Internal Sinus Membrane Elevation in Patients With Less Than 5 mm Residual Bone Height.

Sinus membrane elevation can be accomplished through use of either a direct or indirect technique. The indirect or internal elevation technique lifts the sinus membrane by elevating it superiorly using osteotomes, with or without the use of grafting material. The authors reference a revolutionary randomized clinical trial in which tissue-level implants with a coronally flared design were placed in residual bone height of ≤4 mm using an internal sinus membrane elevation technique and describe an adaptation of the procedure discussed in that study and its successful use in a prosthodontics residency program.