During treatment Increased implant stability implies successful osseointegration with the surrounding bone whatever diminished implant stability may diagnose a type of implantation failure. So, it is essential to evaluate the implant stability quantitatively during the treatment procedure. Peri-implantitis is characterized by clinical signs of inflammation such as increased probing depths, and bone resorption, leading to implant failure. In peri-implantitis, Changes the biofilm structure towards increased counts of pathogenic microorganisms such as Porphyromonas gingivalis, which is one of the bacteria with the highest virulence. Aim: clinical evaluation of immediately loaded implant assisted complete mandibular overdenture after 10 years follow up regarding implant stability, periimplant pocket depth measurement and microbial evaluation of Porphyromonas gingivalis M&M: 5 completely edentulous male patients with maxillary conventional complete denture, and mandibular immediate loaded implant assisted complete overdenture using two implants in areas of mandibular canines with diameter 3.6 mm width and length 10 mm with O-ring attachments for retaining the overdenture, These patients were evaluated regarding dental implant stability using Osstell ISQ, clinical measurement of periimplant pocket depth (PPD) and microbial evaluation of Porphyromonas gingivalis (Pg). Results: After 10 years of implants placement, there was non-significant increase in ISQ of the dental implants compared to baseline readings but there was significant increase of PPD and finally non-significant increase level of Porphyromonas gingivalis. Con.: Two immediately loaded dental implants with 10mm length and 3.6mm diameter are satisfactory to assist complete mandibular overdenture opposed by conventional maxillary complete denture.