PURPOSE: to study and evaluate the effect preventing dentine hypersensitiveness by using Fluor Protector or Green OrTM on the prepared vital pulp abutment teeth of PFM Bridges.
目的：评价氟保护剂和极固宁TM对烤瓷冠桥活髓基牙预备后牙本质过敏症的防治效果。
PURPOSE: to study and evaluate the effect preventing dentine hypersensitiveness by using Fluor Protector or Green OrTM on the prepared vital pulp abutment teeth of PFM Bridges.
目的：评价氟保护剂和极固宁TM对烤瓷冠桥活髓基牙预备后牙本质过敏症的防治效果。
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