Effect of alveolar bone support on zygomatic implants: a finite element analysis study

• Published in: International journal of oral and maxillofacial surgery Vol. 42; no. 5; pp. 671 - 676
• Main Authors: Freedman, M, Ring, M, Stassen, L.F.A
• Format: Journal Article
• Language: English
• Published: Denmark Elsevier Ltd 01.05.2013
• Subjects: Adult; Alveolar Process - physiology; Alveolar Process - surgery; Biomechanical Phenomena; Bite Force; Computer Simulation; Dental Implants; Dental Materials - chemistry; Dental Prosthesis, Implant-Supported; Dentistry; Denture, Partial, Fixed; Elastic Modulus; FEA; Female; Finite Element Analysis; Humans; Image Processing, Computer-Assisted - methods; Imaging, Three-Dimensional - methods; Maxilla - physiology; Maxilla - surgery; Models, Biological; stress distribution; Stress, Mechanical; Surgery; Titanium - chemistry; Tomography, X-Ray Computed - methods; Zygoma - physiology; Zygoma - surgery; zygomatic implants; zygomatic implants; stress distribution; FEA; finite element analysis
• ISSN: 0901-5027; 1399-0020
• DOI: 10.1016/j.ijom.2012.12.006

Abstract The objective of this study was to investigate the influence of maxillary alveolar bone on the stress distribution of zygomatic implants. A three-dimensional finite element model was created of half of a skull. Two zygomatic implants were modelled, placed in the skull supported by the zygomatic bone and the maxillary alveolar bone and connected by a fixed bridge. This model was duplicated, and the area of the maxillary alveolar bone supporting the implants was removed. Occlusal and lateral forces were applied to both models and the maximum von Mises stresses were recorded. Higher maximum stresses were noted in the model with no alveolar support. Occlusal stresses were higher than lateral stresses in the model with no alveolar support. Low stresses were noted in the zygomatic bone in both models. In conclusion, maxillary alveolar bone support is beneficial in the distribution of forces for zygomatic implants.