Not everyone can get dental implants right away. In some cases, preliminary treatments like bone grafting or periodontal therapy need to be performed so that the gums and jawbone are ready to support the implant posts. If you’re getting dental implants in your upper jaw, then your periodontist might suggest a specific kind of preliminary treatment known as a sinus lift. Here’s what you need to know about this procedure and why you might need it before you can get new teeth.