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Activity Number:
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215
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Type:
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Contributed
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Date/Time:
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Tuesday, August 13, 2002 : 12:00 PM to 1:50 PM
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Sponsor:
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Biometrics Section*
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| Abstract - #300850 |
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Title:
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Smoothing Techniques to Estimate the Functional Width of a Biomaterials Interface
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Author(s):
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Stuart Gansky*+ and Robert Wilson and Sally Marshall and Grayson Marshall
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Affiliation(s):
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University of California, San Francisco and University of California, San Francisco and University of California, San Francisco and University of California, San Francisco
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Address:
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3333 California St, Suite 495, San Francisco, California, 94143-1361, USA
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Keywords:
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spline ; loess ; bootstrap ; dental
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Abstract:
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A recent study of mechanical properties of the dentinoenamel junction (DEJ) of the human tooth (Marshall et al, 2001) sought to estimate the width of the interface of two dissimilar materials based on nanohardness and elastic modulus measurements. Here, we study the statistical techniques used for that estimation, including restricted cubic splines, local polynomial regression (loess), confidence-bound estimation, and bootstrapping. Piecewise linear models are used to simulate data with a plain, rising slope, and plateau with a known horizontal distance (width) between the plain and plateau and varying amounts of error. Techniques to estimate this width are compared to assess bias. Support: NIH/NIDCR R01DE13029, P60 DE13058
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- Authors who are presenting talks have a * after their name.
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