The time required for osseointegration in the maxilla is typically longer than in the mandible due to its lower bone density and more porous structure. This results in a slower healing process and requires a longer period for the implant to achieve stable integration with the surrounding bone. Clinically, a 6-month healing period is recommended to ensure sufficient bone remodeling and implant stability before loading. This timeframe minimizes the risk of implant failure by allowing proper vascularization and maturation of bone in the maxillary region.

Reference: Oral Implantology, Carl E. Misch, 3rd Edition.