常見例句雙語(yǔ)例句Objective: To sum up and analysis the causes of failure about treating pulpless and discolored anterior teeth with the method of interior tooth bleaching.目的：總結(jié)和分析用內(nèi)漂白方法治療無(wú)髓變色前牙的失敗原因。 返回 pulpless tooth