Modeling of resistibility of the jaw bone tissues at the power load of orthodontic mini implants

Abstract

The objective of this study was to evaluate various types of stress in cortical and cancellous bone around miniscrew implants of different type using finite element analysis. Three types of constructions of the 8 mm long mini implants produced by different manufacturers АСR (Korea), PОМ (Russia) and OMG (own construction) were studied being inserted in the mathematical model of alveolar process at the 90o, 60o and 45o angles and two types of cortical bone thickness – 1 mm and 2 mm. All the models of the biomedical systems "bone-mini implant" have demonstrated the best distribution of strains at the 2 mm cortical plate thickness as compared to the 1 mm thickness. At the power loading the biomechanical system "bone-mini implant", the area of strains concentration does not depend on the type of the mini implant construction and is located in the region of compression deformation of the cortical jawbone medium. The OMG mini implants demonstrated the largest maximal force degrees to be applied to the mini screw as compared to other mini implants used in this experiment. Key words: mini implant, cortical and cancellous bone, stress distribution.