Creating bone height for implants in the upper back jaw.
When you’ve been missing upper back teeth for years, there often isn’t enough bone between the gum line and the sinus floor to place an implant. Sinus lift surgery builds that height back, so implants can be placed where they otherwise couldn’t.
What a sinus lift involves, before you read further.
The practical details most patients want to know first.
Why upper back teeth run out of bone.
It comes down to a piece of anatomy sitting right where an implant needs to go, and what happens to the bone once a tooth is gone.
The maxillary sinus is an air-filled cavity in the upper jaw, positioned directly above your molars and premolars. Its floor, the bottom of the sinus, sits just above the roots of your upper back teeth. When those teeth are healthy, there’s usually enough bone between the sinus floor and the gum line to anchor an implant.
When a tooth is extracted or lost to disease, the bone that supported it resorbs over time and the sinus floor often drifts lower, leaving too little bone height to place an implant safely.
Most upper posterior implants need at least 8–10mm of bone height. Long-term denture wearers often have only 2–5mm left.
A sinus lift solves this by gently elevating the sinus membrane and placing graft material between the membrane and the existing bone, rebuilding the height an implant needs. Without it, the alternatives are usually to forgo implants in those positions or move to a remote-anchorage protocol. For most cases, a sinus lift is the more conservative, effective route.
The maxillary sinus sits directly above your upper back teeth.
The sinus floor is the ceiling of your bone. When there’s healthy tooth structure below it, that ceiling stays high and there’s room for an implant. Once the teeth are gone, the floor tends to drop and the bone thins, which is exactly why upper posterior sites so often need augmentation before an implant is possible.
Lateral window or crestal approach.
A sinus lift is performed through one of two approaches, chosen by how much height needs to be added and the anatomy of your case. Both reach the same outcome, more bone for a successful implant.
Lateral window sinus lift.
Used when significant bone height is needed, typically more than 5mm. A small window is made in the cheek-side wall of the upper jaw; through it, the sinus membrane is gently elevated and graft material placed in the space created. Direct visualization allows precise placement.
Crestal (osteotome) sinus lift.
Used when only a modest amount of height is needed, typically 2–4mm. Access is through the crest of the ridge, right where the implant will sit, using osteotome instruments to lift the sinus floor without a separate window. Less invasive, shorter recovery.
The procedure, plainly explained.
A sinus lift is performed under IV sedation in our office. Most patients are surprised by how routine it feels, recovery is typically less involved than expected, particularly for crestal approaches.
Anesthesia and timing
The procedure itself
Healing timeline
Sinus precautions
AAOMS: dental implant surgery & sinus augmentation
What it costs, and what’s typically covered.
Sinus lift cost varies with approach, materials, and complexity. We verify your specific coverage before treatment and provide a written estimate of patient responsibility.
Coverage varies by plan
Calm, careful, and clear, every time.
Sometimes there’s a way around the sinus lift entirely.
A sinus lift is the most conservative option for most upper posterior cases, but not the only one. Short-implant protocols can place implants in 6–7mm of bone in certain positions, avoiding augmentation altogether when bone quality and bite allow. For full-arch patients with severe upper-jaw atrophy, zygomatic implants anchor into the cheekbone instead of the maxilla, eliminating the sinus lift and its months of healing. Which path fits your case depends on bone quality, position, and load, discussed openly at consultation, with 3D imaging in front of us.
Questions worth asking.
Sinus lift surgery is typically performed with IV sedation and local anesthesia to keep you comfortable during the procedure. Mild to moderate swelling and tenderness are common for 4 to 7 days and can usually be managed with prescribed or over-the-counter medications. As with any surgery, there are risks. One of the more common complications is a small perforation of the sinus membrane, which can often be repaired during the procedure without affecting the final outcome. Long-term success rates are high when the procedure is appropriately planned and performed.
Most sinus lifts fall between $500 and $3,500, depending on the approach. A crestal sinus lift performed at the time of implant placement typically adds $500 to $1,500 to the implant procedure. A lateral window sinus lift performed as a standalone surgery typically runs $1,500 to $3,500. Bilateral cases increase the total, though the second side is often less than a full second fee. For full-arch patients, any required sinus lift is quoted in writing before a surgical date is scheduled, and HSA or FSA funds are eligible for the expense.
It depends on the surgical approach. Lateral window sinus lifts typically require several months of healing before implant placement, depending on the graft and individual healing. Crestal sinus lifts may allow the implant to be placed at the same time as the elevation. Whether simultaneous placement is appropriate depends on your existing bone quality and the amount of elevation required. We will determine the timing after reviewing your 3D imaging during consultation.
In some cases, yes. Modern short-implant protocols allow placement in 6–7mm of bone in certain positions, avoiding the need for sinus augmentation. The trade-off is that short implants may have slightly different long-term outcomes than standard-length implants in adequate bone, and not every site is appropriate. Whether short implants are an option for your case depends on bone quality (not just quantity), the position being implanted, and the loading characteristics of your bite, discussed at your consultation.
For full-arch patients with severe maxillary atrophy, zygomatic implants are an alternative to extensive sinus lift surgery. They anchor into the cheekbone (zygoma) instead of the maxilla itself, eliminating the need for sinus augmentation and the months of healing it requires. Zygomatic implants are typically reserved for full-arch cases with severe atrophy, not for individual posterior implant placement. For one or two upper posterior implants, a sinus lift is usually the more appropriate approach.
Avoid flying and significant air-pressure changes for 2–3 weeks after surgery. The healing sinus membrane is vulnerable to pressure changes during the initial healing period, and flying can potentially disrupt the graft material before it stabilizes. Plan your surgery date with travel schedules in mind. For patients traveling from a distance, we’ll discuss the recovery timeline and travel restrictions clearly at consultation so you can plan accordingly.
It depends on your plan and how the procedure is coded. Some dental plans treat sinus augmentation as a major service when it is documented as part of pre-implant preparation, usually with a waiting period and an annual maximum that the implant itself also draws against. Others exclude bone grafting entirely. Medical insurance occasionally covers a sinus lift when there is a documented medical need beyond implant preparation. We verify your specific benefits before treatment and give you a written estimate of what you would owe, so there is no guessing after surgery.
Get the bone height your implants need.
If you’ve been told you don’t have enough bone for upper posterior implants, a sinus lift may be the answer. Schedule a consultation to discuss your specific case and find out which approach applies to your situation.