A finite element study on stress distribution of two different attachment designs under implant supported overdenture

Abstract

Locator and ball and socket attachments induce equivalent stresses on bone surrounding implants. Locator attachment performance was superior to that of the ball and socket attachment in the implants, nylon caps, and overdenture. Locator attachments are highly recommended and can increase the interval between successive maintenance sessions.

A Comparative Evaluation of Stress Distribution with Two Attachment Systems of Varying Heights in a Mandibular Implant‐Supported Overdenture: A Three‐Dimensional Finite Element Analysis

“…Such a result is seen due to the higher Young's modulus of elasticity and density of the cortical bone as compared to the spongy bone. This is in agreement with several studies that show higher stress concentration in the compact bone around the implants as compared to the trabecular bone …”

“…The matrix‐patrix relationship in the Locator attachment has been suggested as a possible reason for such results. The ball neck absorbs greater energy and therefore, a reduction in the amount of energy transferred to the implant is seen …”

“…The point of load application was chosen to be at the first molar, as the maximum forces are concentrated in this region . Loading in the molar area with a fixed implant in the canine area will also result in complex stress tensors, including tensile/compressive, shear, and bending stresses . As stated in earlier studies load magnitude was chosen to be 100 N, which was found to be the mean biting force in this region.…”

“…Stress within dental structures has been analyzed with several methods such as mechanical stress analysis, photo‐elasticity, and strain measurement; however, all these methods have a few disadvantages. Finite element analysis (FEA) is an important analytical tool in implant dentistry and has numerous benefits including precise modeling of complex structures, ability to make modifications after modeling, and representation of internal stress under varied application of loads by quantitatively assessing the data at any site within the mathematical model …”

Effects of Dental Implant-abutment Interfaces on the Reliability of Implant Systems

“…Many factors may influence the success of dental implantation; however, the reliability of the implant system itself is one of the most important [1][2][3][4]. At present, a dental implant system is generally assembled of the implant, the abutment and the central screw, forming a two-part structure.…”