Finite element analysis of a customized implant in PMMA coupled with the cranial bone

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Abstract

This computational study investigates the effect of the Von Misses stresses and deformations distribution generated by coupling a customized cranial implant with its fixation system for anchoring in the cranial bone of a specific patient. Three simulations were carried out under static loads, in different areas of the implant and during the rest-activity; and another three simulations were considered preset maximum intracranial pressures. Anatomical models were obtained by computed tomography. The design of the device to be implanted was carried out by applying reverse engineering processes, from the corresponding computer-aided design (CAD) model of the bone structure of interest. Likewise, the anchoring system was modeled in detail. Loads were applied at three points on the custom implant. The stress distribution on the artificial plate and the implant-natural bone interface was analyzed. The distribution of the stresses caused by the internal load states on the plate and the anchoring system was also studied. The neurocranial reconstruction with the customized polymethylmethacrylate (PMMA)-based implant and the finite element analysis demonstrated that the fixation and coupling system of the bone-implant interface guarantees adequate protection for the internal structures of the restored area. In addition, the custom-designed and placed implant will not cause non-physiological harm to the patient. Nor will failures occur in the anchoring system.

Original languageEnglish
Article number106046
JournalJournal of the Mechanical Behavior of Biomedical Materials
Volume146
DOIs
StatePublished - Oct 2023

Bibliographical note

Funding Information:
The authors of this work appreciate the support provided by the Research Group on New Materials and Transformation Processes (GIMAT) of the Mechanical Engineering Carrier, in terms of the availability of hours to carry out the research processes. The authors also appreciate the support provided by the Neurosurgery Department of Society for the Fight Against Cancer, SOLCA Cancer Institute, Cuenca, Azuay, Ecuador, which provided its facilities for performing the surgery and patient follow-up. This research was supported by the Salesian Polytechnic University, Cuenca, Ecuador [RESOLUCIÓN No. 002-003-2020-07-15], and [RESOLUCIÓN No. 005-005-2023-05-25].

Funding Information:
This research was supported by the Salesian Polytechnic University, Cuenca, Ecuador [RESOLUCIÓN No. 002-003-2020-07-15 ], and [RESOLUCIÓN No. 005-005-2023-05-25 ].

Publisher Copyright:
© 2023 Elsevier Ltd

Keywords

  • Anatomical model
  • Polymethylmethacrylate
  • Von Misses stress
  • Humans
  • Prostheses and Implants
  • Stress, Mechanical
  • Polymethyl Methacrylate
  • Biomechanical Phenomena
  • Bone-Implant Interface
  • Dental Stress Analysis
  • Finite Element Analysis
  • Skull
  • Dental Implants

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