News & Events

Bluestone Investigators Develop New Single-Implant Surgical Approach to Sinus Augmentation

December 4, 2012

Researchers from the NYU Bluestone Center for Clinical Research and the NYU College of Dentistry’s Department of Periodontology and Implant Dentistry recently published a manuscript on a new sinus augmentation procedure, an improvement on the previously used Lateral Window Sinus Floor Elevation (LWSFE) and Bone Added Osteotome Sinus Floor Elevation (BAOSFE).

The manuscript, “Osteotome-Assisted Sinus Augmentation (OASA) Procedure for Single Implant Placement in an Atrophic Posterior Maxilla” was published in the latest issue of Dental Learning. Dr. Stuart J. Froum, DDS, Clinical Assistant Professor and Director of Clinical Research in the Department of Periodontology and Implant Dentistry, Dr. Sang-Choon Cho, DDS MS, Clinical Assistant Professor and Director of the Advanced Program for International Dentists in Implant Dentistry, Dr. Rodrigo Cayarga De la Hoz, DDS, Clinical Fellow at New York University College of Dentistry and Dr. Ismael Khouly, DSS, MS, Clinical Research Coordinator at the Bluestone Center for Clinical Research, all contributed to the article. Drs. Khouly, Froum and Cho have been refining the OASA procedure since 2009. 

While there are several techniques available for performing sinus augmentation surgery, the OASA procedure enables simultaneous placement of implants in the atrophic maxilla, minimizing the size of the incision and reflection of the periosteal flap and reducing the lateral window. This decreases the removal of bone from the lateral sinus wall and allows more cells from the intact sinus to contribute to healing. Thus, the potential for postoperative complications, such as swelling and pain, is greatly reduced. 

The LWSFE procedure can result in excessive bone removal for single implant placement. In addition to allowing the operator have more control of the bone grafting placement, the OASA procedure also allows for graft materials to be directly added through the drilling site, resulting in a dome-shaped elevation around the implant apex. This allows the graft material to surround the entire body of the implant and improves graft to bone contact. 

Prior to the OASA procedure, patients received a complete examination of oral hard and soft tissues and a dental treatment plan was established in conjunction with a restorative dentist. A total of fifteen single implants were performed and patients were recalled every three months for supportive care and evaluation. Results of the 24 month study demonstrate there was an implant success rate of 100% with a low incidence of perforation (6.7%). There was also an average increase in bone height of 7.18 mm with the OASA procedure. These results demonstrate the OASA technique has many advantages when used for single implants, or when multiple implants are placed but one implant has native bone <7mm that limits placement.

Full article can be found online at: