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Evaluating the Surface Topography of Pyrolytic Carbon Finger Prostheses through Measurement of Various Roughness Parameters

Lookup NU author(s): Dr Andrew Naylor, Professor Tom Joyce



This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0).


The articulating surfaces of four different sizes of unused pyrolytic carbon proximal interphalangeal prostheses (PIP) were evaluated though measuring several topographical parameters using a white light interferometer: average roughness (Sa); root mean-square roughness (Sq); skewness (Ssk); and kurtosis (Sku). The radii of the articulating surfaces were measured using a coordinate measuring machine, and were found to be: 2.5, 3.3, 4.2 and 4.7 mm for proximal, and 4.0, 5.1, 5.6 and 6.3 mm for medial components. ANOVA was used to assess the relationship between the component radii and each roughness parameter. Sa, Sq and Ssk correlated negatively with radius (p = 0.001, 0.001, 0.023), whilst Sku correlated positively with radius (p = 0.03). Ergo, the surfaces with the largest radii possessed the better topographical characteristics: low roughness, negative skewness, high kurtosis. Conversely, the surfaces with the smallest radii had poorer topographical characteristics.

Publication metadata

Author(s): Naylor A, Talwalkar SC, Trail IA, Joyce TJ

Publication type: Article

Publication status: Published

Journal: Journal of Functional Biomaterials

Year: 2016

Volume: 7

Issue: 2

Online publication date: 14/04/2016

Acceptance date: 11/04/2016

Date deposited: 12/05/2016

ISSN (electronic): 2079-4983

Publisher: MDPI AG


DOI: 10.3390/jfb7020009


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