Effect of non-axial implant loading on maxillary anterior region with different bone density. A 3-dimensional finite element analysis.
Journal Title: International Journal of Medical Science and Innovative Research (IJMSIR) - Year 2018, Vol 3, Issue 1
Abstract
Background: Biochemical factors play a substantial role in implant success or failure. Application of occlusal forces induces stresses and strain within the implant prosthesis complex and affects the bone remodelling process around the implant. Off axis force which is common during normal mastication would appear to induce more stress than does axial force. In case where aesthetics require tooth overlap in the anterior region, off axis loading of implant is usually unavoidable. Objectives: the purpose of this study is to evaluate the influences of stress and strain distribution in bone around anterior maxillary implant using 2 type of bone and 3 different loading angle Materials and methods: A 3 D finite element model was made of the anterior maxilla using the details from a CT scan, using computer software (ANSYS 11). A simulated 13 x 4.2 mm implant was placed in the centre of the bone and it suprerstructure were created. Six different testing conditions incorporating 2 type of cancellous bone( high and low density ) under 3 different loading angles( 0, 30 , 60 degree) relative to long axis of the implant were applied.. The stress and strain generated in the cortical and cancellous bone around the implant was recorded and evaluated with the help of ANSYS. Results: The maximum equivalent stress/strain increased linearly with the increase of loading angle. In addition to loading angle, bone quality also influenced resultant stress distribution. For low density bone model a substantial strain in the cancellous bone was found. Conclusion: to achieve a favorable prognosis under off axis loading of an anterior maxillary implant, careful case selection for appropriate bone quality and precise occlusal adjustment should be attempted to optimally direct occlusal force toward the long axis of the implant.
Authors and Affiliations
Dr. Vivek Lath
Keywords
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