Validation of the Eichner index in relation to occlusal force and masticatory performance.
Validation of the Eichner index in relation to occlusal force and masticatory performance.
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发表时间：
2010-11
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通讯作者：
K. Ikebe;K. Matsuda;S. Murai;Y. Maeda;T. Nokubi
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作者：
K. Ikebe;K. Matsuda;S. Murai;Y. Maeda;T. Nokubi
目的Eichner指数(A、B和C)，特别是Eichner亚组(A1-A3、B1-B4、C1-C3)与口腔功能的关系尚未得到证实。本研究的目的是在牙列正常或部分无牙弓的受试者中，研究后牙合接触缺失与咬合力和咀嚼功能的关系。材料与方法研究样本包括1,288名60岁以上独立生活的患者。根据Eichner指数将受试者分为10个亚组。采用压敏片测量牙尖间位双侧最大咬合力。咀嚼性能取决于从粉碎的胶状凝胶中获得的溶解葡萄糖的浓度。结果后牙合接触与咬合力和咀嚼功能显著相关。在A2到B2和B3到C3亚组中测量的咬合力没有统计学差异，尽管随着咬合接触丢失的增加，总的咬合力显著下降。类似地，咀嚼性能随着咬合接触的减少而降低，尽管下降更为缓慢。A1至B1、A3至B2、B2至B3、B4至C2和C1至C3亚组之间的咀嚼性能没有显著差异。结论Eichner指数亚组与口腔功能减退显著相关，即使用可移除修复体修复牙齿也是如此。保留双侧(B2)和单侧(B3)前磨牙的咬合接触分别对咬合力和咀嚼性能至关重要。
PURPOSE Eichner Indices (A, B, and C), especially the Eichner subgroups (A1-A3, B1-B4, C1-C3), have not been validated in relation to oral functions. The purpose of this study was to investigate the association of posterior occlusal contact loss with occlusal force and masticatory performance in subjects who had a normal dentition or partially edentulous arches restored with removable prostheses. MATERIALS AND METHODS The study sample consisted of 1,288 independently living patients over the age of 60 years. Subjects were grouped into 10 subgroups by posterior occlusal contacts according to the Eichner Index. Bilateral maximum occlusal force in the intercuspal position was measured using pressure-sensitive sheets. Masticatory performance was determined by the concentration of dissolved glucose obtained from comminuted gummy jellies. RESULTS Occlusal force and masticatory performance were significantly associated with posterior occlusal contacts. Occlusal force measured in subgroups A2 to B2 and B3 to C3 did not differ statistically, although overall occlusal force decreased significantly as the loss of occlusal contacts increased. Similarly, masticatory performance was reduced with decreasing occlusal contact, although the decline was more gradual. Masticatory performance among subgroups A1 to B1, A3 to B2, B2 to B3, B4 to C2, and C1 to C3 did not differ significantly. CONCLUSIONS The Eichner Index subgroups were significantly associated with reduced oral functions, even if the teeth were restored with removable prostheses. Preservation of occlusal contacts of the bilateral (B2) and unilateral (B3) premolars was critical for occlusal force and masticatory performance, respectively.