Dental implantation is becoming an increasingly accessible and popular service. Thanks to her, even the complete absence of teeth is no longer a hindrance to “shine” a few months after a visit to the doctor. even and white smile.
But in in a number of cases, simple implantation is not enough: structural features of the area in in which implants are implanted require preliminary preparation.
Sinus lift is one of preparatory procedures.
- Sinus lift: why this procedure is needed
- Sinus Lift: When Needed
- Sinus lift: how the operation is performed
Sinus lift: why this procedure is needed
In order to understand the principle of sinus lift, you should get an idea of what this term means. Sinus — this is the sinus, in this case, the maxillary (or maxillary). Lifting (from lift) — uplift. And & nbsp; actually sinus lifting means raising the bottom of the maxillary sinus.
It is this paranasal sinus that is closest to the teeth of the upper jaw, which are located between the incisors and molars. Sometimes it is located so close to them that the roots of the teeth "sprout" into her cavity. And in in the in the case of a prolonged lack of teeth in the area, the thickness of the jawbone naturally decreases, and there leaves there replacement in of the implant.
It is in this case that a sinus lift will come in handy. By elevating the bottom of the maxillary sinus (in fact, by reducing the volume of its cavity), the doctor increases the free space in the implantation area. It is necessary for the implantation of synthetic or patient's own bone tissue into it and "building" missing volume.
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Sinus Lift: When Needed
In order for an implant (an artificial root, on which a crown will then be installed) to take root well and perform its functions for many years, it must be immersed in the bone to a certain depth. This is the only way to achieve a stable position of the “root”, which will ensure trouble-free chewing of food with the participation of an artificial crown. Therefore, a sinus lift is necessary in all cases where the thickness and height of the own maxillary bone is not sufficient for the implant to take the correct position.
This tissue defect may be due to:
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Anatomical features of the structure of the facial skull. This is a very common situation when the maxillary sinus is separated only by a thin wall from the alveolar processes (a kind of "nests" in which the teeth are located).
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Tooth loss for more than six months. If a long time passes after tooth extraction, the bone tissue in the place of the missing tooth begins to naturally dissolve, which leads to a decrease in its density and thickness.
Sinus lift: how the operation is performed
Depending on the features of the clinical case, the sinus lift can be performed using open or closed surgery.
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Open sinus lift. During the operation, the doctor gains access to the maxillary sinus and carefully separates its mucous membrane, lifting it up. After that, a protective membrane is installed between the mucosa and the vacated space, and the free space is filled with a material designed to perform the function of bone tissue. The disadvantage of this method is its relatively high trauma and a longer healing period.
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Closed sinus lift. A distinctive feature of this technique is the introduction of bone material without open access to the sinus. Bone tissue is injected through a tunnel, which will later become a bed for the implant. The disadvantage of this method is that it is impossible to significantly increase the volume of the bone tissue, therefore, the closed sinus lift is used only in cases where a slight increase in the thickness of the jaw bone is required.
Which of these methods is needed in a particular case — the doctor decides.
The operation is performed under local or intravenous anesthesia and lasts from 20 to 60 minutes, depending on the complexity of the situation. After the completion of the sinus lift, the patient is given recommendations on the recovery period and the date of the control visit to the doctor.
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