Share Page:

Volume 28 , Issue 3
May/June 2013

Pages e151e160

Finite Element Analysis of Zygomatic Implants in Intrasinus and Extramaxillary Approaches for Prosthetic Rehabilitation in Severely Atrophic Maxillae

Muhammad Ikman Ishak, BEng/Mohammed Rafiq Abdul Kadir, PhD/Eshamsul Sulaiman, MClinDent/Noor Hayaty Abu Kasim, PhD

PMID: 23748334
DOI: 10.11607/jomi.2304

Purpose: To compare the extramaxillary approach with the widely used intrasinus approach via finite element method. Materials and Methods: A unilateral three-dimensional model of the craniofacial area surrounding the region of interest was developed using computed tomography image datasets. The zygomatic implants were modeled using three-dimensional computer-aided design software and virtually placed according to the described techniques together with one conventional implant and a prosthesis. The bone was assumed to be linear isotropic with a stiffness of 13.4 GPa, while the implants were of titanium alloy with a stiffness of 110 GPa. Masseter forces were applied at the zygomatic arch, and occlusal loads were applied to the surface of the prosthesis. The stresses and displacements generated on the surrounding bone and within the implant due to the simulated loading configuration were analyzed. Results: The bone-implant interface and zygomatic implant body for the intrasinus approach produced 1.41- and 4.27-fold higher stress, respectively, compared with the extramaxillary approach under vertical loading. However, under lateral loading, the extramaxillary approach generated 2.48-fold higher stress than the intrasinus at the bone-implant interface. The zygomatic implant in the extramaxillary approach had twofold higher micromotion than those with intrasinus approach under lateral loading. Conclusions: No one technique was found to be superior; however, if lateral loading is used, the intrasinus approach is the most favorable for the rehabilitation of severely atrophic maxillae. Int J Oral Maxillofac Implants 2013;28:e151e160. doi:10.11607/jomi.2304

Full Text PDF File | Order Article


Get Adobe Reader
Adobe Acrobat Reader is required to view PDF files. This is a free program available from the Adobe web site.
Follow the download directions on the Adobe web site to get your copy of Adobe Acrobat Reader.


© 2018 Quintessence Publishing Co, Inc JOMI Home
Current Issue
Ahead of Print
Author Guidelines
Submission Form
Quintessence Home
Terms of Use
Privacy Policy
About Us
Contact Us