The study sample consisted of 1288 independently living people aged 60?4 years. Masticatory performance was determined by the comminuted particles of test food. Bilateral maximal occlusal force in the intercuspal position was measured with pressure sensitive sheets. Stimulated whole saliva was collected.
Masticatory performance was significantly correlated to age, number of residual teeth, occlusal force and stimulated salivary flow rate by Pearson's correlation test. The multiple linear regression analysis showed that, with other variables controlled, masticatory performance was significantly associated with the number of residual teeth (¦Â = 0.456, P < 0.001), occlusal force (¦Â = 0.244, P < 0.001) and stimulated salivary flow rate (¦Â = 0.069, P = 0.003). Age was not related to masticatory performance (¦Â = ?.007, P = 0.753).
Declines in the number of residual teeth, occlusal force and salivary flow were associated with a reduction of masticatory performance in older adults. If tooth loss is not considered as an attribute of physiological ageing, then ageing by itself may not be a risk factor for masticatory dysfunction.