Department of Restorative Dentistry, School of Dentistry, University of Washington, Seattle, Washington 98109, USA.
Int J Prosthodont. 2009 Nov-Dec;22(6):573-5.
The concept of tooth preparation for ceramic veneers remains controversial regarding whether the use of a palatal chamfer would affect the longevity of restorations. This study aimed to evaluate the load-fatigue testing of ceramic veneers using two different preparation designs-an incisal shoulder finish line with or without a palatal chamfer. A pressable ceramic veneer was bonded to the prepared maxillary central incisor using resin cement. The number of cycles until fatigue failure for each tooth-veneer specimen was recorded. Results revealed that using a palatal chamfer margin design significantly increased the fatigue failure cycle count.
对于是否使用腭切角会影响修复体的寿命，陶瓷贴面的牙体预备概念仍然存在争议。本研究旨在评估两种不同预备设计（有或无腭切角的切端肩台）的陶瓷贴面的负荷疲劳试验。使用树脂水门汀将可压陶瓷贴面粘接到预备好的上颌中切牙上。记录每个牙-贴面标本的疲劳失效循环次数。结果表明，使用腭切角边缘设计显著增加了疲劳失效循环次数。
