Quick answer
A sinus lift is a bone-augmentation procedure used when there is insufficient bone beneath the maxillary sinus for an implant in the back of the upper jaw. The sinus lining is carefully elevated and space is created for new bone. The implant may be placed during the same procedure when adequate stability is possible, or after the graft has healed in a staged approach.
The maxillary sinuses are air-filled spaces located above the upper premolar and molar teeth. After these teeth are lost, the remaining bone beneath the sinus may be too limited to support implants in the planned restorative positions.
A sinus lift—also called sinus floor elevation or sinus augmentation—creates additional vertical bone in this region. It is a specialised type of augmentation rather than a procedure required for every upper-jaw implant.
This guide explains why a sinus lift may be recommended, how internal and lateral approaches differ, when implants can be placed and what patients should understand about healing and risks.
Sinus Lift at a Glance
| Question | Short answer |
|---|---|
| Where is it performed? | At implant sites in the back of the upper jaw beneath the maxillary sinus |
| Why is it needed? | To create sufficient bone height for a planned implant |
| Is it required for every upper implant? | No; only selected sites with insufficient bone or unsuitable anatomy require it |
| Can the implant be placed simultaneously? | Sometimes, when enough native bone remains to stabilise the implant |
| Can it be staged? | Yes; the graft may heal before implant placement when stability cannot be achieved |
| How is it planned? | Using clinical examination, restorative planning and appropriate three-dimensional imaging |
What Is the Maxillary Sinus?
The maxillary sinuses are hollow spaces located on both sides of the nose, above the posterior upper teeth and below the eyes. Each sinus is lined by a thin tissue layer commonly called the sinus membrane.
The roots of upper premolars and molars can lie close to the sinus floor. After these teeth are removed, the remaining ridge may become shorter while the sinus occupies more of the available vertical space.
A sinus lift elevates the membrane from the underlying jawbone and creates a protected space where graft material and new bone formation can provide support for dental implants.
Why Might You Need a Sinus Lift?
A sinus lift may be considered when the upper posterior jaw does not contain enough vertical bone for the selected implant.
Possible reasons include:
- Long-term absence of upper premolar or molar teeth
- Bone remodelling after extraction
- Periodontal bone loss
- Previous dental infection
- Naturally large or low-positioned maxillary sinuses
- Trauma or previous surgery
- Loss of an implant and surrounding bone
The presence of limited bone does not automatically prove that a sinus lift is the only solution. Implant dimensions, restorative design, available bone in other positions and non-implant alternatives must also be considered.
How Do Dentists Determine Whether You Need a Sinus Lift?
The decision is based on more than one vertical measurement.
The clinical team may assess:
- The position of the planned implant crown or bridge
- Residual bone height beneath the sinus
- Width and shape of the remaining ridge
- Sinus-floor anatomy and internal partitions called septa
- Thickness and condition of the sinus lining
- Signs of sinus disease or dental infection
- The number and dimensions of proposed implants
- Whether primary implant stability can be achieved
- Smoking, medical history and healing risks
The correct procedure should follow restoration-driven implant planning. The objective is not simply to place an implant somewhere beneath the sinus, but to support a functional restoration in an appropriate position.
Why Is CBCT Important for Sinus-Lift Planning?
A panoramic X-ray can provide an initial two-dimensional overview of the sinus and remaining bone. When a sinus lift is being considered, a CBCT scan commonly provides clinically important three-dimensional information.
CBCT may help assess:
- Residual bone height and width
- The shape and width of the sinus
- The presence of sinus septa
- Membrane thickening or other findings requiring assessment
- The relationship of neighbouring tooth roots
- The intended implant angle, length and position
- The amount and location of augmentation required
CBCT findings must be interpreted with the patient’s symptoms and clinical examination. A radiographic sinus finding does not automatically establish a diagnosis or determine treatment by itself.
Learn more about CBCT scans before dental implants.
What Are the Main Types of Sinus Lift?
Two principal approaches are used. The names describe how the clinician reaches and elevates the sinus floor.
Internal Sinus Lift
An internal sinus lift is also called a transcrestal or crestal sinus-floor elevation.
The sinus is accessed through the implant preparation site in the ridge. The floor is elevated from below, and graft material may be introduced into the created space. The implant is normally placed during the same procedure.
This approach is generally considered when:
- A limited increase in bone height is required
- Sufficient ridge width exists
- The sinus-floor anatomy is suitable
- Enough native bone remains to stabilise the implant
Lateral-Window Sinus Lift
A lateral sinus lift accesses the sinus through a carefully prepared window in the outer wall of the upper jaw.
The sinus membrane is elevated, graft material is placed beneath it and the access may be protected with a membrane before the gum is closed.
