CBCT-guided sinus augmentation by board-certified periodontist Dr. Chanook David Ahn. Lateral window and crestal approaches with PRF-enhanced healing. Located in the South Coast Metro area, serving Costa Mesa, Irvine, Newport Beach, Santa Ana, and Tustin.
A sinus lift, also called sinus augmentation or sinus floor elevation, is a bone grafting procedure that adds bone to the upper jaw in the area of the premolars and molars. The procedure elevates the sinus membrane (Schneiderian membrane) upward from its current position on the jaw, and bone graft material is packed into the space created between the jaw and the sinus floor. This new bone provides the volume and density required to anchor dental implants in the posterior maxilla, where bone is naturally thinner and often insufficient after tooth loss.
The maxillary sinuses are air-filled cavities located above the upper back teeth. When upper premolars or molars are lost, the bone that once supported those teeth begins to resorb. Simultaneously, the sinus cavity expands downward into the space formerly occupied by tooth roots in a natural process called pneumatization. Over months and years, this dual process of bone resorption from below and sinus expansion from above can leave as little as one to two millimeters of bone between the crest of the jaw and the sinus floor. Since standard dental implants are typically 8 to 13 millimeters in length, placing an implant without adequate bone would mean perforating through the sinus floor, leading to implant failure and potential sinus complications.
The Schneiderian membrane is a thin mucoperiosteal lining, typically 0.3 to 0.8 millimeters thick, that covers the inner walls and floor of the maxillary sinus. During a sinus lift, this membrane must be carefully elevated from the bone floor without tearing it. Maintaining membrane integrity is critical to the success of the procedure because an intact membrane contains the bone graft material within the space and prevents graft particles from migrating into the sinus cavity. A trained periodontist like Dr. Ahn understands the anatomy and handling characteristics of this delicate tissue, which is why specialist training matters for this procedure.
Sinus lift surgery is one of the most well-documented and predictable procedures in implant dentistry. A systematic review by Pjetursson and colleagues published in Clinical Oral Implants Research (2008) documented a 95 to 97 percent implant survival rate in grafted sinuses, placing sinus augmentation among the most reliable bone grafting procedures performed in dentistry today.
There are two primary techniques for performing a sinus lift, and the choice between them depends on how much bone you currently have and how much bone needs to be added. Dr. Ahn is trained in both approaches and selects the technique that provides the best outcome for each patient's specific anatomy.
The lateral window approach is the gold standard for sinus augmentation when significant bone height needs to be gained. In this technique, Dr. Ahn creates a small window in the lateral (side) wall of the maxillary sinus, carefully elevates the Schneiderian membrane upward, and packs bone graft material into the space created between the existing jawbone and the elevated membrane. This approach can add 8 to 12 millimeters or more of vertical bone height, making it suitable for patients with as little as 1 to 2 millimeters of residual bone. The lateral window technique provides excellent direct visualization of the membrane during elevation, which reduces the risk of membrane perforation. When at least 4 to 5 millimeters of residual bone exists, dental implants can often be placed simultaneously with the sinus lift, reducing the overall treatment timeline.
The crestal approach is a less invasive technique performed through the implant site itself. Rather than creating a separate window in the sinus wall, Dr. Ahn uses osteotomes or a hydraulic technique to gently push the sinus floor upward from below and place a small amount of bone graft material through the implant preparation site. This approach is best suited for cases requiring moderate augmentation of 2 to 4 millimeters, typically when at least 5 to 6 millimeters of residual bone is present. The crestal technique involves less surgical trauma, results in faster recovery, and almost always allows for simultaneous implant placement in the same appointment.
Sinus lift surgery requires an in-depth understanding of sinus anatomy, membrane biology, bone graft physiology, and microsurgical technique. While oral surgeons, periodontists, and some general dentists all perform sinus lifts, a board-certified periodontist brings a unique combination of training in both hard and soft tissue management that is directly relevant to sinus augmentation. The Schneiderian membrane is a mucoperiosteal tissue, and periodontists spend years of residency training learning to handle mucoperiosteal tissues with precision. This training translates directly into lower membrane perforation rates and higher graft success rates.
