作者研究低频超声对实验性龈炎的治疗作用,用18只狗(2～3岁)作实验,用铜铝丝结扎狗的下前牙,造成不能保持清洁的状况,两个月即发生实验性龈炎。然后有12只狗用超声器YPCK—7H—18的针形波导通过1:5000呋喃西林液处理每个龈乳头10秒钟,波导管距龈1～2mm,共治疗2～3次。其余6只狗只用 The authors studied the therapeutic effect of low-frequency ultrasound on experimental gingivitis, with 18 dogs (2-3 years old) experimenting with copper aluminum wire ligation of the dog's lower anterior teeth, resulting in not being able to maintain a clean condition, two months of experimentation Gingivitis. Then 12 dogs treated each gingival papilla with 1: 5000 nitrofurazone for 10 seconds with a needle waveguide of YPCK-7H-18. The waveguides were 1 to 2 mm away from the gingival for a total of 2 to 3 treatments. The remaining 6 dogs only