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Effect of Macro-Design of Immediately Loaded Implants on Micromotion and Stress Distribution in Surrounding Bone Using Finite Element Analysis Publisher Pubmed



Fazel A1 ; Aalai S2, 4 ; Rismanchian M3
Authors
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Authors Affiliations
  1. 1. Associate Department of Prosthodontics, Faculty of Dentistry, Tehran University of Medical Sciences, Tehran, Iran
  2. 2. Assistant of Prosthodontics, Faculty of Dentistry, Qazvin University of Medical Sciences, Tehran, Iran
  3. 3. Associate Department of Prosthodontics, Faculty of Dentistry, Isfahan University of Medical Sciences, Isfahan, Iran
  4. 4. Faculty of Dentistry, Ghazvin, Shahid Bahonar Avenue, Iran

Source: Implant Dentistry Published:2009


Abstract

Objective: Macro-design influences the initial stability of implant and reduces micromotions. The aim of this study was to determine and compare micromotions and stress distribution in the bone around immediately loaded Maestro and Xive implants using finite element analysis. MATERIALS: In this experimental study, accurate, clear photos were prepared of Xive and Maestro implants 12 and 13 mm long and 4 and 3.8 mm in diameter, respectively, using a Nikon Digital Camera with a resolution 5.24-megapixels with 8× Optical Zoom and 4× Digital Zoom. After accurate measurements, 3-D models of the implants inside the lower mandible (D2) were processed in Solidworks Version 2003 environment and transferred into Ansys for finite element analysis. After loading of 500 N angled at 70 degrees from the horizontal plane, the micromotion of the implant and Von Misses stresses around the bone were measured. RESULTS: The measured micromotion in Maestro implant was 148 μm and that in Xive was 284 μm. Stress distribution in the bone surrounding Maestro implant was better than Xive, but maximum stress surrounding Xive implants (30 MPa) was lower than Maestro (33 MPa). CONCLUSION: Based on the results obtained in the present study, maximum micromotion in maestro was less than that in Xive implants. This finding can guarantee the application of maestro implants for immediate loading. © 2009 Lippincott Williams & Wilkins, Inc.
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