Abstract
The purpose of this study was to devise a classification and lateral window design method based on implants and to evaluate whether these classifications and methods are applicable to clinical practice. When applying the maxillary sinus elevation technique using the lateral window, possible situations were classified into four: (A) two or more sites for implants are required for maxillary sinus augmentation, (B) a single implant is required when there are no adjacent teeth, (C) a single implant is required when one adjacent tooth is present at the mesial or distal area, and (D) a single implant is required when both mesial and distal adjacent teeth are present. In order to verify whether this classification can be used in all situations, 76 patients who underwent maxillary sinus elevation with a lateral window were selected and investigated. Of them, 47 (62%) were included in Group A, 9 (12%) in Group B, 8 (11%) in Group C, and 12 (15%) in Group D. Lateral window designing in the lateral approach of sinus augmentation can be classified into four clinical situations. There were no unclassified cases. This classification and window positioning method can be applied to most cases.
Highlights
The maxillary posterior edentulous region is an area where implant placement is difficult due to its anatomical characteristics, and the survival rate of the implant is low due to the bone quality and quantity [1,2,3]
A window is opened on the side wall bone of the maxillary sinus, lifted from the sinus membrane, and grafted by crushing the bone collected from the long bone between the mucosa and the bone
The purpose of this study is to propose a method to determine lateral window position and verify its effectiveness in various clinical cases
Summary
The maxillary posterior edentulous region is an area where implant placement is difficult due to its anatomical characteristics, and the survival rate of the implant is low due to the bone quality and quantity [1,2,3]. One reason for the low survival is that it is adjacent to the surgical site, making it difficult to secure the residual bone mass. A second reason is that the cortical bone is thinner than the mandibular bone and the density of the spongy bone is low, which makes the bone quality unfavorable for implant [4,5,6,7]. The alternative way is to perform a maxillary sinus bone graft using maxillary sinus augmentation. The Caldwell-Luc approach is another way to perform maxillary sinus bone graft using maxillary sinus augmentation, as described in 1980 by Boyne and James [9]. A number of papers on maxillary sinus surgery have been
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