Crestal approach for the repair of the Schneiderian membrane perforated during transalveolar sinus elevation

Aim The most common complication during maxillary sinus floor elevation is perforation of the Schneiderian membrane. Most of studies presented repair procedures via a lateral approach, which can induce additional complications. Therefore, in the present study the procedure was performed via crestal approach.

Case report This study included three patients who showed a low residual alveolar bone height in the maxillary posterior edentulous region and in whom the placement of implants with sinus floor elevation was planned via a transalveolar approach. Perforation of the sinus membrane occurred during the procedure, and so collagen dressing material was inserted through the drilling hole to cover the perforated membrane. Xenogeneic bone was grafted under the elevated sinus membrane, and implants were placed simultaneously. The final prostheses were delivered at 6 to 8 months after the surgery. There were no complications in any of the patients.

Results All implants showed successful stability, and no specific clinical or radiographic complication was observed during follow-ups lasting 2 to 3 years.

Conclusion A crestal approach can be a reliable option when repairing a sinus membrane that is perforated during transalveolar sinus floor elevation.