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Open AccessArticle

Graft Remodeling following Transcrestal Sinus Floor Elevation via the Gel-Pressure Technique (GPT) and Pasteous Nano-Crystalline Hydroxyapatite Bone Substitute

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Academy for Oral Implantology, Lazarettgasse 19/DG, Vienna 1090, Austria
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Center for Medical Physics and Biomedical Engineering, Medical University of Vienna, Währinger Gürtel 18-20, AKH-4L, Vienna 1090, Austria
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Author to whom correspondence should be addressed.
Academic Editor: Franz E. Weber
Materials 2015, 8(6), 3210-3220; https://doi.org/10.3390/ma8063210
Received: 5 May 2015 / Revised: 24 May 2015 / Accepted: 28 May 2015 / Published: 3 June 2015
(This article belongs to the Special Issue Novel Bone Substitute Materials)
Bone grafting of the maxillary sinus is attempted to compensate for sinus pneumatization and permit reliable insertion of endosseous dental implants for prosthetic rehabilitation. The aim of the present clinical investigation was to study bone regeneration four months after transcrestal sinus floor elevation via the Gel-Pressure Technique (GPT) and application of pasteous nano-crystalline hydroxyapatite bone substitute. A total of 25 patients with deficient alveolar ridges in the posterior maxilla (mean residual bone height: 4.7 ± 1.8 mm) were subjected to 32 flapless transcrestal sinus floor augmentations and simultaneous insertion of 40 implants. Sinus membrane elevation height averaged 11.2 ± 2.7 mm and minimal vertical graft resorption of 0.1 mm was observed after four months. Radiographic bone density averaged 460 Hounsfield units in regions adjacent to the native jawbone (1 to 7 mm distance), while reduction of bone density by −7.2%, −11.3%, −14.8%, −19.6% and −22.7% was recorded in more apical regions of 8, 9, 10, 11, and ≥12 mm distance to the original sinus floor, respectively. The results suggest that graft remodeling is completed up to a distance of 7 mm within a healing period of four months after sinus augmentation using nano-crystalline hydroxyapatite bone substitute material. View Full-Text
Keywords: dental implants; bone substitutes; sinus floor augmentation; maxillary sinus; bone transplantation; implant-supported dental prosthesis dental implants; bone substitutes; sinus floor augmentation; maxillary sinus; bone transplantation; implant-supported dental prosthesis
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Pommer, B.; Unger, E.; Busenlechner, D.; Haas, R.; Mailath-Pokorny, G.; Fürhauser, R.; Watzek, G. Graft Remodeling following Transcrestal Sinus Floor Elevation via the Gel-Pressure Technique (GPT) and Pasteous Nano-Crystalline Hydroxyapatite Bone Substitute. Materials 2015, 8, 3210-3220.

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