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Logo of hnoBioMed CentralBiomed Central Web Sitesearchsubmit a manuscriptregisterthis articleHead & Neck OncologyJournal Front Page
Head Neck Oncol. 2010; 2(Suppl 1): O22.
Published online 2010 October 29. doi:  10.1186/1758-3284-2-S1-O22
PMCID: PMC3007695

Numerical analysis of costal cartilage warping after laser modification

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 an Nd:YAG laser (lambda=1.32 µm) at various exposure settings, grafts harvested from the peripheral regions of porcine costal cartilage were irradiated. The resulting graft geometry was fitted to a curve using a quadratic regression model. The coefficient of determination 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.

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