Get upper jaw implants when bone has shrunk. Understand whether you truly need this procedure.
Sinus Lift Surgery: Quick Answer
A sinus lift (sinus augmentation) is a bone grafting procedure that elevates the floor of the maxillary sinus and packs bone graft material beneath it to create sufficient bone height for a dental implant in the upper back jaw. It is needed when tooth loss has caused the sinus to expand downward, leaving too little bone for an implant.
Key facts
A sinus lift (also called sinus augmentation or sub-antral augmentation) is a bone grafting procedure specific to the upper back jaw. When upper molars or premolars are lost, the maxillary sinus — an air-filled cavity above them — expands downward (sinus pneumatization) while the ridge below shrinks. This leaves insufficient bone height for a standard implant. A sinus lift procedure lifts the sinus membrane upward and packs bone graft material beneath it, creating 6–12mm of new bone height over 6–8 months. It is one of the most common pre-implant procedures worldwide and has excellent predictability in experienced hands.
The maxillary sinus is one of four pairs of paranasal sinuses — air-filled spaces within the skull bones that serve to reduce skull weight, humidify air, and contribute to voice resonance. In a dentate patient, the sinus floor sits comfortably above the roots of the upper molars, separated by several millimetres of dense bone. When those teeth are lost, the sinus begins to pneumatize — the air space expands downward and sideways, sometimes by several millimetres per year. Simultaneously, the alveolar ridge resorbs upward from below. Within a few years, the two processes meet, leaving a paper-thin shelf of bone — or nothing at all — between the sinus floor and the ridge crest. Placing a standard 10mm implant into 3mm of remaining bone is not mechanically possible. A sinus lift creates the bone depth that the anatomy no longer provides.
You need a sinus lift when you want a dental implant in the upper back jaw and a CBCT scan shows that the residual bone height between the alveolar crest and the sinus floor is insufficient. For the lateral window technique, this is typically when height is less than 4–5mm. For the minimally invasive crestal technique, the technique is appropriate when 5–8mm of bone exists but a small additional gain of 2–4mm is needed. The decision must be based on CBCT measurements — a 2D OPG significantly underestimates the degree of sinus pneumatization.
Maxillary Sinus
A large air-filled cavity in the upper jaw, just above the roots of the upper molars and premolars. In many patients, the sinus floor drops close to or below the ridge crest after tooth loss, making implant placement impossible without augmentation.
Lateral Window Technique
The classic sinus lift. A small oval window is cut in the lateral sinus wall, the membrane elevated, and graft material packed into the space. Used when bone height is less than 4–5mm. Requires 6–8 months healing before implants can be placed.
Osteotome/Crestal Technique (Summers Technique)
A minimally invasive approach using hand instruments to gently elevate the sinus membrane through the implant site from below. Only possible when there is at least 5–6mm of existing bone. Smaller gain (2–4mm). Can often be combined with simultaneous implant placement.
Schneiderian Membrane
The thin (0.3–1mm) membrane lining the sinus floor. Preserving it intact is the critical step in sinus lift surgery. Membrane perforations — the main intraoperative complication — must be identified and repaired during surgery. A perforated membrane that is not recognised and managed significantly compromises graft outcomes.
Sinus Pneumatization
The progressive expansion of the sinus after tooth loss. The longer the teeth have been missing, the lower the sinus floor drops. CBCT measurement of residual bone height is mandatory before planning any sinus surgery. Sinus anatomy (presence of septa, membrane thickness, existing pathology) must also be assessed.
Sources
From CBCT assessment to implant placement — the complete surgical and healing timeline.
⏱ 9–14 months total (6–8 months graft healing + 3–6 months implant osseointegration; active appointments are minimal)Bone height is measured from the alveolar crest to the sinus floor in millimetres. Sinus anatomy is evaluated — the presence of septa (bony partitions inside the sinus), membrane thickness, and any existing sinus pathology (mucosal thickening, polyps, previous sinusitis). Sinus pathology must be ruled out before surgery; if significant disease is present, ENT review and clearance are required before any sinus augmentation procedure. Contraindications include uncontrolled sinusitis, recent sinus surgery, and certain medications that impair bone healing.
Do not proceed with a sinus lift if you have chronic sinusitis that has not been treated. An infected sinus will contaminate the graft and cause failure.
Under local anaesthesia (with or without IV sedation), a full-thickness mucoperiosteal flap is raised to expose the lateral wall of the maxillary sinus. An oval or trapezoidal window is carefully marked and opened using a piezoelectric ultrasonic instrument (preferred — the ultrasonic tip cuts bone but not soft tissue, significantly reducing membrane perforation risk) or a surgical rotary bur. The thin bony window is then hinged inward to become the new sinus floor, or removed. The Schneiderian membrane is carefully elevated off the sinus floor and walls with curved elevators.
Ask whether your surgeon uses piezoelectric instruments for the osteotomy. Compared to rotary burs, piezo instruments significantly reduce the rate of membrane perforation — the most common and consequential intraoperative complication.
Bone graft material — typically xenograft (bovine bone mineral such as Bio-Oss), allograft, a combination of both, or autograft mixed with a bone substitute — is incrementally packed into the space between the elevated membrane and the sinus floor. The amount of graft material determines the height gain. A collagen membrane is placed over the lateral window before flap closure to prevent soft tissue ingrowth into the graft space.
The mucoperiosteal flap is repositioned and sutured in two layers to achieve watertight primary closure. No gaps in the suture line — contamination from the oral cavity is the primary source of graft infection. Chlorhexidine rinse is prescribed for 2 weeks. Antibiotics for 7 days. Patients are instructed not to blow their nose forcefully for 4 weeks and to sneeze with their mouth open — positive sinus pressure can displace the elevated membrane and disrupt the graft. No smoking for a minimum of 3 months.
