Ruian Haian Motor Retaining Ring Factory was founded in 1983. It has Ruian Hongsheng Standard Parts Factory. It is a professional manufacturer of standard parts and fasteners. The machinery, electrical appliances, electronics, motors, auto parts and other enterprises in the city and autonomous region are used together, and various non-standard customized products are produced at the same time, and the product quality is well received by the majority of users. Take a typical cast three-arm snap ring (positive snap ring) as an example, which consists of a snap ring arm, a snap ring body, a support and a connecting body. Snap ring arm The snap ring arm is the free part of the snap ring, which is full of elasticity. The arm tip of the snap ring is located in the undercut area, which is the main part of the retaining effect of the snap ring. When the denture is put in, the elasticity of the arm end is retained by the snap ring, and it enters the undercut area through the shape protrusion of the abutment crown. When the dislocation force works, it will prevent the denture from dislocating in the direction. During the process of entering and exiting the undercut area of u200bu200bthe retaining arm through the high point of the abutment shape, the horizontal component force generated by the retaining arm on the abutment should be offset by the correspondingly designed clasp opposing arm or guide plane plate, small connecting body, etc. To avoid damage to the abutment by lateral force. The initial part of the clasp arm should be rigid and placed in the non-undercut area to stabilize and prevent lateral displacement of the denture. The shape of the snap ring arm is different according to the material used and the production method, and the commonly used three are circular, semicircular and flat. Snap ring body Snap ring body, also known as clasp shoulder: It is the hard part connecting the clasp arm, the rest and the small connecting body. The denture moves gingivally and laterally to stabilize and support the denture, while supporting the clasp arm. Therefore, the clasp body is required to have high strength, be not easily deformed, be located in the non-undercut area, and not affect the occlusion. The small connector is the part of the snap ring embedded in the base or connected with the large connector, which mainly plays a connecting role, making the snap ring and other parts of the denture integrated into a whole. The connector should not enter the abutment or soft tissue undercuts to avoid compromising seating. The support is often cast in one piece with the snap ring. The so-called three-arm snap ring is a general name for the support as an arm.