Evolving Techniques and Trends in Maxillary Sinus Lift Procedures in Implant Dentistry: A Review of Contemporary Advances

The most challenging aspects of planning implant rehabilitation for the posterior maxillary region are the pneumatization of the maxillary sinus and the resorption of the residual alveolar ridge. To address the first aspect, there are two primary modalities for sinus augmentation: the direct or lateral window technique and the indirect or crestal technique. Clinicians must possess comprehensive knowledge of the maxillary sinus anatomy and be able to diagnose pathognomonic abnormalities through presurgical imaging and investigations. This skill is essential for performing technique-sensitive augmentation of the maxillary sinus with or without using biomaterials such as bone grafts, membranes, and platelet concentrates. These materials help create a suitable bone bed for either simultaneous or delayed implant placement through various traditional and evolving modified sinus augmentation techniques. It is also critical to effectively elevate the Schneiderian membrane during sinus floor elevation surgery, as complications in this process can adversely affect implant survival and potentially lead to implant failure. This review explores various aspects of maxillary sinus augmentation, ranging from traditional methods to evolving contemporary techniques, and draws on existing literature to examine their advantages, limitations, indications, and contraindications.