This approach may be considered when:
- A larger vertical increase is required
- Residual bone height is substantially limited
- The anatomy is unsuitable for a crestal approach
- Several implants are planned in the posterior upper jaw
- A wider area requires augmentation
Internal vs Lateral Sinus Lift
| Feature | Internal approach | Lateral-window approach |
|---|---|---|
| Access | Through the implant preparation site | Through a window in the outer sinus wall |
| Typical augmentation | More limited elevation | Suitable for a larger augmentation area |
| Implant timing | Usually placed simultaneously | May be simultaneous or staged |
| Need for existing bone | Enough bone must remain for implant stability | Can be used when residual bone is more limited |
| Surgical access | Less extensive access | Provides direct visibility of the membrane and graft area |
Neither approach is universally better. The selection depends on anatomy, required elevation, implant stability and clinician experience.
Can the Sinus Lift and Implant Be Performed Together?
Yes, a sinus lift and implant may be performed during the same surgical appointment when enough native bone remains to stabilise the implant in its planned position.
A simultaneous approach may reduce the number of surgical stages because sinus graft healing and implant integration occur during the same general period.
However, simultaneous placement should not be used when primary stability cannot be achieved. In that situation, the graft may need to heal before implant placement.
When Is a Staged Sinus Lift Required?
A staged approach separates the treatment into two surgical phases:
- The sinus membrane is elevated and the graft is placed.
- The grafted area heals and matures.
- The site is reassessed clinically and radiographically.
- The implant is placed during a later procedure.
- A separate period of osseointegration follows.
- The final crown or bridge is produced after readiness is confirmed.
Staged treatment is more likely when the residual bone cannot provide suitable implant stability or when the augmentation is extensive.
What Happens During a Lateral Sinus-Lift Procedure?
The exact technique varies, but the procedure may include:
- Local anaesthesia and surgical preparation
- Access to the outer wall of the upper jaw
- Creation of a controlled lateral window
- Careful elevation of the sinus membrane
- Placement of graft material beneath the elevated membrane
- Implant placement when suitable stability is possible
- Protection of the access area with a membrane when indicated
- Closure of the gum with sutures
The implant may be omitted during this operation if the native bone cannot stabilise it safely.
What Happens During an Internal Sinus Lift?
For an internal approach, the clinician prepares the implant site through the ridge and carefully elevates the sinus floor from below.
Graft material may be placed beneath the sinus lining, and the implant is inserted to help stabilise the site.
Because access is indirect, careful case selection is essential. The approach is generally used when only a limited increase in bone height is needed and sufficient native bone exists for implant stability.
What Graft Materials Are Used?
Sinus augmentation may use:
- Bone collected from the patient
- Processed human donor material
- Processed animal-derived material
- Synthetic bone substitute
- A combination of materials
A membrane may also be used to cover the lateral access window or protect the graft.
No single graft material is suitable for every patient or technique. Patients should be told whether the proposed graft or membrane contains human- or animal-derived material before consent.
For a broader explanation, read bone grafting for dental implants.
How Long Does a Sinus Lift Take to Heal?
Healing depends on the approach, residual bone, graft size, graft material, implant timing and individual response.
When a lateral sinus lift is completed before implant placement, the augmented area may require approximately four to nine months before implants are placed. After implant placement, an additional period of osseointegration is usually necessary.
Cambridge University Hospitals states that the complete timeframe from sinus-lift surgery to dental restoration may range from approximately six to twelve months and can sometimes be longer.
When the implant and sinus lift are performed together, the complete pathway may be shorter because the graft and implant heal during the same phase.
Is a Sinus Lift Painful?
The procedure is commonly performed under local anaesthesia. Sedation or another anaesthetic approach may be considered according to procedure complexity, patient needs and the clinical setting.
Pressure or vibration may be noticeable during surgery, but sharp pain should be controlled by adequate anaesthesia.
Afterward, discomfort, swelling, bruising, minor nasal bleeding or a temporary feeling of sinus fullness can occur. A lateral approach commonly produces more postoperative swelling than a small internal elevation.
What Is Normal After a Sinus Lift?
Expected postoperative effects may include:
- Swelling that becomes more noticeable during the first two days
- Bruising of the cheek or jaw
- Tenderness around the surgical area
- Minor blood-stained saliva
- Limited nasal bleeding
- A blocked or full sensation around the sinus
- Awareness of sutures
Patients should receive procedure-specific written instructions. General implant advice may not cover the additional precautions required after sinus augmentation.
Why Should You Avoid Blowing Your Nose?
Forceful nose blowing raises pressure inside the sinus and may disturb the healing membrane or grafted area.
