Year : 2020

Volume : Volume 11

Issue : Issue 1

Address for correspondence :
Dr. Ruchi Patel.
drruchibpatel@gmail.com

Abstract

Background:  A common clinical problem confronting Prosthodontists is the design and maintenance of bilateral distal extension removable partial denture [RPD], as support is required from the teeth, the mucosa and underlying residual alveolar ridges. Distal extension removable partial denture (RPD) can cause stress on supporting hard tissues and abutment teeth, which may lead to harmful effects. There has been concern over the control of these destructive forces.1 The direction of the force on an abutment should be along the long axis of the teeth, so that the potential for tilting and torqueing of the abutment teeth would be minimized.2, 3 In the bilateral distal extension RPD, the functional force applied to the denture base creates an axis of rotation around the most distal abutment teeth and causes lateral and torqueing forces on these teeth. This problem occurs mainly in the mandible since it has less supporting tissue.4 There are three types of stresses that are induced on the abutment teeth by a bilateral distal extension RPD as vertical, horizontal and oblique stresses. In all types of stresses, abutment becomes a fulcrum. Therefore, mechanical and biomechanical aspects are generally agreed to be significant, particularly during the planning of restorative treatments and design of prosthetic appliance.4  This is an invitro study which uses Finite Element Analysis to determine and compare the stress distribution in Conventional and Mini Implant Supported Distal Extension Removable Partial Denture.

Keywords: Fenite element, stress distribution, implants.