Dr. Chanook David Ahn is board-certified by the American Board of Periodontology, a distinction held by fewer than 40 percent of practicing periodontists. His residency training at Yale-New Haven Hospital and the VA Greater Los Angeles Healthcare System (UCLA-affiliated) included extensive experience with regenerative procedures, bone grafting, and implant site development. His training under some of the country's leading periodontists gave him a deep understanding of the biological principles that govern bone graft incorporation and tissue healing, knowledge that is applied to every sinus lift case he performs at The Loft Dental Studio.
Board certification matters because sinus lift surgery is not simply a mechanical procedure. The choice of graft material, membrane handling technique, membrane repair protocols when perforations occur, and the decision of whether to place implants simultaneously or stage the procedure all require clinical judgment grounded in regenerative biology. A board-certified periodontist has demonstrated mastery of these concepts through rigorous examination by the American Board of Periodontology.
The sinus lift is one of the most predictable bone grafting procedures in dentistry when performed by a specialist who understands membrane biology and graft physiology. Sinus floor augmentation has a documented 95 to 97 percent implant survival rate in grafted sinuses (Pjetursson et al., Clinical Oral Implants Research, 2008). At our practice, success begins with CBCT-guided surgical planning that identifies sinus septa, measures membrane thickness, and maps the exact anatomy before we make a single incision. Combined with PRF therapy to accelerate healing, this evidence-based approach consistently produces bone that is dense enough and tall enough to support implants that last decades.
Understanding what happens during a sinus lift helps patients feel more confident and prepared. Here is the step-by-step process Dr. Ahn follows at The Loft Dental Studio.
Every sinus lift begins with a CBCT (cone beam computed tomography) 3D scan. This advanced imaging reveals the three-dimensional anatomy of the maxillary sinus with sub-millimeter precision, including residual bone height, sinus floor contour, the presence and location of sinus septa (bony partitions within the sinus), membrane thickness, and proximity to adjacent anatomical structures. Dr. Ahn uses this information to select the appropriate surgical approach (lateral window vs. crestal), plan the exact location and dimensions of the bony window or osteotomy, and determine whether simultaneous implant placement is possible.
The procedure is performed under local anesthesia to ensure complete numbness of the surgical area. For patients who experience dental anxiety or who prefer a more relaxed experience, IV conscious sedation is available. IV sedation allows Dr. Ahn to titrate medication in real time, providing deep relaxation while the patient remains conscious and breathing independently. Nitrous oxide (laughing gas) and oral sedation are also available for patients with mild to moderate anxiety. Learn more about our sedation options.
For the lateral window approach, Dr. Ahn creates a small opening in the lateral wall of the maxillary sinus using piezoelectric instruments that cut bone precisely without damaging the underlying soft tissue membrane. The Schneiderian membrane is then carefully elevated from the sinus floor using specialized hand instruments, creating a tent-like space above the existing bone. For the crestal approach, the sinus floor is gently pushed upward using osteotomes or a hydraulic technique through the implant preparation site. In both approaches, maintaining the integrity of the Schneiderian membrane is the most critical step of the procedure.
Once the membrane is elevated, bone graft material is carefully packed into the space created between the jawbone and the elevated membrane. Dr. Ahn selects graft materials based on each case's requirements, using allograft (processed human donor bone), xenograft (bovine-derived bone mineral), or a combination. The graft material serves as a scaffold that the body gradually replaces with new living bone over the following months.
Dr. Ahn incorporates PRF (Platelet-Rich Fibrin) therapy into sinus lift procedures. PRF is prepared from a small sample of the patient's own blood, which is centrifuged during the procedure to concentrate growth factors and fibrin into a membrane. This PRF membrane is placed over the graft site, delivering a concentrated dose of the body's own healing and growth factors directly where they are needed. PRF has been shown to accelerate soft tissue healing, reduce post-operative inflammation, and support bone graft integration.
