensional finite element analysis (3D-FEA). MATERIALS AND METHODS: Four 3D-FEA models were constructed: (1) fiber post (1.2 and 1.4 mm) and (2) metal post (1.2 and 1.4 mm). The material properties were assigned and a force of 100 N was applied at 45° angle to the longitudinal axis of the tooth onto the palatal surface incisal to the cingulum. Analysis was run and stress distribution pattern was studied. RESULTS: Maximum stresses in the radicular tooth structure for fiber post were higher than that for metal post. In the former models, stresses in the tooth structure were slightly reduced with increase in fiber post diameter. CONCLUSIONS: To reduce stress in the remaining radicular tooth structure, it is better to use a fiber post of a large diameter.
Entities:
Keywords:
Fiber post; finite element analysis; metal post; post diameter
Authors: A Barjau-Escribano; J L Sancho-Bru; L Forner-Navarro; P J Rodríguez-Cervantes; A Pérez-Gónzález; F T Sánchez-Marín Journal: Oper Dent Date: 2006 Jan-Feb Impact factor: 2.440
Authors: Carla Santina de Miranda Coelho; João Carlos Gabrielli Biffi; Gisele Rodrigues da Silva; Anthony Abrahão; Roberto Elias Campos; Carlos José Soares Journal: Dent Mater J Date: 2009-11 Impact factor: 2.102