Sinus lift for dental implants

The maxillary sinus is an air space sitting above the roots of the upper back teeth. Once those teeth are lost, the bone between the ridge and the sinus often becomes thinner, both because the ridge resorbs from below and because the sinus tends to enlarge downward. If the remaining height is insufficient to hold an implant securely, bone has to be added beneath the sinus floor. Whether that applies to you is a measurement taken from a three-dimensional scan.

It depends on the technique and how much bone was gained. Where enough existing bone provided initial stability, implants are sometimes placed at the same visit as the graft. Where the height was too low, the graft is left to mature for a period before implants are placed, and that interval should be stated in your plan. In either case, reassessment imaging before or at implant placement is what confirms the graft has actually worked.

The procedure is carried out under local anesthetic, with sedation available. Afterwards, swelling and bruising are common, particularly with a lateral window approach where it can extend to the cheek and under the eye. Some blood-tinged nasal discharge is not unusual. Discomfort should reduce steadily; increasing facial pain, congestion or purulent discharge suggests sinus infection and should be reported instead of waited out.

Membrane perforation is the most common event during this procedure and is not a disaster. Small perforations are frequently repaired at the time with a membrane and the graft proceeds as planned. Larger tears may mean placing less graft material, or abandoning and rescheduling once the site has healed. An experienced surgeon will discuss this possibility beforehand, and it is a reasonable thing to ask about during consent.

Sometimes. Depending on the anatomy, options can include shorter implants that fit the available height, implants angled to engage bone elsewhere such as in a tilted full-arch configuration, a bridge using other teeth, a removable partial denture, or deciding not to replace those teeth. Which of these are realistic depends entirely on what the scan shows. If a sinus lift has been proposed, asking what alternatives were considered and why they were set aside is fair.

Practices commonly advise avoiding air travel and diving for a period after sinus grafting, because pressure changes can affect the elevated membrane and the graft during early healing. The exact interval varies with the technique and how the procedure went, so it should come from your surgeon, not from general guidance. If you have travel planned, mention it before the surgery is scheduled instead of afterwards.

Existing sinus disease, chronic congestion, polyps, recurrent infection, increases the risk of complications and is usually addressed before grafting, sometimes with referral to an ENT specialist. This is one of the reasons a CBCT is valuable beyond measuring bone: it shows the state of the sinus itself. Disclosing a history of sinus trouble, nasal surgery or persistent congestion is genuinely important instead of incidental.

A lateral window approach accesses the sinus through an opening on the side of the jaw, giving direct visualization and allowing larger bone gains, but it is more invasive with more swelling and usually a healing interval before implants. A crestal, or internal, approach works through the implant site itself, gently raising the sinus floor for smaller gains, and is less invasive: sometimes allowing implant placement at the same visit. Which is appropriate depends on how much height is needed, measured from a 3D scan.

Not necessarily: where enough existing bone already provides adequate initial stability for the implant, it can sometimes be placed at the same time as the graft. Where starting height is too low for that stability, the graft needs time to mature before an implant is added. Which situation applies to you is determined from the 3D imaging at planning, not from a general rule about sinus lifts.

Yes: the graft may not achieve the height needed, particularly if a large membrane perforation occurred, if infection develops, or if the graft material is lost. This does not necessarily end the implant plan; it can mean a repeat graft, a longer healing interval, or reconsidering implant position or a shorter implant. What matters is establishing beforehand who bears the cost of repeating the procedure if the first attempt falls short.

Meaningful, lasting changes to voice or facial appearance are not an expected outcome of a sinus lift: the procedure adds bone below the sinus floor, not altering facial structure. Temporary swelling, particularly with a lateral window approach, can affect the cheek area during early healing, and some people notice minor, short-lived changes in nasal resonance while swelling and any congestion resolve, but this is expected to settle instead of persist.

It is calculated from the height shown on a 3D scan against the minimum height the planned implant length requires for stable placement, not from a general rule that applies to every case. A shorter implant may need less added height than a standard-length one, which is part of why implant length and the sinus lift plan are usually discussed together instead of decided separately.