Published online Apr 6, 2021. doi: 10.12998/wjcc.v9.i10.2386
Peer-review started: December 5, 2020
First decision: January 7, 2021
Revised: January 21, 2021
Accepted: February 1, 2021
Article in press: February 1, 2021
Published online: April 6, 2021
Transcrestal sinus floor elevation (TSFE) has been widely used in the oral clinic when the residual bone height (RBH) exceeds 5 mm. However, when there is insufficient RBH in the posterior maxilla, two-stage TSFE may be an option.
This article introduces the concept of two-stage TSFE. Six patients had osseointegration failure after TSFE. For the first-stage surgery, we restricted the vertical bone augmentation as much as possible. At the second-stage surgery, the increased RBH was 3.28 ± 1.55 mm, which was beneficial for surgery. Five implants functioned successfully on schedule, but one implant failed again during the healing period. A third surgery was performed, and the implant functioned successfully.
When RBH was less than 5 mm, two or more procedures of TSFE might result in a higher RBH.
Core Tip: When the residual bone height is less than 5 mm, two-stage transcrestal sinus floor elevation is a safe technology, which might be an excellent option to embed standard-length implants. Two-stage transcrestal sinus floor elevation could obtain more maxillary sinus membrane elevation height, especially in difficult and complicated cases.