常見例句雙語例句Objective: To investigate feasibility of pinhole drilled in dental cervix of crown of tooth.目的：探索牙冠頸部建立引流孔的可行性。Methods The first molar was welded with a molar root movement controller, which extending backward and clinging to the edge of second molar dental cervix.方法在第一磨牙帶環(huán)上銲接一控根移動桿，其桿曏後延伸緊貼第二磨牙牙冠頸緣上。 返回 dental cervix