Stage Characterization and Marginal Bone Loss Evaluation Up to 96 Months of Crestal Sinus Augmentation With Sequential Drills: A Retrospective Study.

摘要: INTRODUCTION The 2-stage crestal approach to augment the maxillary sinus is a little-used technique. aim of this retrospective study was assess events characterizing stages technique after implant placement in posterior maxilla with residual bone height less than 4 mm and evaluate marginal loss (MBL) changes over time. MATERIAL AND METHODS Thirty-three patients underwent unilateral augmentations using trancrestal mineralized allograft. Six-months (6 m) first surgery, if skeletal subsidence prevented insertion 10-mm-length implant, additional grafting performed during (n = 33) insertion. Radiographs were taken before (baseline), immediately at 6 months; months placement; follow-up (24-96 m). RESULTS One lost (ISR 96.97%). Of remaining 32 patients, 14 (A group) standard placement, whereas 18 (B placement. Given that B-group initially obtained lower procedures provided greater B group. A significant relationship between ending (eMBL) 6mMBL found both groups, values However, eMBL always 0.44 mm. DISCUSSION Results suggest high low skeletal-reactivity patient categorization. In categories, MBL greatly depends upon 6-month values. Investigations are necessary relate size results by approach. CONCLUSIONS lift procedure not only provides predictable results, but also allows recovery.