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方法：常规口腔预备，准确的选择抗衡及消除支点的设计，经1～3年的随访记录，观察293件修复体的稳定效果。
Methods: After routine oral preparation, design of balancing and fulcrum free were selected, the stability of the restorations of 293 cases has been observed for 1-3years.
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