Results "Four-handed"technique was adopted in 6.00% of the clinics, while rubberdams were used only in 0.67% of the clinics.
结果实行“四手操作”的口腔医疗机构很少，仅占6.00%，使用橡皮障的医疗机构极少，占0.67%；
2
In combination with the rubber dam project at Xiaobudong on the Yihe River at Linyi City, the major technical problems in bolt clip anchoring of water filling rubberDAMS are fully analyzed.