After extraction of posterior mandibular teeth the posterior dentoalveolar maxillary extrusion is common finding in edentulous patients, in this conditions if the posterior maxillary teeth were lost the initial decrease in bone width is due to the resorption of the buccal bone plate. As the edentulous area continues to atrophy, there is a continuing loss of bone height and density and an increase in antral pneumatization. According to the type of ridge deficiency, various techniques can be used for correction of this condition. A particulate and block autogenous bone has been used for correction of alveolar ridge deficiency. This article presents an innovative technique that can be used to correct moderate to severe localized defects of the alveolar process prior to implant placement in posterior maxillary ridge.
According to our modified classification for posterior maxillary ridge deficiency The combination of extended tuberosity block bone graft harvesting with modified alveoloplasty (alveolectomy) and quadrilateral open sinus lift (localized inlay tuberosity block bone graft technique) is described as an alternative to simple alveoloplasty for management of the deficient interarch space and antral pneumatization for prosthetics rehabilitation at the posterior edentulous maxillary segments. Surgical intrusion of the osteotomised block bone segment as a corticocancelouse block bone graft to sinus cavity resulted in an adequate interarch space and simultaneous vertical ridge augmentation in posterior maxillary ridge deficiency for surgical and prosthetic outcomes without need for harvesting bone from another site.
Conflict of interest: None declared.