3D surface roughness of a partial free form dental surface after enamel loss due to acidic erosion using optical and X-Ray CT metrology

McBride, J.W., Mylonas, P. and Bull, T.G. 2023. 3D surface roughness of a partial free form dental surface after enamel loss due to acidic erosion using optical and X-Ray CT metrology. Metrology letters , ML005.

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Abstract

A partial human natural unprocessed dental sample was submerged in Citric Acid (0.3% pH.3.2), for 1 hour, without agitation, over a selected region (diameter 1.5 mm). The sample was measured using the TaiCaan XYRIS 2020 H instrument “before and after” the test and measured using X-Ray CT (XCT) in the “after” condition, for direct comparison with the optical measurement. The analysis of the sample was conducted using a 80 µm 3D gaussian filter to remove the surface form while maintaining the surface roughness. The 3 surfaces were compared and co-located to allow comparison of 3D surface roughness (Sa). A square region (0.6 x 0.6 mm) of the surface is segmented into 16 measurement regions (0.15 x 0.15 mm) and the roughness of each region compared. Results demonstrate that the “after” optical measurement shows a reduction of surface roughness proportional to the initial roughness of the surface. A comparison with the “after” XCT indicates a similar result to the optical data with a further reduction in roughness values when compared to the optical. We show that XCT generated surface data can be used to measure the surface changes on free form surfaces.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Schools > Dentistry
Date of First Compliant Deposit:	20 December 2023
Date of Acceptance:	23 May 2023
Last Modified:	30 Jul 2025 11:30
URI:	https://orca.cardiff.ac.uk/id/eprint/165000

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