Background: Longer implants have always been considered more reliable due to both an improved crown-to-implant ratio and a greater surface area available for osseointegration, which dissipates the imposed occlusal forces. However, the biomechanical rationale behind the use of short implants is that the crestal portion of the implant body is the most involved in load-bearing, whereas very little stress is transferred to the apical portion. Material and method: The study was conducted on patients divided into two groups: A total of 20 implants were placed (10 implants per group) in subjects requiring placement of mandibular and maxillary implants. All implants placed in both study groups are 3.8mm in diameter. Follow up for radiographic and clinical evaluation which was made at 1 week, 3 months and 6 months after implant loading for evaluation of crestal bone changes with help of radiographs. Results: Short and long implants showed comparable survival rates and success both clinically and radiographically in early loading in posterior mandible. Conclusion: Early loading of dental implants are highly predictable modality for replacing missing teeth in the atrophic alveolar ridge. Key words: Implant, Posterior, Loading