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Particle Size Distribution of Food Boluses after Mastication of Six Natural Foods

Institut National de la Recherche Agronomique, Theix, Station de Recherches sur la Viande, Saint-Genès-Champanelle, France; and GEDIDO, Groupe d’Etude sur les Déficiences Incapacités et Désavantages en santé orale, Faculté Dentaire, 11 Bd C De Gaulle, 63000 Clermont-Ferrand, France;

View larger version (24K): [in a new window]   Figure 1. Mean distribution of the particles (% of the initial weight among the sieves). The particle distributions in the boluses obtained after a complete chewing sequence (Sieve-Bolus1, n = 20), a half of a sequence (Sieve-Bolus3, n = 10), and one-quarter of a sequence (SieveBolus4, n = 10) differentiate the dry foods (A,B,C) from the vegetables (D,E,F).

View larger version (22K): [in a new window]   Figure 2. Laser diffraction analysis of expectorated boluses obtained for the different foods (Laser-Bolus1). Means (± SD) of the cumulative mass of particles are presented for each of the 17 diameter classes of particles. Means are expressed as the percentage of the total mass analyzed by laser diffraction (n = 20).

View larger version (22K): [in a new window]   Figure 3. Particle size distribution of food (% of the total weight before mastication). The values of this composite diagram were calculated from results obtained with laser diffraction and sieving methods.