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Bone Remodeling01:40

Bone Remodeling

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Bone remodeling is a continuous and balanced process of bone resorption by osteoclasts and bone formation by osteoblasts. In adults, it helps maintain bone mass and calcium homeostasis. While mechanical stress can stimulate turnover as part of the normal maintenance and reparative process, several hormones also regulate bone remodeling.
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Numerical Simulation of Mandible Bone Remodeling under Tooth Loading: A Parametric Study.

Kangning Su1, Li Yuan2, Jie Yang3

  • 1Department of Mechanical Engineering, Pennsylvania State University, University Park, PA, USA.

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|October 19, 2019
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This study modeled adaptive bone remodeling in the mandible, finding that boundary conditions significantly impact bone density distribution. Higher mechanical stimulus levels lead to lower average bone density at convergence.

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Area of Science:

  • Biomechanics
  • Computational Biology
  • Orthopedics

Background:

  • Bone remodeling is a crucial adaptive response to mechanical stimuli.
  • Numerical algorithms model adaptive bone remodeling for orthopedic and dental applications.

Purpose of the Study:

  • To investigate the influence of model parameters on computed apparent bone density in the mandible under chewing and biting forces.
  • To analyze the impact of boundary conditions, initial density, and mechanical stimulus reference values on bone remodeling outcomes.

Main Methods:

  • Utilized numerical algorithms incorporating an equilibrium (lazy) zone and saturated density change rates for stable convergence.
  • Simulated adaptive bone remodeling in the mandible under normal chewing and biting loads.
  • Conducted a parametric study varying boundary conditions, initial density values, and reference mechanical stimulus.

Main Results:

  • Boundary conditions significantly altered bone density distribution at convergence, except near load application points.
  • Model sensitivity to initial density values was low, yielding similar but not identical converged bone density.
  • Higher reference mechanical stimulus values resulted in lower average bone density at convergence.
  • Equilibrium zone width had minimal effect on average density but reduced the extent of extreme density areas.

Conclusions:

  • Boundary conditions are a critical factor in simulating mandibular bone remodeling.
  • The choice of initial density has a limited impact on the final bone density distribution.
  • Mechanical stimulus levels and equilibrium zone parameters influence bone density outcomes, suggesting avenues for refining computational models for better in vivo data agreement.