Progress on the study of the transcrestal sinus augmentation technique

Transcrestal sinus floor augmentation applied for severely atrophic maxilla sinus floor augmentation is frequently performed because of posterior maxilla resorption and low bone density. The traditional perspective is that the residual bone height is a main factor influencing the selection of the augmentation technique and the transcrestal technique can only be used when the residual bone height is more than 4-5 mm. However, many researchers have used this technique with lower bone heights because of the development of better surgical instruments and clinical skills. Based on the review of the literature in recent years and the author′s understanding of clinical operation, this paper reviews the improvement progress and operation skills of the application of transalveolar ridge top maxillary sinus lift in the severely absorbed maxillary posterior tooth area.