Study and characterization of the crest module design: A 3D finite element analysis

The Journal of Prosthetic Dentistry
Cristiana CostaSandra Carvalho

Abstract

The importance of the crest module design in the cortical bone region triggered a need to understand its geometry and its influence on stress management and bone stimulation. The purpose of this study was to determine the effect of different crest module designs in the cortical bone region in terms of critical stress distribution and bone stimulation. Several 3-dimensional finite element analyses were conducted of a mandibular cross section with osseointegrated dental implants. For the numerical models, different crest module designs (cylindrical, divergent, convergent, and cup shaped) were analyzed. An average value of a maximum occlusal load of 250 N was applied to each dental implant design, 30 degrees from the top surface. The concentration and distribution patterns of principal and maximum shear stresses and strains were obtained and analyzed. According to the comparative finite element analyses, the most pathologic stress and strain peaks around the implant collar in the cortical bone region were found in divergent crest modules with angles 14 degrees or larger. Nevertheless, the highest physiologic peaks of passive bone stimulation through compression, and the lowest tensile and shear stresses and strains in the cortical...Continue Reading

References

Jan 1, 1975·Journal of Biomechanics·D T Reilly, A H Burstein
Jul 14, 2004·Clinical Oral Implants Research·Dominic O'SullivanNeil Meredith
Aug 28, 2009·Clinical Oral Implants Research·Heba AbuhusseinHom-Lay Wang
Nov 15, 2011·Annals of Anatomy = Anatomischer Anzeiger : Official Organ of the Anatomische Gesellschaft·Julian BoldtErnst-Jürgen Richter
Aug 28, 2012·Dental Materials : Official Publication of the Academy of Dental Materials·Yasufumi YamanishiHirofumi Yatani

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