Cambridge University Hospitals advises patients not to blow their nose for two weeks after sinus-lift surgery. Individual instructions may differ, so the operating surgeon’s directions take priority.
Patients should also ask how to manage sneezing, nasal congestion and prescribed nasal medication. Do not start a decongestant or nasal spray without clinical advice.
Can You Fly After a Sinus Lift?
Air travel changes cabin pressure and may cause sinus discomfort. There is no single evidence-based waiting period suitable for every sinus-lift patient.
The decision depends on:
- Whether the membrane remained intact
- The extent of surgery
- Nasal or sinus symptoms
- Bleeding and swelling
- Presence of infection
- Flight duration and medical risk factors
International patients should tell the surgeon their intended flight date before treatment and obtain individual clearance. A return ticket should not determine the surgical plan.
What Is a Sinus-Membrane Perforation?
A membrane perforation is a tear in the sinus lining during elevation. It is one of the main procedure-specific complications.
A small perforation may sometimes be repaired or protected during surgery. A larger or uncontrolled tear may require the procedure to be modified or stopped and repeated after healing.
A perforation does not automatically mean that the final implant treatment will fail, but it changes clinical management and may extend the timeline.
What Are the Other Risks of a Sinus Lift?
Potential risks include:
- Sinus-membrane perforation
- Bleeding or nosebleed
- Infection
- Graft exposure or loss
- Insufficient new bone formation
- Persistent sinus symptoms
- Temporary altered sensation
- Communication between the mouth and sinus
- Need for additional grafting or surgery
- Implant failure
The risk profile differs between a small internal elevation and an extensive lateral-window graft. Consent should relate to the exact procedure proposed.
When Should You Contact the Clinic?
Patients should seek professional advice if they experience:
- Pain or swelling that continues worsening after the first two days
- Fever or feeling generally unwell
- Persistent or heavy bright-red bleeding
- Pus or an unpleasant discharge
- Air or liquid passing unexpectedly between the mouth and nose
- Graft material apparently displaced after nose blowing or sneezing
- Persistent severe sinus pressure
- A loose implant, healing component or temporary restoration
- Symptoms that are not improving as expected
These symptoms do not prove a particular complication, but they should be assessed promptly.
Can You Have a Sinus Infection Before a Sinus Lift?
Active or uncontrolled sinus disease may need assessment and treatment before augmentation. Symptoms such as recurrent sinus infections, nasal obstruction, facial pressure or persistent discharge should be disclosed during planning.
Depending on the symptoms and CBCT findings, consultation with an ear, nose and throat specialist may be appropriate before implant surgery.
A radiographic finding alone does not necessarily prevent treatment, but it should not be ignored.
Can Smoking Affect Sinus-Lift Healing?
Smoking can negatively affect wound and bone healing and may increase the risk of graft complications. Patients must disclose cigarette, vaping and nicotine use before surgery.
Stopping smoking should be discussed before treatment rather than waiting until the day of surgery. Read our guide to smoking and dental implants.
Can a Sinus Lift Be Avoided?
Possible alternatives in selected cases include:
- Shorter implants
- Angled implants positioned away from the sinus
- A different number or distribution of implants
- An implant-supported bridge with a modified design
- A tooth-supported bridge
- A removable partial denture
- Leaving the space untreated when function permits
- Specialised pterygoid or zygomatic implants in complex full-arch cases
Alternatives may introduce different surgical, restorative or maintenance risks. Avoiding sinus augmentation is beneficial only when the alternative plan remains safe, functional and cleanable.
Can the Need for a Sinus Lift Be Confirmed Before Travel?
A preliminary assessment may be supported by:
- Medical and dental history
- Information about sinus symptoms
- A recent panoramic X-ray
- Original CBCT files in DICOM format
- Clear photographs of the mouth
- Details of missing teeth and previous procedures
Remote records may help estimate whether an internal, lateral or staged approach is likely. The final plan can change after an in-person examination, updated imaging and direct evaluation of the gums, bone and implant stability.
How Many Trips to Istanbul May Be Needed?
Simultaneous Sinus Lift and Implant Placement
The sinus lift and implant may be completed during the first surgical phase, followed by healing and a later restorative visit for the final crown or bridge.
Staged Sinus Lift
The first phase involves sinus augmentation. Implant placement occurs after graft healing, and the final restoration follows implant integration. This may require three clinical phases rather than two.
Travel arrangements should include an appropriate postoperative review. The number of hotel nights and return visits must be based on the specific procedure rather than a universal package.
Questions to Ask Before a Sinus Lift
- How much natural bone remains beneath my sinus?
- Why is a sinus lift required for the planned restoration?
- Is an internal or lateral approach proposed?
