Root canal preparation with hand use stainless steelfile.
手用不锈钢锉根管预备。
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Theproducts include:screen family, chair family, log family, plate type family, sofa and teapot family, steelfile cabinet family and so on.
生产产品包括：屏风系列、座椅系列、原木系列、板式系列、沙发茶几系列、钢制文件柜系列等。
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Objective: To compare the clinical effects after root canal preparation with hand use stainless steelfile, nickel titanium alloy engine file and root canal ultrasonic file.