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Open Access Publications from the University of California

Numerical analysis of costal cartilage warping after laser modification

  • Author(s): Foulad, A
  • Manuel, C
  • Kim, J
  • Wong, BJF
  • et al.

Published Web Location Commons 'BY' version 4.0 license

Grafts obtained from peripheral regions of costal cartilage have an inherent tendency to warp over time. Laser irradiation provides a potential method to control the warping process, thus yielding stable grafts for facial reconstructive surgery. In our current study, we propose a simple and well-fitting model that numerically describes the degree of warping of laser irradiated costal cartilage grafts. Using a Nd:YAG laser (λ=1.32μm) at various exposure settings, grafts harvested from the peripheral regions of porcine costal cartilage were irradiated. The resulting graft geometry was objectively fitted to a curve using a quadratic regression model. The coefficient of determination (R2) demonstrated a very strong fit for all grafts modeled. A quadratic regression is simple to perform and results in a single numerical value that appropriately describes the degree of cartilage warping. Our proposed model is valuable in assessing the effect of laser irradiation on the warping process of costal cartilage. © 2010 Copyright SPIE - The International Society for Optical Engineering.

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