Simulation of the mechanical interlocking capacity of a rough bone implant surface during healing
Journal article, 2015

Background: When an implant is inserted in the bone the healing process starts to osseointegrate the implant by creating new bone that interlocks with the implant. Biomechanical interlocking capacity is commonly evaluated in in vivo experiments. It would be beneficial to find a numerical method to evaluate the interlocking capacity of different surface structures with bone. In the present study, the theoretical interlocking capacity of three different surfaces after different healing times was evaluated by the means of explicit finite element analysis. Methods: The surface topographies of the three surfaces were measured with interferometry and were used to construct a 3D bone-implant model. The implant was subjected to a displacement until failure of the bone-to-implant interface and the maximum force represents the interlocking capacity. Results: The simulated ratios (test/control) seem to agree with the in vivo ratios of Halldin et al. for longer healing times. However the absolute removal torque values are underestimated and do not reach the biomechanical performance found in the study by Halldin et al. which might be a result of unknown mechanical properties of the interface. Conclusion: Finite element analysis is a promising method that might be used prior to an in vivo study to compare the load bearing capacity of the bone-to-implant interface of two surface topographies at longer healing times.

Biomechanics

Bone healing

FEA

Bone-to-implant interface shear strength

Author

A. Halldin

Malmö university

DENTSPLY Implants

Mats Ander

Chalmers, Applied Mechanics, Material and Computational Mechanics

M. Jacobsson

Malmö university

S. Hansson

DENTSPLY Implants

BioMedical Engineering Online

1475-925X (ISSN)

Vol. 14 1 45

Subject Categories

Medical Materials

DOI

10.1186/s12938-015-0038-0

More information

Latest update

10/27/2021