Remodeling of Autogenous Bone Grafts after Osteotome Sinus Floor Elevation Assessed by Limited Cone Beam Computed Tomography

Abstract

This study assessed the radiographic appearance of bone graft domes longitudinally after osteotome sinus floor elevation using cone beam computed tomography (CBCT). This study presents the radiological findings of a 6-month follow-up CBCT study in maxillary osteotome sinus floor elevation. We examined 52 patients with a crestal bone height of less than 8 mm in the posterior maxilla who required sinus augmentation. Implants (n = 91) were subsequently placed in regenerated bone following osteotome sinus floor elevation; autogenous bone was used as the augmentation material. In all cases, the grafted augmentation material tended to be absorbed, but at least 1 mm of grafted augmentation material was recognized around the implant fixtures on CBCT at the second implant operation. The border between the grafted augmentation material and the existing bone was indistinct. The grafted area apical to the implants undergoes shrinkage and remodeling. It was suggested that sufficient grafted autogenous bone changes into bone to support an implant.

Two‐Center Prospective, Randomized, Clinical, and Radiographic Study Comparing Osteotome Sinus Floor Elevation with or without Bone Graft and Simultaneous Implant Placement

“…Autogenous bone graft promotes osteogenesis but suffers from uncontrolled resorption, limited availability, and morbidity of the donor site . Nishida and colleagues reported significant reduction of apical height and width of autogenous bone 6 months after implant placement following OSFE, although at least 1 mm of grafting material surrounded dental implants. In the study of Jung and colleagues, simultaneous placement of SLA implants using OSFE approach together with β‐TCP and demineralized freeze‐dried bone resulted in marked reduction in graft height during the first 2 years.…”

Transcrestal Sinus Lift Using Platelet Concentrates in Association to Short Implant Placement: A Retrospective Study of Augmented Bone Height Remodeling

“…While in the case of the graft from the iliac crest was decreased by 0 to 0.2 mm in the same period. Nishida and colleagues used autologous bone graft from intraoral origin and the CBCT analysis indicated a loss in the apical augmented height by 3.3 mm in 6 months' time …”

An Evaluation of Three-Dimensional Scans of the Time-Dependent Volume Changes in Bone Grafting Materials

“…[13], Berberi A. [10], Nishida T. [8], Dellavia [18]followed up thevolumetric changes occurring after a sinus floor augmentation procedure over a 6-month period.…”

“…Nishida T. et al [8] presented radiological findings of a CBCT study oftrans-crestal sinus floor elevation, using autogenous bone as the augmentation material. 91 implants on 52 patients were subsequently placed in the regenerated bone.…”