Mastication


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Mastication

 

the mechanical processing of food in the oral cavity; consists of grinding and mixing the food with saliva. The process entails the biting off of food and mashing, crushing, and grinding it between the teeth. In animals, including man, mastication is accomplished by vertical, front-to-back, and lateral movements of the lower jaw in relation to the upper jaw, brought about by the contraction of the masticatory muscles. Movements of the tongue and cheeks, which shift the food around the oral cavity, are of auxiliary significance. Considerable pressure is exerted on the teeth during mastication.

Mastication is a complex coordinated action, regulated by a special nerve center in the medulla oblongata and also by the subcortical and cortical sections of the cerebral hemisphere. Damage to the masticatory apparatus, particularly anodontia or tooth disorders, interferes with the normal processing and assimilation of food and may cause disorders in the digestive tract.

References in periodicals archive ?
Mastication is carried out by a machine that shreds woody materials on the surface, reducing the height and vertical continuity of fuels but leaving the masticated material on-site as a compact layer of surface fuel.
The feeding, rumination, mastication, and resting time values (min/d) did not reflect any significant effect of the diets with regard to feeding, ruminating, masticating, and resting activities (Table 3).
During mastication, saliva is mixed with the food to help break it down for swallowing and to start digestion of carbohydrates.
Before making any decision on the time of mastication, we studied the influence of mastication time on the tensile properties of NR at different dose values (Fig.
The concentrations of the buffering agent and the calcium preparation are selected to provide a Ca/P ratio in the saliva after mastication that is substantially 1.
Stone published a Special Edition, Zombie Men, eDating and Mastication.
Elle se caracterise par l'apparition de lesions qui entraEnent une salivation intense et filante (signe caracteristique de la maladie), des troubles de la mastication, des boiteries et des chutes de production laitiere.
But perhaps Cheryl Gillan can confirm what discussions David Cameron held with her in order to ascertain the view of Wales prior to his mastication on the European stage?
Once treated, emphasis must be placed upon prevention of recurrence, which includes patient education and meticulous mastication.
The engrafted bioengineered tooth displayed physiological tooth functions such as mastication, periodontal ligament function for bone remodeling and responsiveness to noxious stimulations.
This shift to a softer diet would require sharper, higher-crowned cusps for adequate mastication as compared to those needed for crushing harderbodied foods.
He thought hard before declaring: "It's probably a matter of simply teaching you some mastication techniques.