Relationship between displacement of the masseter muscle during biting and masseter muscle quality and bite force in healthy elderly persons

Abstract

Background Although age‐related changes in muscle quality influence muscle strength, the relationship between masseter muscle (MM) quality and maximum biting force (MBF) has never been studied. Objective The aims of the study were to verify the relationship among MM quality, MBF, and the displacement of the MM while biting forcefully (MMD) and to clarify the age‐related decline in MBF in healthy elderly persons. Methods Seventy‐four healthy community‐dwelling individuals (mean age, >65 years) from Tokyo metropolis were recruited. The thickness (index of muscle quantity), echo intensity (index of muscle quality) and displacement of the MM while biting forcefully (MMT, MMEI and MMD, respectively) were measured by ultrasonography. MBF was measured using a pressure‐sensitive sheet. Independent predictors of MBF and MMD were determined using multivariate linear regression analyses adjusted for age, sex and the number of present teeth. Results MBF was significantly correlated with the number of teeth (β = 0.577, P < .001) and MMD (β = 0.302, P = .015), but not with MMT (β = 0.019, P = .868) or MMEI (β = 0.054 P = .703). MMD was significantly correlated with MMEI (β = −0.606, P < .001), but not with MMT (β = 0.048, P = .681) or the number of teeth (β = 0.065, P = .613). Conclusions MMEI was associated with MMD, an index of MBF, regardless of tooth number. The age‐related quality change in the MM might cause a decrease in its contraction, resulting in age‐related decline in MBF.

Indicators and Instruments to Assess Components of Disability in Community-Dwelling Older Adults: A Systematic Review

“…After discussion, an agreement was reached, or a consensus was established with the third author. After the full-text reading and analysis of the 136 full texts, 49 studies were included in the final analysis [ 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 , 48 , 49 , 50 , 51 , 52 , 53 , 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 , 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 , 74 , 75 , 76 , 77 , 78 , 79 , 80 , 81 ].…”

Prevalence of swallowing difficulties in older people without neurological disorders: Swallowing profile of older people in the city of Santos, Brazil

“…Hara et al 20 found a tongue strength and chewing force diminish with age. Hara et al 21 found a reduction in the quality of masseter muscle contractions during mastication with the increase in age. These findings are due to the changes in the tonus and mobility of stomatognathic structures inherent to the ageing process, which are the main causes of presbyphagia.…”

Association between the Number of Prosthetic Crowns and Periodontitis: The Korea National Health and Nutrition Examination Survey (KNANES VII) from 2016–2018

“…In adults less than 65 years of age, the presence of anterior tooth prostheses is more likely to be associated with severe dental caries and poor oral hygiene [41,42]; therefore, they have a higher probability of having periodontal disease due to insufficient plaque control. The results in adults aged above 65 years show that the loss of facial muscle function with increasing age is likely to cause food accumulation on the buccal aspect [43,44], thereby making the management of the molar prostheses difficult. In addition, the frequency of use of oral care products tends to decrease with age, accelerating periodontal disease and leading to poor oral hygiene, and factors such as systemic diseases may contribute to fewer visits to the dentist and, thus, affect the occurrence of periodontal disease.…”