Internal irrigation during implant surgery is primarily used to cool the rotating bur and prevent excessive heat generation in the bone. Elevated temperatures above 47°C can cause thermal osteonecrosis, leading to impaired healing and implant failure. The irrigation fluid absorbs and dissipates heat produced by the bur’s friction, preserving bone vitality and promoting successful osseointegration. Maintaining an optimal temperature is critical for preventing bone necrosis and ensuring stable implant integration.

Reference: Oral Implantology, Arun K. Garg, Third Edition.