Any activity that increases sinus pressure — nose blowing, forceful sneezing, scuba diving, or playing a wind instrument — must be avoided for 4 weeks after surgery. This is one of the most commonly ignored post-operative instructions and a preventable cause of graft failure.
6–8 months for the lateral window technique for the graft to mature into viable bone. During this period the graft material is gradually replaced by host bone through a process called creeping substitution. Implants are placed simultaneously with the sinus lift only if the existing bone height is 4mm or more — the residual bone must be sufficient to provide primary stability to the implant during healing. If less than 4mm of bone remains, a staged approach is used: graft first, implants placed at 6–8 months after confirmed bone gain.
A repeat CBCT is taken at 6–8 months to confirm bone volume, density, and maturation at the grafted site. Implants are placed in the grafted area — typically 10–13mm implants can now be accommodated where previously only 2–3mm of bone existed. Standard osseointegration then follows over 3–6 months before the final crown is fitted. Total time from sinus lift to final restoration: 9–14 months for staged cases.
Do not accept implant placement without a post-graft CBCT. Bone maturation varies between individuals — placing an implant in insufficiently matured graft bone is a common cause of early implant failure.
Lateral window sinus lift: ₹35,000–₹60,000 per side. Crestal (osteotome) technique: ₹15,000–₹25,000 per implant site. Does not include the cost of implants placed afterward.
Based on Capcane's 2026 review of maxillofacial surgical centre pricing across Bangalore.
What does a sinus lift cost in Bangalore by technique?
| Tooth type | Procedure | Crown / add-on | Total |
|---|---|---|---|
Technique choice
The lateral window technique is more involved surgically — it requires raising a larger flap, cutting a bony window, elevating the membrane over a wider area, and packing a larger volume of graft. The crestal technique is minimally invasive but limited in the height gain it can achieve and is only appropriate when sufficient bone already exists.
Instrument type: piezo vs rotary
Piezoelectric instruments cost more to use but significantly reduce the risk of membrane perforation — the most common and consequential intraoperative complication of sinus lift surgery. Clinics using piezo instruments typically charge 15–25% more for the procedure, which is worth paying for the risk reduction.
Graft material
Most sinus lifts in India use xenograft (Bio-Oss or equivalent) or allograft. Autograft (your own bone) is occasionally used for large volume defects but requires a second surgical site. Material costs range from ₹5,000 (alloplast) to ₹15,000 (xenograft or allograft) per side — these should be itemised in your quote.
Staged vs simultaneous implant placement
When implants are placed at the same appointment as the sinus lift (simultaneous approach — possible with ≥4mm residual bone), total surgical appointments are reduced by one. Staged placement requires a second surgical appointment 6–8 months later — adding surgeon fees and anaesthesia costs. Simultaneous placement is more economical when anatomy permits.
Surgeon's specialisation
Sinus lift surgery should be performed exclusively by an Oral & Maxillofacial Surgeon or a Periodontist with documented advanced training in sinus augmentation. The Schneiderian membrane is extremely delicate. Membrane perforation rates in the hands of experienced surgeons are 10–15%; in inexperienced hands this rises significantly. This is not a procedure for a generalist performing occasional implants.
Red flags — watch out for these
A sinus lift is a highly predictable procedure in experienced hands — but it adds cost, surgical risk, and 6–8 months to the treatment timeline. It is also, in many cases, entirely avoidable. Before committing to sinus augmentation, it is worth understanding when it is unavoidable, when modern implant techniques bypass the need, and how to choose a surgeon qualified to perform it safely.
Signs you genuinely need it
Signs you might not need it
Capcane's position
Share your CBCT scan and upper jaw history with us. We measure residual bone height, assess whether the lateral or crestal technique applies, flag any sinus pathology that needs ENT clearance, and tell you honestly whether All-on-4 or short implants make more sense for your situation. We are not associated with any clinic — our only interest is getting you the right answer before you commit to surgery.
Share your CBCT and upper jaw history
WhatsApp us your CBCT scan (or OPG if that is all you have), information on which upper back teeth are missing and when, any history of sinusitis or ENT conditions, and the treatment plan you have been given. We will review the bone height, sinus anatomy, and assess whether a sinus lift is genuinely required or whether an alternative approach exists.
Independent surgical review in 24 hours
An Oral & Maxillofacial Surgeon reviews your scan and determines: whether a sinus lift is unavoidable, which technique is appropriate for your anatomy, whether simultaneous or staged implant placement is feasible, whether All-on-4 bypasses the procedure, and the realistic total cost and timeline — from surgery to final crown.
Matched with a verified sinus augmentation specialist
If a sinus lift is needed, we connect you with a specialist who has documented experience specifically in sinus augmentation — not just general implant placement. We verify: training in advanced bone augmentation, access to CBCT and piezoelectric instruments in-clinic, case volume in sinus procedures specifically, and a transparent complication management protocol.
Real outcomes from real patients.
Vijayalakshmi P.
“Three clinics told me I needed bilateral sinus lifts before any upper implants could be placed. Capcane reviewed my scan and confirmed the sinus lift was genuinely necessary on both sides — but also found that one side had 5mm of bone and could have the implant placed at the same time as the graft, cutting six months off the timeline. That detail alone made a significant difference to how I planned the treatment.”
Karthik M.
“My dentist said I needed bilateral sinus lifts and ridge augmentation before I could get implants — a plan that would have cost me over ₹2,00,000 in grafting alone and added a year to the timeline. Capcane looked at my case and said I was a straightforward All-on-4 candidate. I got a full fixed upper arch with no grafting, no sinus surgery, at a total cost that was actually less. I wish I had gotten this second opinion before my first consultation.”
Get a free, honest second opinion — no commitment, no hidden fees.