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Welcome to Midway Dental Laboratory website, we are always ready for your needs of low price and high quality spring retainer made in China and China spring retainer, dental spring retainer.The Spring Retainer is used for alignment of rotated incisors. Up to four anterior teeth first are reset into ideal alignment on the working model. A resilient wire framework, with added acrylic, provides the necessary corrective forces to move the teeth. This simple design provides an efficient removable appliance for correction of irregular or relapsed incisors.