If residual bone is sufficient (typically 4 to 5 millimeters or more for the lateral approach, 5 to 6 millimeters for the crestal approach), dental implants are placed during the same surgical appointment. The implants achieve primary stability in the existing native bone while the graft material matures around them. When residual bone is insufficient for simultaneous placement, the site is closed with resorbable sutures and allowed to heal for 6 to 9 months. A follow-up CBCT scan confirms adequate bone density and volume before implants are placed in a second procedure.
Find out if you have enough bone for dental implants. Dr. Ahn provides CBCT-guided evaluations and honest, no-pressure treatment recommendations.
Call (714) 549-7030Sinus lift costs vary depending on the surgical approach, the complexity of the case, the type and volume of bone graft material used, and whether implants are placed simultaneously. At The Loft Dental Studio, we provide detailed cost estimates after your CBCT evaluation so you understand exactly what your treatment will involve and what it will cost before proceeding.
Some PPO dental insurance plans cover a portion of sinus lift surgery under oral surgery or implant-related benefits. Medical insurance may also provide coverage when the procedure is deemed medically necessary. Coverage varies significantly by plan and by insurer. Our administrative team contacts your insurance provider before treatment to verify your exact benefits and provide a written estimate of your out-of-pocket cost.
PPO Plans We Accept: Delta Dental, Cigna, MetLife, Guardian, Aetna, United Healthcare, and Blue Cross Blue Shield.
We offer financing through CareCredit, which provides low-interest and interest-free payment plans for patients who prefer to manage costs over time. We also accept FSA (Flexible Spending Account) and HSA (Health Savings Account) funds, allowing you to pay for your sinus lift with pre-tax dollars. For more details, visit our Insurance & Payment page.
Recovery from sinus lift surgery is straightforward when patients follow post-operative instructions carefully. Here is what Costa Mesa patients typically experience.
You may be a candidate for a sinus lift if you are missing one or more upper back teeth (premolars or molars) and plan to replace them with dental implants but do not have enough bone height between the jaw crest and the sinus floor. Generally, dental implants in the posterior maxilla require at least 10 millimeters of bone height for long-term success. When a CBCT scan reveals less than this threshold, a sinus lift is typically recommended before or during implant placement.
Certain conditions may affect candidacy for sinus lift surgery or require special management:
Dr. Ahn's Save-First Philosophy: Before recommending extraction and implants with a sinus lift, Dr. Ahn always evaluates whether the natural tooth can be saved. If a compromised tooth has a viable prognosis with periodontal treatment such as LANAP laser gum treatment or guided bone regeneration, he will present that option first. Implants are an excellent solution when a tooth truly cannot be saved, but preserving natural teeth is always preferred when clinically justified.
Successful sinus lift surgery depends on precise pre-operative planning, and precise planning depends on accurate imaging. At The Loft Dental Studio, Dr. Ahn uses CBCT (cone beam computed tomography) to obtain a three-dimensional view of the maxillary sinus and surrounding anatomy before every sinus lift procedure. This in-office technology captures the entire sinus complex in a single scan that takes less than 30 seconds.
Traditional two-dimensional dental X-rays (periapical and panoramic radiographs) provide only a flat, overlapping view of the jaw and sinus. They cannot accurately measure bone height because of magnification distortion, they cannot reveal sinus septa (bony walls within the sinus that complicate membrane elevation), and they provide no information about bone width or density. A CBCT scan eliminates all of these limitations.
Two-dimensional X-rays are useful for initial screening, but they are insufficient for planning sinus lift surgery. Any provider recommending a sinus lift without a CBCT scan is planning the procedure with incomplete information. At The Loft Dental Studio, CBCT imaging is standard for every sinus lift case.
