A precision attachment is a pre-formed attachment made by mechanical finishing, which is usually composed of two parts: a negative and a positive connection structure, one part is bonded to the abutment or implant and the other part is bonded to the denture to achieve connection and retention, thus providing retention, stability and aesthetics for the denture. The precision attachment is made of a special alloy through mechanical processing, and both the negative and positive structures are metal finished parts with precision fit, high wear resistance and high precision. They are suitable for patients with tooth loss who have high aesthetic and functional requirements for removable dentures, and have good abutment conditions and suitable intermaxillary distance. It is important to note that the following types of people cannot have precision attachments: 1. people with poor oral hygiene 2.The elderly and disabled who are unable to take care of themselves. 3, periodontitis of abutment teeth is not treated and controlled and/or root filling treatment is not perfect. 4.No intermaxillary distance required for placement of attachments. Advantages 1.No exposed rings, beautiful appearance. 2.Use own teeth as much as possible, reduce tooth extraction. 3.Protect the abutment teeth and reduce the occurrence of caries and periodontal disease. 4.Good retention, natural and comfortable. 5.Easy to repair, long service period. Recovery time The first dental implant. Make temporary teeth. Take the model. The colorimetric is about 2 hours. The interval between is about 1 week. The second time to adjust the jaw bonding is about half an hour.