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首页> 外文期刊>Journal of dentistry >Tactile sensitivity of vital and endodontically treated teeth
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Tactile sensitivity of vital and endodontically treated teeth

机译：生命和内透牙齿治疗牙齿的触觉敏感性

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Objectives Endodontically treated teeth (ETT) used as abutments for removable partial dental prostheses (RPDPs) have an increased fracture risk as compared to vital abutments. One suggested explanation is that ETT exhibit a lower threshold level for tactile sensitivity than vital teeth. Therefore, this study compared the threshold for tactile sensitivity of vital teeth and ETT in the same individuals.Methods Forty participants with double crown-retained RPDPs fixed to vital teeth and ETT were included in the study. Each subject had at least one vital and one corresponding contralateral endodontically treated abutment tooth in the same jaw. After removal of the RPDP, an increasing centric force (0 cN to max. 2000 cN) was separately applied axially to both free-standing abutment teeth using a force gauge while the patient was asked to give three acoustic signals: (1) when noticing the first contact, (2) when noticing pressure and (3) when the pressure became displeasing. Afterwards, the same trial was performed with an eccentric force applied parallel to the tooth axis.Results Statistical analysis revealed no significant differences in the threshold of tactile sensitivity of vital teeth and ETT to either centric or eccentric loading (p > 0.05). Eccentric loading showed lower mean threshold values compared to centric loading. A large variability of tactile sensitivity between individuals was noted. However, there were no gender-related significant differences in tactile sensitivity (p > 0.05).Conclusions The tactile sensitivity of vital and non-vital teeth seems comparable.Clinical significance The assumption that a lower threshold level for tactile sensitivity in ETT than in vital teeth is responsible for their increased fracture risk could not be confirmed. Therefore, other reasons, e.g. loss of hard tissue due to root canal treatment, have to be considered responsible for the increased fracture risk of ETT.
机译：目的，用作可移除的部分牙科假肢（RPDP）的牙齿（ETT）用作可拆卸的部分牙科假体（RPDP），与重要的基台相比具有增加的裂缝风险。一个建议的解释是，ETT表现出触觉敏感性的较低阈值水平而不是生命牙齿。因此，该研究比较了生命牙齿的触觉敏感性的阈值和同一个体的倾斜敏感性。方法中的四十名参与者固定在生命牙齿和ETT中纳入研究。每个受试者至少有一个至关重要的和一个相应的对侧椎间露治疗的邻接牙齿。除去RPDP之后，使用力量计分别轴向轴向地施加增加的中心力（0cN至最大值2000cn），同时患者提供三种声信号：（1）注意到当压力变得令人愉快时，第一触点，（2）当压力和（3）时。然后，用平行于牙齿轴施加的偏心力进行相同的试验。结果统计分析显示，重要牙齿和ETT的触觉敏感性阈值没有显着差异，以以中心或偏心载荷（P> 0.05）。与中心负载相比，偏心载荷显示较低平均阈值。注意到个体之间的触觉敏感性的大幅变化。但是，触觉敏感性没有性别相关的显着差异（p> 0.05）。结论生命和非重要牙齿的触觉敏感性似乎是可比的。临床意义，假设触觉触觉触觉敏感性的触觉敏感度至关重要牙齿负责他们增加的骨折风险无法确认。因此，其他原因，例如由于根管治疗而导致的硬组织丧失，必须考虑对欧特的骨折风险增加。

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