J Korean Assoc Oral Maxillofac Surg 2017; 43(4): 276~281
Lateral approach for maxillary sinus membrane elevation without bone materials in maxillary mucous retention cyst with immediate or delayed implant rehabilitation: case reports
Ji-Deuk Han1, Seong-Ho Cho1, Kuk-Won Jang1, Seong-Gwang Kim2, Jung-Han Kim1, Bok-Joo Kim1, Chul-Hun Kim1
1Department of Oral and Maxillofacial Surgery, College of Medicine, Dong-A University, 2CS Dental Hospital, Busan, Korea
Chul-Hun Kim
Department of Oral and Maxillofacial Surgery, College of Medicine, Dong-A University, 32 Daesingongwon-ro, Seo-gu, Busan 49201, Korea
TEL: +82-51-240-5470 FAX: +82-51-241-5475 E-mail: bbp2000@hanmail.net ORCID: http://orcid.org/0000-0002-2492-174X
Received March 27, 2017; Revised July 12, 2017; Accepted July 31, 2017.; Published online August 31, 2017.
© Korean Association of Oral and Maxillofacial Surgeons. All rights reserved.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
This case series study demonstrates the possibility of successful implant rehabilitation without bone augmentation in the atrophic posterior maxilla with cystic lesion in the sinus. Sinus lift without bone graft using the lateral approach was performed. In one patient, the cyst was aspirated and simultaneous implantation under local anesthesia was performed, whereas the other cyst was removed under general anesthesia, and the sinus membrane was elevated in a second process, followed by implantation. In both cases, tapered 11.5-mm-long implants were utilized. With all of the implants, good stability and appropriate bone height were achieved. The mean bone level gain was 5.73 mm; adequate bone augmentation around the implants was shown, the sinus floor was moved apically, and the cyst was no longer radiologically detected. Completion of all of the treatments required an average of 12.5 months. The present study showed that sufficient bone formation and stable implantation in a maxilla of insufficient bone volume are possible through sinus lift without bone materials. The results serve to demonstrate, moreover, that surgical treatment of mucous retention cyst can facilitate rehabilitation. These techniques can reduce the risk of complications related to bone grafts, save money, and successfully treat antral cyst.
Keywords: Sinus floor augmentation, Without bone graft, Dental implants, Cysts

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