A sinus lift is one of the most common bone grafting procedures in implant dentistry, and one of the most misunderstood by patients. It’s performed in the upper back jaw — where the maxillary sinus sits directly above where molar teeth used to be — and it solves a specific problem: when a tooth is missing in this area for a long enough time, the sinus expands downward into the space that would otherwise hold an implant. A sinus lift gently restores the bone in that space so an implant can be placed.
The maxillary sinus is an air-filled cavity that sits inside your upper jaw, just above the roots of your back upper teeth. As long as those teeth are present, they hold the sinus floor in position. When upper molars are extracted and not replaced, two things happen simultaneously: the bone below the sinus shrinks (vertical loss), and the sinus itself expands downward to fill the space (sinus pneumatization).
The combined result is that what used to be 12mm of solid bone available for an implant becomes 3–5mm of bone with sinus directly above it — far too little to place a traditional implant safely. A sinus lift solves this by re-establishing 8–12mm of usable bone height in this region.
The right technique depends on how much bone is currently present and how much needs to be added.
Before surgery, we use 3D cone-beam CT imaging to map the precise dimensions of your sinus, the thickness of the sinus membrane, and any anatomical variations that affect surgical access. This is non-negotiable for sinus lift planning — without 3D imaging, the procedure is essentially guesswork.
The surgery itself is performed under IV sedation in nearly all cases, so you’re comfortably asleep throughout. A typical lateral sinus lift takes 60–90 minutes per side. After surgery, post-operative instructions include avoiding nose-blowing, sneezing through closed mouth, and pressure changes (flying, scuba diving) for 2–3 weeks while the membrane heals.
Most patients return to normal daily activity within 3–5 days. Mild swelling is common for 5–7 days and is managed with cold compresses for the first 48 hours, then warm compresses thereafter. Prescription pain medication is typically used for 3–5 days, then over-the-counter as needed.
The integration period — during which the graft matures and becomes load-bearing bone — extends 6–9 months for the lateral approach, 3–4 months for the crestal approach. You’re not in discomfort during this time; the bone is simply maturing.
For some patients with severe upper-jaw bone loss, the choice isn’t between “sinus lift” and “no sinus lift” — it’s between a sinus lift plus traditional implants, and zygomatic implants that bypass the sinus entirely. The trade-offs:
