If the tooth that you wish to get implanted is a molar on the upper jaw, then the answer may be yes. This is the only area close enough to the sinus cavity to warrant a sinus lift. If the tooth has been missing for a long period of time, or if the bone has receded around said area, then the answer is possibly yes. If you have any sort of bone disease that leads to brittle or diminished bone matter, than the answer can possibly be yes. The more of these situations are present, the more likely the need for a sinus lift.
When the doctor has a look during the consultation session and takes the necessary x-ray, he will be able to tell you whether or not a sinus lift will be necessary. If you are over 65 years old, the chances that you will need a sinus lift are also greater. If you have had your upper molars removed a while ago, then the chances that you will need a sinus lift grow exponentially with the time elapsed since the extraction. Once the bone is no more than 3-4 millimeters thick, you are almost sure to need a sinus lift.
Fortunately, once a sinus lift is performed, it rarely needs to be repeated in the same region.
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