The introduction of implant treatment improved the quality of life of edentulous patients. Implant treatment was originally designed as support for removable bridges of edentulous patients. However, a need for replacement appeared in treatment of patients with questionable bone condition and for special needs. Such treatment plans have an impact on biomechanics, maintenance and success of implants themselves. Preoperative evaluation of structure and quality of the residual edentulous ridges and interjaw relationships will determine limitations and treatment plan. Aesthetics, speech, hygiene and costs will also help in determination of the right treatment plan. The herewith presented currently available prefabricated attachment systems for implant supported overdentures enable, beside accurate knowledge of health status, support of medial measure in the way that is not harmful to patients’ health. Furthermore, based on research and experience of others clinicians can make decisions on the choice of attachment depending on the desired attachment quality and special characteristics of the clinical case. Treatment goals should be carefully analyzed with respect to the patient’s individual optimum state. Despite the widespread opinion that fixed implant-prosthetic treatment can provide better function and patient satisfaction, implant supported overdenture can be accepted as equally good replacement or for certain indications even as a more appropriate treatment method.