In the edentulous posterior maxilla, progressive sinus pneumatization and residual alveolar bone resorption due to various causes may lead to bone volume deficiency. Therefore, alveolar bone augmentation surgery is often a prerequisite to dental implant placement. In complex or advanced cases where the residual alveolar bone height is compromised (<5 mm) and sinus elevation is expected, the traditional surgical approach is an external maxillary sinus lift procedure (lateral window approach) that involves the application of bone graft materials. This grafting procedure is performed to create an appropriate osteogenic space for eventual implant placement.1,2  However, the lateral window approach has several drawbacks, including (i) complicated procedures, (ii) relatively high costs, and (iii) postoperative complications such as pain, swelling, and hematoma. In contrast, the transcrestal approach, also known as an osteotome sinus floor elevation, brings many advantages. This approach is minimally invasive, easier to perform, and thus results...

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