Analysis of the compressive strain below the removable and fixed prosthesis in the posterior mandible using a digital image correlation method

Abstract

It was the purpose of this study to determine and analyse strains in the bone of posterior mandible below the removable and fixed partial dentures using Digital Image Correlation Method. Dried mandible with shortened dental arch (Kennedy Class 1) was used in the experiment. The mandible model was prepared for accepting two types of restorations for bilaterally missing molars conventional therapy, and removable and fixed partial dentures were manufactured following standard prosthetic protocol. The models with prosthetic restorations placed in situ were subjected to loading of 50-300 N, and photographed using two digital cameras as part of the digital image correlation method equipment. Afterwards, the obtained data for strains within restored mandible during loading ciclus were analysed in the software Aramis and graphically presented. Percentage size of the mandible strains within the line section are from 0.14 to 0.19% for the removable partial denture experimental model and 0-0.14% for the fixed partial denture experimental model. The study has demonstrated that Digital Image Correlation method can be used to measure strain on the mandible surface and replacements during loading and that from biomechanical perspective both therapeutic modalities can be equally useful for the restoration of the mandible with bilaterally distal edentulous spaces.

An attempt to create a standardized (reference) model for experimental investigations on implant’s sample

“…Recent studies that were conducted in order to explain the utility, benefits and advantages of DIC over the other methods were mostly performed on in vitro models [12,13]. ''In vitro'' models can serve for studying the distribution of forces and for registration of deformations [14]. Consequently, an experimental model consisted of an implant placed on the PMMA was created in order to visualize the whole strain field of the tested materials [15].…”

Numerical Study of the Effect of Dental Implant Inclination

“…The intention in this study was to focus on the simpler loading conditions and to eliminate other systematical factors which arise due to the system complexity. Experimental stress and strain measurements of the human jaw and various models in the vicinity of the dental implant has been found in the literature (Markarian and Ueda 2007, Tanasic et al 2012a, Tanasic et al 2012b). 3D Finite element method (FEA) is an algebrabased computer simulation technique which has also been established as a reliable tool for analysis of different models.…”

Digital Image Correlation Analysis of Vertically Loaded Cylindrical Ti-Implants With Straight and Angled Abutments

“…16 consequential strain. 18 In this study, an experimental model consisting of an implant placed on the PMMA was created in order to visualize the whole strain field of the tested materials. 19 A limitation of this study was that it did not take bone into consideration, opposite to real physiological conditions.…”