Transsinusal implantation

Transsinus implantation is a method of placing dental implants in the upper jaw when there is insufficient bone tissue and the maxillary sinus has dropped, occupying most of the upper jaw volume. In such cases, standard implants often cannot be placed without bone grafting. The transsinus technique allows the implant to be anchored in denser anatomical zones while carefully preserving the sinus membrane. This is a highly complex surgery, and there are only a few specialists in Belarus who perform this procedure regularly. At the SHEDO clinic, dental implantation in complex cases is one of our primary specialties. Our experienced surgeons perform transsinus implantations following strict planning and safety protocols.

Key Features of the Method

The main parameters help to understand how transsinus implant placement is performed and what to expect in terms of timeline:

• Number of implants installed — usually 4–6 per arch (for full mouth reconstruction).
• Implant brand — only implants designed specifically to work in soft bone tissue.
• Installation conditions — upper jaw, severe bone atrophy, large sinus detected on CT scan.
• Suitable prosthesis — a temporary non-removable prosthesis is often fixed within the first few days, and a permanent one is placed after complete osseointegration.
• Installation feature — long, tilted implants are anchored in dense bone areas adjacent to the sinus walls.

The doctor determines the exact number of implants, the type of prosthesis, and the overall treatment plan only after a thorough diagnosis and a 3D CT scan, as every patient's anatomy is unique. Based on this plan, the specific transsinus implants are selected, including their length, angle, and components for the future prosthesis.

The Essence of Transsinus Implantation

It is important to understand what transsinus dental implantation is and what its benefits are. This technique is an alternative for upper jaw implantation when bone volume is scarce. When teeth are missing for a long time, the bone gradually decreases in volume (due to atrophy), while the sinus cavity expands. Because of this, a standard implant might turn out to be too short or may protrude into the sinus cavity.

With the transsinus technique, the surgeon plans the tilt of the implant so that it rests on denser bone areas, gaining immediate stability right after placement. At the same time, the surgeon must account for the shape of the sinus, wall thickness, vessel placement, bone quality, and the load direction of the future prosthesis. A mistake of even a single millimeter can affect the stability of the implant and the patient's comfort.

In modern dentistry, a computed tomography (CT) scan is performed before the surgery to create a digital plan: where the implants will be placed, at what angle, what length, which abutments are suitable, and how the chewing load will be distributed. During the procedure, the doctor works with extreme care: the sinus membrane is not damaged; it is gently displaced to create space for the implant. This is why transsinus is considered an alternative to massive bone grafting and, in most cases, a gentler alternative to zygomatic implants.

The easiest way to visualize this is as follows: with transsinus implant placement, the upper part goes into areas where the bone is denser, anchoring itself much more securely than it would in the spongy bone of the alveolar ridge. This allows for a quicker transition to prosthetics, restoring the patient's teeth, chewing function, and smile.

Why Only MEGAGEN Implants Are Suitable for This Method

In transsinus implantation, success depends not only on the surgeon's skill but also on the implant system itself: its shape, surface, connection type with the abutment, and the instrument kit. Immediate stability and precise orthopedic components are particularly crucial in this method, which is why in many modern clinics, transsinus implants are performed using the MEGAGEN system.

These implants feature models designed specifically for the soft bone tissue of the upper jaw (including options for highly spongy bone, such as the AnyRidge line), as well as fully compatible components for prosthetics and digital planning. For the patient, this translates into a highly predictable result: implantation and prosthetics function as a single, unified system, eliminating the need to adapt and "fit" components from different brands.

When Transsinus Implantation Is Needed

Patients often face the problem of needing implants when there is almost no bone left. In such situations, transsinus is frequently considered. Consequently, several scenarios can be identified where dental clinics recommend this service to patients:

• prolonged absence of teeth in the upper jaw and severe bone tissue atrophy;
• sinus "pneumatization": the sinus has expanded and occupied the space where the implant should go;
• unsuccessful experience with removable dentures (the prosthesis chafes, holds poorly, or alters speech);
• contraindications or the patient's reluctance to undergo bone grafting or a sinus lift;
• the need to quickly restore a full dentition and distribute the load evenly.

In addition, there are typical indications. The doctor makes the final decision after diagnostics, as each case is complex and unique.

Indications:

• Complete or near-complete tooth loss in the upper jaw when non-removable prosthetics are planned.
• Severe bone deficit in the lateral regions of the upper jaw.
• Situations where a standard sinus lift does not provide a reliable base or excessively delays treatment.
• Need for immediate or early loading (when a temporary prosthesis can be fitted quickly).
• Complex anatomical conditions where treatment alternatives are limited.

Sometimes patients are offered alternatives — this is completely normal. However, it is worth understanding how transsinus differs from other solutions:

• sinus lift and standard implant placement (takes longer and involves additional surgical stages);
• pterygoid implant placement (anchoring support in the posterior regions, which is not suitable for everyone);
• zygomatic implantation (a highly effective technique, but usually more invasive).

There is no single "best" universal method. The doctor chooses the technology based on your bone volume, bite, gum condition, and general medical risks.

It is also important to consider contraindications, which can be both general and local:

• active inflammatory processes in the oral cavity, untreated caries, or periodontitis in the acute stage;
• diseases or chronic inflammation of the sinus (e.g., frequent flare-ups of sinusitis) until the condition is fully stabilized;
• severe systemic diseases in the stage of decompensation (when any surgical intervention carries high risks);
• blood clotting disorders or taking certain medications without prior agreement with the treating physician;
• uncontrolled diabetes or severe immune disorders;
• active oncological treatment or recent radiation therapy to the head and neck area;
• pregnancy — implantation is typically postponed to a safer period.

