Sinus lifts are sometimes necessary when patients wishing to have dental implants replace their upper back teeth. Bone in this area of the mouth is thinner and less suitable for dental implants. It is also possible that a lack of bone in this area is simply due to the shape of your sinuses as some patients have bigger sinus cavities than others and sometimes the sinus cavity even incr... https://www.alabamaperiodontics.com/dental-implants-teeth-in-a-day/