When there is insufficient bone height in the upper posterior jaw, a sinus lift may be required before implant placement. The procedure gently elevates the sinus membrane and adds bone graft material to increase bone volume and provide adequate support for implants. Two common techniques are available: the Lateral Window Sinus Lift for more significant bone augmentation, and the Crestal Sinus Lift, a minimally invasive approach suitable when more residual bone is present. The most appropriate technique will be selected based on individual clinical needs