- Can the implant be placed during the same procedure?
- What happens if adequate implant stability cannot be achieved?
- What graft and membrane materials will be used?
- Are any materials derived from human or animal sources?
- What sinus-related risks exist in my case?
- Do my sinus symptoms require ENT assessment?
- How long should I avoid nose blowing?
- When will I be assessed before flying?
- How will graft healing be confirmed?
- What are the alternatives if I do not want a sinus lift?
The Bottom Line
A sinus lift creates additional bone beneath the maxillary sinus when an implant cannot otherwise be supported appropriately in the back of the upper jaw.
An internal approach may be suitable when only limited elevation is required and enough native bone remains to stabilise the implant. A lateral-window approach provides access for larger augmentation and may be completed with the implant or as a separate first stage.
The decision must be based on restoration-driven planning, clinical examination and appropriate three-dimensional imaging. Treatment should not be promised solely from a panoramic X-ray or remote photograph.
For the broader implant assessment, visit our dental implants in Turkey page. For the complete grafting guide, read Do you need a bone graft for dental implants?
Medical references
- Cambridge University Hospitals NHS Foundation Trust. Sinus Lift Procedures
- International Team for Implantology (ITI), 4th ITI Consensus Conference. Bone Augmentation Procedures in Extended Alveolar Ridge Defects
- International Team for Implantology (ITI); Karthik Sivaraman. Sinus Floor Elevation in Implant Dentistry
- International Team for Implantology (ITI). Overview of Sinus Floor Elevation Procedures in Implant Dentistry
- International Team for Implantology (ITI); Papaspyridakos P, Chen MC and Weber HP. Loading Protocols for Fixed Prostheses in Edentulous Jaws
FAQ
A sinus lift is a bone-augmentation procedure that elevates the maxillary sinus lining and creates space for new bone. It is used when insufficient bone exists for an implant in the back of the upper jaw.
You may need a sinus lift when the remaining bone beneath the maxillary sinus cannot support an implant in the planned position. This may result from tooth loss, bone resorption, infection, periodontal disease or natural sinus anatomy.
No. A sinus lift is considered only when bone beneath the sinus is insufficient for the planned implant. Many upper-jaw sites have adequate bone, while selected cases may use another implant position or dimension.
The dentist combines clinical examination, restorative planning and imaging. CBCT can help evaluate residual bone, ridge width, sinus anatomy, septa and the intended three-dimensional implant position.
An internal sinus lift elevates the sinus floor through the implant preparation site and is generally used for limited elevation. A lateral sinus lift uses a window in the outer sinus wall and can address larger augmentation requirements.
Yes, when enough native bone remains to stabilise the implant correctly. If adequate primary stability cannot be achieved, the sinus graft is usually allowed to heal before implant placement.
After a staged lateral sinus lift, implant placement may occur after approximately four to nine months of graft healing. The timing varies according to residual bone, graft size, material and clinical healing.
The period from sinus augmentation to the final dental restoration may take approximately six to twelve months and sometimes longer. Simultaneous sinus lifting and implant placement may shorten the pathway compared with staged treatment.
The procedure is normally performed under local anaesthesia, with sedation considered in selected cases. Swelling, bruising, pressure and discomfort can occur afterward, particularly following a lateral-window procedure.
One of the main procedure-specific risks is perforation of the sinus membrane. A small tear may sometimes be repaired during surgery, while a larger tear may require the procedure to be modified or postponed.
Forceful nose blowing increases pressure inside the sinus and may disturb the healing membrane or graft. Patients must follow their surgeon’s instructions; some hospital guidance advises avoiding nose blowing for two weeks.
Flying should be discussed individually with the surgeon because cabin-pressure changes may cause sinus discomfort. Clearance depends on procedure extent, membrane integrity, symptoms, infection risk, healing and flight duration.
Yes. Infection, graft exposure, membrane complications or insufficient new bone may prevent the planned implant treatment. The site may require further healing, additional grafting or a revised restorative approach.
Sometimes. Shorter or angled implants, modified implant distribution, bridges or removable restorations may avoid sinus augmentation in selected patients. The alternative must remain safe, stable, functional and maintainable.
Original CBCT DICOM files and medical information may support preliminary planning, but the final procedure cannot always be guaranteed remotely. In-person examination and updated imaging may change the approach or implant timing.
This article is for educational purposes only and does not replace a clinical examination, CBCT analysis, diagnosis, or personalized treatment plan from a qualified dental professional. Implant treatment options vary by bone volume, soft tissue condition, medical history, bite forces, hygiene ability, and long-term maintenance requirements. A final recommendation can only be made after consultation with an implant dentist or prosthodontist.