Sinus Lift vs Bone Graft: What Is the Difference?

Patients often ask whether they need “a sinus lift or a bone graft,” as if they were alternatives. They are not. A sinus lift is a bone graft — one performed in a specific anatomical location, for a specific reason.

The confusion is understandable: the upper back jaw has its own constraints, its own surgical approaches and its own price range.

The anatomy problem

The maxillary sinus is an air-filled cavity above the upper back teeth. The bone between the sinus floor and the tooth roots is often thin. When a tooth is removed, that bone can resorb further, leaving too little height for an implant.

An implant needs enough bone below the sinus to be stable and to avoid penetrating the sinus cavity. When there is not enough, the sinus floor has to be raised and the new space grafted.

The two approaches

Crestal (internal) sinus lift

The surgeon accesses the sinus through the implant site, using a specialized instrument to lift the membrane a few millimetres. Graft material is placed through the same channel, and the implant is often placed at the same time.

• Best for: a small increase in height, usually 2–4 mm.
• Cost: $800–$1,500.
• Advantages: less invasive, often one surgery.
• Limitations: limited elevation; not suitable for a large deficiency.

Lateral-window sinus lift

A small window is cut in the side wall of the maxilla, the sinus membrane is carefully elevated, and graft material is packed into the space. The window is covered with a membrane.

• Best for: severe bone loss, often less than 4–5 mm of residual height.
• Cost: $1,500–$2,500 per side.
• Advantages: can create substantial height; predictable for large defects.
• Limitations: more invasive, may be staged before the implant, higher risk of membrane perforation.

Sinus lift vs other bone grafts

When a sinus lift is needed

• An implant is planned in the upper back jaw.
• The CT shows insufficient bone height below the sinus.
• The sinus floor is close to the planned implant.
• A previous extraction or periodontal disease has reduced bone height.

When it is not needed

• There is enough bone height for the planned implant.
• A shorter implant can be used safely.
• An angled implant can avoid the sinus.
• The implant is in the front of the mouth, away from the sinus.

The procedure

1. Planning. Cone-beam CT, sinus health assessment, medication review.
2. Anaesthesia. Local anaesthesia; sedation optional.
3. Access. Crestal approach through the implant site, or lateral window.
4. Membrane elevation. The Schneiderian membrane is lifted carefully.
5. Graft. Particulate graft fills the space.
6. Closure. The window is covered or the implant site is closed.
7. Healing. Four to nine months before loading, depending on the approach and the graft.

Recovery and restrictions

• Do not blow your nose for at least two weeks.
• Sneeze with your mouth open.
• Avoid straws and forceful suction.
• Avoid flying and scuba diving for the period your surgeon specifies.
• Take antibiotics and nasal decongestants if prescribed.
• Report severe pain, fever, persistent bleeding or a bad taste.

Risks

• Membrane perforation. The most common intra-operative complication. Small tears are often repaired; large tears may require abandoning the graft and trying later.
• Infection. Sinusitis or graft infection.
• Graft loss. The graft can resorb or fail to consolidate.
• Bleeding.
• Implant failure.
• Sinus congestion or obstruction.

A history of chronic sinusitis, smoking or prior sinus surgery should be discussed before planning.

The cost comparison

The bottom line

A sinus lift is a bone graft of the upper jaw, performed through the implant site or a side window. It costs $800–$2,500, heals over four to nine months, and is needed only when the sinus limits bone height. It is not an alternative to a bone graft; it is one.

For the implant sequence, read bone graft for dental implants. For the full price table, see the cost guide.

The bone graft hub compares socket preservation, ridge augmentation and sinus lifts. For soft tissue grafting — an exposed root or thin gum — start with the gum graft cost guide and the periodontist directory.