Benefit of the replaceable bony window in lateral maxillary sinus augmentation: clinical and histologic study.
OBJECTIVE
This retrospective study demonstrates, by clinical and histologic evaluation, the benefit of the replaceable bony window as a homologous bony barrier in lateral sinus augmentation.


METHODS
A total of 103 maxillary sinus augmentations were performed using a piezoelectric device and a Er,Cr:YSGG laser apparatus. The detached bony windows were repositioned over various bone grafts. Sixteen bone biopsy specimens were harvested at the time of uncovering or implant placement.


RESULTS
Three sinuses developed postoperative infections (2.91%). After 6 to 8 months of healing, uncovering procedures were carried out. Radiographically, reconstruction of the lateral sinus wall was observed in all cone-beam computed tomogram. Clinically, complete bone healing between the replaceable bony window and the lateral sinus wall was observed in all cases, except for the 3 infected sinuses (100 sinuses, 97.09%). Histologically, favorable new bone formation was observed in all specimens without any fibrous connective tissue invagination. More mature bone was observed along the floor of the replaceable bony window than at the center of the graft site.


CONCLUSIONS
This study demonstrates that the replaceable bony window acts as an osteoinductive homologous barrier membrane over various bone graft materials and accelerates new bone formation in lateral sinus augmentation.
*Clinical Instructor, Department of Dentistry and Oral and Maxillofacial Surgery, Catholic University Hospital of Daegu, Daegu, Republic of Korea. †Chairman and Professor, Department of Dentistry and Oral and Maxillofacial Surgery, Catholic University Hospital of Daegu, Daegu, Republic of Korea. ‡Private Practice, Goodwill Dental Hospital, Busan, Republic of Korea. §Assistant Professor, Department of Dentistry and Oral and Maxillofacial Surgery, Catholic University Hospital of Daegu, Daegu, Republic of Korea.
Ji-Min
JM
Kim
Dong-Seok
DS
Sohn
Jeong-Uk
JU
Heo
Jee-Won
JW
Moon
Ju-Hyoung
JH
Lee
In-Sook
IS
Park
D001706:Biopsy; D005260:Female; D006801:Humans; D008297:Male; D008437:Maxilla / Q000473:pathology / Q000601:surgery; D008443:Maxillary Sinus / Q000473:pathology / Q000601:surgery*; D008875:Middle Aged; D013516:Oral Surgical Procedures, Preprosthetic / Q000009:adverse effects / Q000379:methods; D012189:Retrospective Studies; D059546:Sinus Floor Augmentation / Q000009:adverse effects / Q000379:methods