The recommended time interval between surgery and loading implants in the posterior mandible is 4 months because this area typically has dense cortical bone that allows for faster and more predictable osseointegration compared to maxillary sites. Early loading at 4 months balances adequate bone healing and implant stability, reducing the risk of micromotion that can compromise osseointegration. Waiting less than 4 months may lead to insufficient bone maturation, while longer intervals do not significantly improve outcomes and delay prosthetic rehabilitation unnecessarily.

Reference: Dental Implant Prosthetics, Carl E. Misch, 2nd Edition.