Most patients report that sinus lift surgery is far less painful than they expected. The procedure is performed under local anesthesia, with IV sedation available for patients who prefer complete comfort. Post-operative discomfort is typically managed with over-the-counter ibuprofen and prescription pain medication for the first 2 to 3 days. Swelling peaks around days 2 to 3 and then gradually subsides. Most patients describe the recovery as similar to a tooth extraction. Dr. Ahn also uses PRF (Platelet-Rich Fibrin) therapy to accelerate healing and reduce post-operative inflammation.
Healing time depends on the approach used and whether implants were placed simultaneously. For a lateral window sinus lift without simultaneous implant placement, the bone graft typically requires 6 to 9 months to mature before implants can be placed. When a crestal sinus lift is performed with simultaneous implant placement, the implant integrates with the bone over 4 to 6 months. Dr. Ahn uses CBCT 3D imaging to monitor graft maturation and determines the optimal time for implant placement based on actual bone density, not arbitrary timelines.
Yes, in many cases. Simultaneous sinus lift and implant placement is possible when there is at least 4 to 5 millimeters of residual bone height beneath the sinus to stabilize the implant during healing. This is common with the crestal approach and sometimes possible with the lateral window technique. When residual bone is less than 4 millimeters, a staged approach is recommended: the sinus lift is performed first, the graft matures for 6 to 9 months, and then implants are placed into the newly formed bone. Dr. Ahn evaluates your CBCT scan to determine which approach provides the best long-term outcome for your situation.
Sinus lift surgery has a high success rate (95 to 97 percent), but like any surgical procedure, it carries some risks. The most common complication is perforation of the Schneiderian membrane, which occurs in approximately 10 to 25 percent of cases and is typically repaired during the procedure with a collagen membrane patch. Other risks include post-operative sinus infection (sinusitis), graft failure, bleeding, and swelling. Serious complications are rare. Dr. Ahn uses CBCT 3D imaging to plan each procedure and identify anatomical variations like sinus septa that increase perforation risk, allowing him to adjust his technique accordingly.
You may need a sinus lift if you are missing upper back teeth and do not have enough bone height between the jaw crest and the sinus floor to support dental implants. Generally, implants in the posterior maxilla require at least 10 millimeters of bone height. A CBCT 3D scan measures your exact bone height with sub-millimeter accuracy. Common reasons for insufficient bone include long-term tooth loss (the sinus expands downward over time through pneumatization), periodontal disease, and natural anatomical variation. Schedule a consultation with Dr. Ahn for a definitive evaluation.
Dr. Ahn selects bone graft material based on the specific requirements of each case. Options include allograft (processed human donor bone), xenograft (bovine-derived bone mineral such as Bio-Oss), and synthetic bone substitutes. In many cases, a combination of materials is used to optimize the graft properties. All graft materials used at The Loft Dental Studio are sourced from FDA-regulated tissue banks and undergo rigorous processing and sterilization. Dr. Ahn also uses PRF (Platelet-Rich Fibrin) derived from the patient's own blood to enhance graft integration and accelerate healing.
Some PPO dental insurance plans cover a portion of sinus lift surgery under their oral surgery or implant-related benefits. Medical insurance may also cover the procedure if it is deemed medically necessary. Coverage varies significantly by plan. The Loft Dental Studio accepts most major PPO dental insurance plans including Delta Dental, Cigna, MetLife, Guardian, Aetna, United Healthcare, and Blue Cross Blue Shield. Our administrative team verifies your benefits before treatment so you understand your out-of-pocket costs upfront. Financing through CareCredit and FSA/HSA accounts are also accepted.
A sinus lift procedure typically takes 60 to 90 minutes per side, depending on the approach used and the complexity of the case. A crestal sinus lift is generally faster, taking 30 to 45 minutes, as it is performed through the implant site. A lateral window sinus lift takes 60 to 90 minutes because it involves creating a separate access window in the lateral sinus wall. If bilateral sinus lifts are needed (both sides), they can sometimes be completed in a single appointment. Dr. Ahn discusses the expected duration during your consultation after reviewing your CBCT scan.