A sinus lift is a procedure used in dentistry to increase the height and volume of the maxillary sinus. The procedure involves lifting the tissue that lines the maxillary sinus so that bone can be inserted between the sinus membrane and the jawbone. This creates additional room for placement of dental implants, which helps to improve oral health and make it easier for patients to receive replacement teeth. Sinus lifts also restore lost bone volume in the jaw due to atrophy caused by missing teeth or periodontal disease.