Jooste C H, Thomas C J
Department of Dental Prosthetics, Faculty of Dentistry, University of Stellenbosch, Republic of South Africa.
J Oral Rehabil. 1992 Sep;19(5):441-8. doi: 10.1111/j.1365-2842.1992.tb01108.x.
Six patients with previous denture experience were provided with new dentures. Metal indicators were placed on either side of the mandibular denture and a cobalt-chromium alloy marker was inserted in the left bucco-posterior area of the mandible in each case. In the new dentures posterior teeth were positioned up to the retro-molar pad, over the basal tissue slope of the posterior mandibular alveolar ridge. After habituation had taken place, a cineradiographic recording was made of chewing. Prior to the second recording the mandibular teeth were removed to a point where the remaining teeth were not over inclined residual alveolar ridges. Denture movement was observed by measuring the distances between the markers on an analytical projector. The results show a significant difference between the cranial values of the two chewing experiences. Values for all denture movements were less after removal of the teeth over an incline. These results support the clinical observation that teeth placed over a basal tissue incline have a destabilizing effect during complete mandibular denture function.
为6名有佩戴假牙经验的患者提供了新假牙。在下颌假牙的两侧放置了金属指示器，并且在每种情况下，在下颌骨的左颊后区域插入了一个钴铬合金标记物。在新假牙中，后牙被放置到磨牙后垫处，位于下颌后牙槽嵴的基托组织斜坡上方。在适应期过后，对咀嚼过程进行了动态X线录像记录。在进行第二次记录之前，将下颌牙齿拔除至剩余牙齿不会过度倾斜于残留牙槽嵴的程度。通过在分析投影仪上测量标记物之间的距离来观察假牙的移动。结果显示，两种咀嚼体验的颅骨值之间存在显著差异。在拔除倾斜的牙齿后，所有假牙移动的值都变小了。这些结果支持了临床观察，即在全下颌假牙功能期间，放置在基托组织斜坡上方的牙齿具有不稳定作用。
