A sinus membrane, also known as the Schneiderian membrane, is a thin layer of tissue that lines the inside of the maxillary sinus. The maxillary sinus is a hollow, air-filled space located in the upper jaw, just above the molar and premolar teeth. The sinus membrane plays a crucial role in separating the sinus cavity from the oral cavity.
The sinus membrane has a delicate structure and is composed of a layer of epithelial cells and connective tissue. It serves to protect the sinus cavity, regulate air pressure, and produce mucus that helps moisten and clean the nasal passages. The sinus membrane also contributes to the overall health of the sinuses and the upper respiratory system.
In dental procedures such as a sinus lift or sinus augmentation, the sinus membrane is gently lifted or elevated to create space for a bone graft material. This procedure is performed when there is insufficient bone height in the upper jaw for dental implant placement, and the goal is to provide additional bone support for the implants. The elevation of the sinus membrane allows for the placement of the bone graft material between the membrane and the existing jawbone. Over time, the graft material integrates with the patient's natural bone, promoting new bone growth and stability.
Due to the delicate nature of the sinus membrane, procedures involving its manipulation require careful surgical techniques to prevent damage or perforation. Dentists and oral surgeons who perform procedures that involve the sinus membrane are trained to handle the tissue with precision and expertise to ensure successful outcomes and minimize the risk of complications.