Masticatory performance in older subjects with varying degrees of tooth loss
Masticatory performance in older subjects with varying degrees of tooth loss
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DOI：
10.1016/j.jdent.2011.10.007
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发表时间：
2012-01-01
影响因子：
4.4
通讯作者：
Maeda, Yoshinobu
中科院分区：
文献类型：
--
作者：
Ikebe, Kazunori;Matsuda, Ken-ichi;Maeda, Yoshinobu
目的：本研究的目的是建立影响不同程度牙齿脱落的老年人咀嚼功能的因素和相关的后牙合接触数。方法：研究对象为1274名60岁及以上独立生活的老年人。没有替换假牙的部分或全部无牙弓患者或有任何与口腔问题相关症状的患者被排除在研究参与者之外。测定咀嚼性能、最大咬合力和受刺激的全唾液。根据艾希纳指数，将受试者按后咬合接触分为三类。A组在四个支助区有联络人；B组有1 ~ 3个接触区或仅前区接触；而C组则完全没有支撑区，尽管还有几颗牙齿。结果：B组和C组的咀嚼功能分别为A组的81%和50%。多元线性回归分析结果显示，各组的咬合力与咀嚼性能有显著相关性。A组和B组残牙数与咀嚼性能显著相关，而C组残牙数与咀嚼性能无显著相关。结论：老年人咬合接触、咬合力和唾液流量的下降似乎与咀嚼功能的下降有关。然而，咀嚼功能的关键因素是不同的，这取决于咬合塌陷的阶段。(C) 2011 Elsevier Ltd.版权所有。
Objectives: The purpose of this study was to establish the factors influencing the masticatory performance of older subjects with varying degrees of tooth loss and associated numbers of posterior occlusal contacts.Methods: The subjects consisted of 1274 independently living people aged 60 years and over. Individuals with partially or fully edentulous arches without a denture replacement or those having any symptoms related to an oral problem were excluded from the study participants. Masticatory performance, maximal occlusal force and stimulated whole saliva were measured. Subjects were grouped into three categories by posterior occlusal contact, according to the Eichner Index. Group A had contacts in four support zones; group B had one to three zones of contact or contact in the anterior region only; and group C had no support zones at all, although a few teeth could still remain.Results: The masticatory performance in groups B and C was found to be 81% and 50% of that of group A, respectively. The multiple linear regression analysis showed that in all the groups, occlusal force was significantly associated with masticatory performance. In groups A and B, the number of residual teeth was significantly associated with masticatory performance, whereas in group C, it had no significant relationship with masticatory performance. Salivary flow rate had a significant correlation with masticatory performance only in group C.Conclusions: Declines in occlusal contact, occlusal force and salivary flow appear to be associated with reduction of masticatory performance in older adults. However, the crucial factors for masticatory performance varied, depending on the phase of occlusal collapse. (C) 2011 Elsevier Ltd. All rights reserved.