Department of Prosthetic Dentistry, Service of Odontology, Hôtel-Dieu Hospital, AP-HP, France.
J Oral Rehabil. 2010 Jan;37(1):54-62. doi: 10.1111/j.1365-2842.2009.02020.x. Epub 2009 Nov 11.
The aim of this study was to validate an original portable device to measure attachment retention of implant overdentures both in the lab and in clinical settings. The device was built with a digital force measurement gauge (Imada) secured to a vertical wheel stand associated with a customized support to hold and position the denture in adjustable angulations. Sixteen matrix and patrix cylindrical stud attachments (Locator) were randomly assigned as in vitro test specimens. Attachment abutments were secured in an implant analogue hung to the digital force gauge or to the load cell of a traction machine used as the gold standard (Instron Universal Testing Machine). Matrices were secured in a denture duplicate attached to the customized support, permitting reproducibility of their position on both pulling devices. Attachment retention in the axial direction was evaluated by measuring maximum dislodging force or peak load during five consecutive linear dislodgments of each attachment on both devices. After a wear simulation, retention was measured again at several time periods. The peak load measurements with the customized Imada device were similar to those obtained with the gold standard Instron machine. These findings suggest that the proposed portable device can provide accurate information on the retentive properties of attachment systems for removable dental prostheses.
本研究的目的是验证一种原始的便携式设备，以测量种植覆盖义齿附着体在实验室和临床环境中的固位力。该设备由一个数字测力计（Imada）固定在一个垂直轮架上，该轮架与一个定制的支撑相连，用于以可调节的角度保持和定位义齿。将 16 个基质和压模圆柱形嵌体附着体（Locator）随机分配作为体外测试样本。将附着体基台固定在数字测力计或作为金标准（Instron 万能试验机）使用的拉力机的称重传感器上。将基质固定在连接到定制支撑的义齿复制品上，允许在两个牵引装置上重复其位置。通过测量每个附着体在两个装置上五次连续线性脱位过程中的最大脱位力或峰值负载来评估轴向附着体固位力。经过磨损模拟后，在几个时间段再次测量保留力。使用定制的 Imada 设备进行的峰值负载测量与使用金标准 Instron 机器获得的测量结果相似。这些发现表明，所提出的便携式设备可以为可摘局部义齿的附着体系统提供有关其固位性能的准确信息。
