The most important mobile prosthetic soluction for the implants wich we use are different tipes of attachment such as bars, studs, magnets and telescopic copings. Other then this classification to use is also very important resiliency level of the attachment assembly. In this way,based on resiliency, attachments can be rigid non-resilient, restricted vertical resilient, hinge resilient, rotatory resilient, combination resilient and universal resilient. Factor that have influence on the design and resiliency leval of the attachments are: shape of the arch, distribution of the implants in the arch, length of the implants and degree of implant bone interface and the distance between the most anterior and posterior implants. Overdenture wich are supported by the attachments have the strong retenty and wich them we have the minimal posibility of vertical, hinge, rotation, translation and spinning and combination of the above movements. Also one of the most important factors wich will help use to select the best attachments are available bone, patient prosthetic expecatations, financial ability of the patient to cover treatment cost, personal choic and clinical experties of the dentist and experience and technical knowledge of the lab technicians.