The purpose of this study was to see how Laser treatment affected the implant stability and bone height changes of mandibular implant-supported over-dentures. Subjects and Methods: Ten entirely edentulous patients were chosen and rehabilitated using mandibular over-dentures supported by two implants in the canine region. Each patient received an upper and lower denture, and after surgery and placement of the two implant, they were divided into two implant groups. Group I: Right dental implant in each patient without Laser treatment. Group II: Left dental implant in each patient was subjected to six Laser treatment session by Semi-conductor diode laser. Each implant's stability was assessed at the time of surgery, one month, and three months later. Cone-beam Computed Tomography (CBCT) was used to measure bone height at the time of denture placement, six, and twelve months later. Results: There was a significant difference in implant stability measurements (p≤ 0.05), but a non-significant difference in bone height (p< 0.05) between the two studied groups. Where group II showed a higher value in implant stability and bone height measurements than group Ⅰ. Conclusion: The application of laser on dental implants has a great benefit in increasing implant stability and decreasing the crestal bone loss than implants not subjected to laser treatment