Conclusions: Echocardiography can be used for guidance of Amplatzer occlusion device of ASD with solid edge without the measurement of balloon expanding size of ASD.
结论：对于周缘较硬的房缺，经食管超声心动图可直接指导封堵器大小的选择和封堵。
Results It is necessary to improve the use of analgesia ( 27.3% ), pulpotomy ( 21.6% ), rubber dam ( 1.4% ) and fluoride, the related work of occlusion guidance should be reinforced.
结果无痛治疗（27.3%）、冠髓切断术（21.6%）、橡皮障的应用（1.4%）、氟化物的使用、咬合诱导等工作开展情况还有待加强。而根管治疗、窝沟封闭的应用情况比较好。
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