Comparison of particle-size distributions determined by optical scanning and by sieving in the assessment of masticatory performance

• Verfasst von: Eberhard, Lydia [VerfasserIn]
• Verfasst von: Schindler, Hans J. [VerfasserIn]
• Verfasst von: Hellmann, Daniel [VerfasserIn]
• Verfasst von: Schmitter, Marc [VerfasserIn]
• Verfasst von: Rammelsberg, Peter [VerfasserIn]
• Verfasst von: Giannakopoulos, Nikolaos Nikitas [VerfasserIn]
• Titel: Comparison of particle-size distributions determined by optical scanning and by sieving in the assessment of masticatory performance
• Verf.angabe: L. Eberhard, H.J. Schindler, D. Hellmann, M. Schmitter, P. Rammelsberg & N.N. Giannakopoulos
• E-Jahr: 2012
• Jahr: 06 January 2012
• Umfang: 11 S.
• Fussnoten: Gesehen am 15.04.2019
• Titel Quelle: Enthalten in: Journal of oral rehabilitation
• Ort Quelle: Oxford [u.a.] : Wiley-Blackwell, 1974
• Jahr Quelle: 2012
• Band/Heft Quelle: 39(2012), 5, Seite 338-348
• ISSN Quelle: 1365-2842
• DOI: doi:10.1111/j.1365-2842.2011.02275.x
• Datenträger: Online-Ressource
• Sprache: eng
• Sach-SW: mastication
• Sach-SW: masticatory performance
• Sach-SW: optosil
• Sach-SW: scanning
• Sach-SW: sieving
• K10plus-PPN: 1663255539

Abstract

Aim of this study was to introduce a feasible and valid technique for the assessment of masticatory performance that is comparable to the standard sieving method. Twenty-one chewing samples (Optosil) comminuted by healthy dentate adults were analysed with a sieving and scanning method. Scanning was performed using a conventional flatbed scanner (1200 dpi). All scanned images underwent image analysis (ImageJ), which yielded descriptive parameters such as area, best-fitting ellipse for each particle. Of the 2D-image, a volume was estimated for each particle, which was converted into a weight. To receive a discrete distribution of particle sizes comparable to sieving, five chewing samples were used to calculate a size-dependent area-volume-conversion factor. The sieving procedure was carried out with a stack of 10 sieves, and the retained particles per sieve were weighed. The cumulated weights yielded by either method were curve-fitted with the Rosin-Rammler distribution to determine the median particle size x50. The Rosin-Rammler distributions for sieving and scanning resemble each other. The distributions show a high correlation (0·919-1·0, n = 21, P < 0·01, Pearson’s correlation coefficient). The median particle sizes vary between 3·83 and 4·77 mm (mean: 4·31) for scanning and 3·53 and 4·55 mm (mean: 4·21) for sieving. On average, scanning overestimates the x50 values by 2·4%. A modified Bland-Altman plot reveals that 95% of the x50 values fall within 10% of the average x50. The scanning method is a valid, simple and feasible method to determine masticatory performance.