In actual practice, many contraindications turn out to be temporary. For example, if there is gum inflammation, treatment and professional hygiene are performed first, and then the question of implantation is revisited. Therefore, it is important to come for a consultation and receive a clear plan: what we are doing now, what we will do later, and how this affects the timeline and cost.

How Transsinus Implantation Is Performed

The success of the operation depends on preparation, precise planning, and professional prosthetics. Below is the typical patient journey, which helps you understand the logic of the treatment and ask the right questions:

1. Diagnostics and planning. The doctor takes a medical history, examines the teeth and gums, and orders a CT scan of the upper jaw and sinuses. The scans help assess bone volume, sinus condition, tissue quality, and potential risks. A plan is then created: how many implants will be used, where they will be placed, and what the prosthesis will look like.
2. Oral cavity preparation. Before surgery, caries and inflammation are treated, and if necessary, severely damaged teeth and roots are removed. This minimizes the risk of complications and helps the implants integrate smoothly.
3. Surgical stage — implant placement. The procedure is performed under local anesthesia, sometimes with sedation (if indicated). The surgeon creates access, works carefully in the sinus area, gently displaces the membrane, and places the implants at the planned angles.
4. Orthopedic stage — temporary prosthesis. If initial stability is high and the anatomical situation allows, the patient receives a temporary non-removable prosthesis within a short timeframe. It is lightweight so as not to overload the healing implants, but it allows the patient to smile and speak normally.
5. Osseointegration period and follow-up. During this time, it is vital to follow recommendations regarding diet, hygiene, and prescribed medications. Follow-up visits are conducted, and if necessary, adjustments to the prosthesis, replacement of healing abutments, and bite alignment are made.
6. Permanent prosthetics. After osseointegration, a permanent structure is installed: this can be a bridge or crowns united into a single system with screw retention. The material, tooth shape, and bite height are carefully selected to ensure proper distribution of the chewing load.

After the surgery, the doctor will provide a detailed care guide, but there are also basic rules that help ensure a smooth recovery:

• first few days — soft diet, avoiding hard foods;
• gentle hygiene: soft toothbrush, prescribed antiseptics, and an oral irrigator only later when permitted by the dentist;
• avoid overheating (sauna, steam bath) and do not overload the body with intense sports during the early recovery period;
• attend follow-up appointments on schedule — this allows the doctor to spot any issues early and adjust treatment accordingly.

Most restrictions are short-term; the doctor will advise on exact timelines during follow-up visits.

Protocols Utilizing Transsinus Implants

Typically, this method is used as part of comprehensive tooth restoration protocols in the upper jaw. Most often, transsinus implants are utilized in the following protocols:

• All-on-4 / All-on-6. This is the restoration of a full dentition on 4 or 6 implants with a non-removable prosthesis. Transsinus implants can be used as posterior supports when bone is scarce and the sinus prevents vertical placement.
• Combined schemes for severe atrophy. The doctor can combine different types of supports to achieve stability and proper load distribution: tilted, pterygoid, and sometimes zygomatic.
• V-II-V and similar concepts. These are implant placement options where angle, length, and fixation in dense anatomical zones are crucial. Here, transsinus can act as a "bridge" between standard approaches and more invasive solutions.

Each method has its own characteristics.

Protocol	Most Suitable For	Role of Transsinus
All-on-4	Full arch, moderate/severe atrophy	Posterior tilted supports without bone grafting
All-on-6	Full arch, extra stability required	Additional supports for more even load distribution
Combined schemes	Highly complex case, maximum bone deficit	Ability to bypass the sinus and enhance fixation

Whichever protocol is chosen, precise diagnostics, original system components, and team experience are key. Only then do transsinus implants perform predictably, and the prosthesis serves for a long time.

Advantages and Limitations of the Method

Patients value transsinus implantation because it helps in cases where conventional methods fail. However, the technology also has limitations.

Pros:

• allows for implant placement despite a bone deficit in the upper jaw;
• often helps avoid or minimize bone grafting;
• offers a chance for a non-removable prosthesis in complex anatomy;
• can shorten the journey to temporary teeth and restore chewing faster;
• distributes the load more efficiently due to long tilted supports.

Cons and limitations:

• the technique is complex and requires highly qualified surgeons and orthopedists;
• suitable only for the upper jaw and requires healthy sinuses;
• requires thorough diagnostics (CT, planning), meaning it cannot be done blindly;
• the cost is typically higher than standard implantation due to the complex stages and components involved;
• patient discipline is crucial after surgery: hygiene, diet, and follow-up visits.

If the doctor suggests an alternative (such as a sinus lift or zygomatic implants), it should be considered as selecting the best solution for your bone, tissue, bite, and medical constraints.

Why Patients Choose SHEDO in Minsk for Complex Implantation

When it comes to the transsinus method, the team's experience and working standards are of paramount value. At SHEDO, implantation in complex cases is a dedicated specialty: our doctors regularly work with bone deficits, immediate loading, and full-arch restorations.

Why choose SHEDO:

• specialization in complex cases and comprehensive tooth restoration;
• highly professional doctors: you can learn more about the qualifications and experience of our specialists in the doctors section;
• adherence to strict standards: diagnostics, planning, the surgical phase, prosthetics, and quality control of the result;
• assistance with treatment organization and coordination for patients arriving from other cities and countries.

During the initial consultation, patients are briefed on treatment options, timelines, stages, and what determines the cost — making it easier to make an informed decision and compare alternatives.

Want to find out if transsinus implantation is right for you and what alternatives exist? Schedule a consultation at SHEDO in Minsk: the doctor will evaluate the condition of your bone and sinus using a CT scan, provide a clear treatment plan, and outline the estimated timeframe and cost. The sooner you begin restoration, the easier it is to preserve tissue and achieve a stable outcome.