A comparative study was done regarding patient satisfaction between telescopic retained implant supported and retained over-denture prosthesis on four implants and a screw retained hybrid prosthesis rehabilitation also retained by four implants in patients with a completely edentulous mandible. Twenty patients were evaluated in this study, split into two groups. Regarding the evaluation of the patient satisfaction it was tested using a quantitative method, by asking the twenty patients different questions in a questionnaire. After an appropriate follow –up period from 2 weeks, to 12 months in both groups (telescopic retained overdenture and screw retained hybrid restoration), the results revealed the following; there was no statistically significant difference after 3 months as well as from 3 to 6 months and also from 6 to 9 months. Also there was a none statistically significant difference from 9 to 12 months, regarding patient satisfaction. In conclusion patients were equally satisfied with both prosthetic options.