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Association of aging and tooth loss with masseter muscle characteristics: an ultrasonographic study
Clinical Oral Investigations ( IF 3.4 ) Pub Date : 2020-03-16 , DOI: 10.1007/s00784-020-03255-y
Kohei Yamaguchi 1 , Koji Hara 1 , Kazuharu Nakagawa 1 , Chizuru Namiki 1 , Chantaramanee Ariya 1 , Kanako Yoshimi 1 , Ayako Nakane 1 , Kazumasa Kubota 1 , Junichi Furuya 1 , Haruka Tohara 1
Affiliation  

Abstract

Objectives

This study aimed to investigate the relationship between aging and tooth loss on masseter muscle quantity and quality.

Materials and methods

This cross-sectional study was conducted among 112 participants (in their 20s to 90s) who were independent in activities of daily living and were able to follow verbal commands. Exclusion criteria comprised participants with a lack of molar occlusal support, diseases that could affect muscle function, or temporomandibular disorder. Age, tooth loss, and weight were documented, and masseter muscle thickness (MMT) and masseter muscle echo intensity (MMEI) were measured using an ultrasonic diagnostic apparatus. A multiple regression analysis was used to determine the relationship between MMT, MMEI, aging, and tooth loss, among each sex. The significance level in the statistical analysis was p < 0.05.

Results

In males, aging was a significant explanatory variable for MMT (adjusted R2 = 0.27), while both aging and weight were significantly associated with MMEI (adjusted R2 = 0.54). In females, tooth loss and aging were significant explanatory variables for MMT (adjusted R2 = 0.36) and MMEI (adjusted R2 = 0.5), respectively. In both men and women, MMT and MMEI were highly correlated.

Conclusions

Masseter muscles in males were more likely to be attenuated by aging than in females. The main attenuation factors were observed to differ between MMT and MMEI in women.

Clinical relevance

In females, preservation of the natural dentition or prosthetic treatment may be effective for maintaining masseter muscle characteristics. In males, additional approaches, such as resistance exercise training, may be necessary.



中文翻译:

衰老和牙齿脱落与咬肌特性的关联:超声检查

摘要

目标

这项研究旨在探讨衰老和牙齿脱落与咬肌数量和质量之间的关系。

材料和方法

这项横断面研究是在112名参与者(20至90年代)中进行的,他们独立于日常生活活动并且能够遵循口头命令。排除标准包括参与者缺乏磨牙咬合支持,可能影响肌肉功能的疾病或颞下颌疾病。记录年龄,牙齿脱落和体重,并使用超声诊断仪测量咬肌厚度(MMT)和咬肌回声强度(MMEI)。多元回归分析用于确定男女之间MMT,MMEI,衰老和牙齿脱落之间的关系。统计分析的显着性水平为p <0.05。

结果

在男性中,年龄是MMT的重要解释变量(调整后的R 2  = 0.27),而年龄和体重均与MMEI显着相关(调整后的R 2  = 0.54)。在女性中,牙齿脱落和衰老分别是MMT(调整后的R 2  = 0.36)和MMEI(调整后的R 2  = 0.5)的重要解释变量。在男性和女性中,MMT和MMEI高度相关。

结论

男性的咬肌比女性更容易被衰老所削弱。观察到女性的MMT和MMEI之间的主要衰减因子有所不同。

临床相关性

在女性中,保留天然牙列或进行假体治疗可能对维持咬肌特性有效。对于男性,可能需要其他方法,例如抵抗运动训练。

更新日期:2020-03-16
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