Five-year outcome of bone remodelling around implants in the maxillary sinus: assessment of differences between implants placed in autogenous inlay bone blocks and in ungrafted maxilla.
The placement of implants in the posterior maxillary area is considered a reliable procedure, offering recognized rehabilitative advantages. The aim of this study was to evaluate the performance of dental implants placed in the sinus floor augmented with a block autograft by comparing the outcomes over 5 years with those of dental implants positioned in non-augmented bone. This retrospective cohort study included 16 patients who had undergone prosthetic rehabilitation supported by dental implants between 2000 and 2006. One implant per patient was included and assigned to one of two predictor groups: grafted versus ungrafted maxillary sinus. Changes in marginal bone level (MBL) and apical bone level (ABL) over time, at 1, 3, and 5 years, were the primary outcome variables. Appropriate pair-wise comparison tests were performed. No significant differences were seen with regard to ABLs and among times between the grafted group (nine implants) and the ungrafted group (seven implants). Significant marginal bone resorption was found over time, primarily at the buccal aspect, in both study groups. The bone surrounding the apex of dental implants appeared stable after sinus augmentation in the grafted area. The behaviour of the two groups with regard to loss of MBLs over time was very similar.
Clinical Department of Head and Neck, School of Medicine, University of Naples "Federico II", Naples, Italy.
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Martuscelli
Private Practice and Department of Surgical, Medical, Molecular, and Critical Area Pathology, University of Pisa, Camaiore, Pisa, Italy.
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Toti
Department of Medicine and Surgery, School of Medicine, University of Salerno, Baronissi, Salerno, Italy. Electronic address: lsbordone@unisa.it.
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Sbordone
Complex Operating Unit of Maxillofacial Surgery, Azienda Ospedaliero - Universitaria Pisana, Pisa, Italy.
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Guidetti
Department of Neurosciences, Reproductive and Odontostomatological Sciences, School of Medicine, University of Naples "Federico II", Naples, Italy.
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Ramaglia
Maxillo-Facial Surgery, School of Medicine, University of Naples "Federico II", Naples, Italy.
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Sbordone
D000328:Adult; D016723:Bone Remodeling; D016025:Bone Transplantation; D003758:Dental Implantation, Endosseous; D015921:Dental Implants; D017268:Dental Prosthesis Retention; D019232:Dental Restoration Failure; D005260:Female; D006801:Humans; D008297:Male; D008443:Maxillary Sinus / Q000000981:diagnostic imaging / Q000473:pathology / Q000601:surgery*; D008875:Middle Aged; D012189:Retrospective Studies; D014057:Tomography, X-Ray Computed; D014182:Transplantation, Autologous; D016896:Treatment Outcome
D015921:Dental Implants
autologous bone graft; dental implants; sinus lift