Measurement uncertainty associated with chromatic confocal profilometry for 3D surface texture characterization of natural human enamel

Mullan, Francesca; Bartlett, David; Austin, Rupert

doi:10.1016/j.dental.2017.04.004

Cited by 17 publications

(15 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The NCP used in this study had a live video screen of the surface with a horizontal indicator line to identify the optimum focus and position the scanner. The scans from the NCP were automatically analysed using a custom designed macro program based on previously published protocols from our research group to extract Sa roughness using a Gaussian cut-off filter of 25 μm [3,26,27]. …”

Section: Methodsmentioning

confidence: 99%

Measurement of surface roughness changes of unpolished and polished enamel following erosion

Mullan

Austin

Parkinson³

et al. 2017

PLoS ONE

View full text Add to dashboard Cite

ObjectivesTo determine if Sa roughness data from measuring one central location of unpolished and polished enamel were representative of the overall surfaces before and after erosion.MethodsTwenty human enamel sections (4x4 mm) were embedded in bis-acryl composite and randomised to either a native or polishing enamel preparation protocol. Enamel samples were subjected to an acid challenge (15 minutes 100 mL orange juice, pH 3.2, titratable acidity 41.3mmol OH/L, 62.5 rpm agitation, repeated for three cycles). Median (IQR) surface roughness [Sa] was measured at baseline and after erosion from both a centralised cluster and four peripheral clusters. Within each cluster, five smaller areas (0.04 mm2) provided the Sa roughness data.ResultsFor both unpolished and polished enamel samples there were no significant differences between measuring one central cluster or four peripheral clusters, before and after erosion. For unpolished enamel the single central cluster had a median (IQR) Sa roughness of 1.45 (2.58) μm and the four peripheral clusters had a median (IQR) of 1.32 (4.86) μm before erosion; after erosion there were statistically significant reductions to 0.38 (0.35) μm and 0.34 (0.49) μm respectively (p<0.0001). Polished enamel had a median (IQR) Sa roughness 0.04 (0.17) μm for the single central cluster and 0.05 (0.15) μm for the four peripheral clusters which statistically significantly increased after erosion to 0.27 (0.08) μm for both (p<0.0001).ConclusionMeasuring one central cluster of unpolished and polished enamel was representative of the overall enamel surface roughness, before and after erosion.

show abstract

Section: Methodsmentioning

confidence: 99%

Measurement of surface roughness changes of unpolished and polished enamel following erosion

Mullan

Austin

Parkinson³

et al. 2017

PLoS ONE

View full text Add to dashboard Cite

show abstract

“…Baseline values for natural enamel indicate a complex textured surface, which is supported by visual evidence from the confocal images, thereby the effect of roughness change value is partly determined by the baseline values and the variation within the sample micro-structure. Natural enamel became significantly smoother after erosion whilst polished enamel became rougher, following recent trends [15,24,27,33]. These differences in behaviour between the two surfaces cannot be attributed to the differences in measurement capabilities and remain true representations.…”

Section: Discussionmentioning

confidence: 84%

“…There has recently been increased interest in investigating surface changes of natural enamel surfaces which are a more clinically relevant substrate [14,15,31,32]. However, difficulties have been identified specific to optical devices, whereby measurement drop out occurs over curvatures with push the angular tolerance of the device [25].…”

Section: Discussionmentioning

confidence: 99%

“…To simulate dietary wear an erosion model was designed to investigate surface roughness changes following in vitro exposure to dietary acid, based upon previously published protocols [14,27].…”

Section: Methodsmentioning

confidence: 99%

“…In vitro erosive tooth wear models normally employ polishing of enamel to remove the outer layer to reduce structural variations, and thus facilitate measurement [11]. However, this means the outer layer, which contains areas of aprismatic and prismatic enamel which is less susceptible to erosion [12][13][14][15][16], has been removed and therefore the erosion model maybe less clinically relevant.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Precision of 655 nm Confocal Laser Profilometry for 3D surface texture characterisation of natural human enamel undergoing dietary acid mediated erosive wear

Mullan

Mylonas

Parkinson³

et al. 2018

Dental Materials

Self Cite

View full text Add to dashboard Cite

This study demonstrates a method for precise surface texture measurement of natural human enamel. Measurement precision was superior for polished flat enamel in contrast to natural enamel however, natural enamel responds very differently to polished enamel when exposed to erosion challenges. Therefore, thus future studies characterising enamel surface changes following erosion on natural enamel may provide more clinically relevant responses in comparison to polished enamel.

show abstract

Evaluation of Wear Measurement with Radioactive Isotopes for DLC Coatings Affected by Abrasive Particles

et al. 2022

View full text Add to dashboard Cite

Diamond-like carbon (DLC) coatings protect engine parts from wear and provide low-friction. Unfortunately, the nature of DLC coatings does not allow progressing wear measurement using conventional methods. Therefore, we applied a radioactive isotope-based wear measurement method (RIC method). A tribometer with oscillating contact and one with sliding contact were used to provide different loading conditions. The RIC method was evaluated for DLC coatings, and the DLC wear was investigated regarding the presence of abrasive particles. The results indicate that an increase in abrasive particle concentration leads to an increase of DLC wear rate and a decrease in usage-time until wear-off.

show abstract

Measurement uncertainty associated with chromatic confocal profilometry for 3D surface texture characterization of natural human enamel

Cited by 17 publications

References 16 publications

Measurement of surface roughness changes of unpolished and polished enamel following erosion

Measurement of surface roughness changes of unpolished and polished enamel following erosion

Precision of 655 nm Confocal Laser Profilometry for 3D surface texture characterisation of natural human enamel undergoing dietary acid mediated erosive wear

Evaluation of Wear Measurement with Radioactive Isotopes for DLC Coatings Affected by Abrasive Particles

Contact Info

Product

Resources

About