El-Sheikh Ali M, Hobkirk John A, Howell Peter G T, Gilthorpe Mark S
Department of Prosthetic Dentistry, Faculty of Dentistry, Tanta University, Egypt.
J Prosthet Dent. 2004 Jan;91(1):26-32. doi: 10.1016/j.prosdent.2003.10.015.
Edentulous patients treated with implant-supported prostheses have shown increased passive tactile sensibility compared with those using conventional complete dentures. This is thought to be due to the close mechanical coupling between the implant and bone via the osseointegrated interface, yet the phenomenon has received little attention.
The purpose of this study was to measure passive tactile sensibility in a group of edentulous subjects treated with dental implants, and to relate the measured sensibility to a range of factors thought to be of possible relevance, namely, patient age, gender, time since implant placement, implant length, and implant separation.
Twenty edentulous subjects successfully treated with 2 or more Nobel Biocare dental implants in the anterior mandible were studied. The inclusion criteria were : (1) age of less than 50 years, (2) a period of at least 12 months since implant placement, (3) implant length of at least 10 mm and of standard diameter (excluding narrow and wide platform designs), and (4) implant separation of at least 18 mm. Using a computer-controlled custom-made device, pushing forces (2.1, 2.4, 2.7, and 3.0 N/s) were applied directly and perpendicular to the long axes of the implant abutments until the subjects felt the first sensation of pressure. The magnitude of these forces was measured with an integral transducer. The applied force had a ramped staircase pattern, and force application rates were varied between 2.1 and 3.0 N/s. Multilevel modeling was used to analyze the collected data (alpha=.05).
The threshold values of passive tactile sensibility ranged between 3.1 and 15.7 N (mean 10.9; SD 3.9). Analysis failed to show any significant association between passive tactile sensibility and the variables studied.
Within the limitations of this study, which included a small sample size, no relationship was found between passive tactile sensibility associated with long-standing implants and any of the variables studied (age, gender, time since implant placement, implant length, and implant separation).
与使用传统全口义齿的患者相比，接受种植体支持义齿治疗的无牙颌患者表现出更高的被动触觉敏感性。这被认为是由于种植体与骨组织通过骨结合界面形成了紧密的机械耦合，但这一现象很少受到关注。
本研究的目的是测量一组接受牙种植体治疗的无牙颌受试者的被动触觉敏感性，并将测量到的敏感性与一系列可能相关的因素联系起来，即患者年龄、性别、种植体植入后的时间、种植体长度和种植体间距。
研究了20名在下颌前部成功植入2颗或更多诺贝尔生物科技牙种植体的无牙颌受试者。纳入标准为：（1）年龄小于50岁；（2）种植体植入后至少12个月；（3）种植体长度至少10mm且为标准直径（不包括窄平台和宽平台设计）；（4）种植体间距至少18mm。使用计算机控制的定制设备，直接并垂直于种植体基台的长轴施加推力（2.1、2.4、2.7和3.0N/s），直到受试者感觉到第一次压力感。这些力的大小用积分式传感器测量。施加的力呈斜坡阶梯模式，力的施加速率在2.1至3.0N/s之间变化。采用多水平模型分析收集的数据（α=0.05）。
被动触觉敏感性的阈值在3.1至15.7N之间（平均10.9；标准差3.9）。分析未能显示被动触觉敏感性与所研究变量之间存在任何显著关联。
在本研究的局限性内，包括样本量较小，未发现与长期植入种植体相关的被动触觉敏感性与所研究的任何变量（年龄、性别、种植体植入后的时间、种植体长度和种植体间距）之间存在关联。
