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。

youdao

Their game, Crop Master: Protector of the Green Earth, is a series of eco-inspired mini games which include dropping massive corks into polluting chimneys and having to click the mouse fast enough to spin a wind turbine.

BBC: NEWS | UK | England | Cornwall | Students designing Eden web games