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Volume 28 , Issue 2
March/April 2013

Pages 556–562


A Novel Open-Tray Impression Technique for Fabrication of a Provisional Prosthesis on Immediate Load Implants in a Completely Edentulous Arch

Takahiro Kaneko, DDS, PhD/Kiyoshi Yamagishi, CDT/Norio Horie, DDS, PhD/Tetsuo Shimoyama, DDS, PhD


PMID: 23527360
DOI: 10.11607/jomi.2415

Purpose: To evaluate the clinical outcome of a novel open-tray impression technique for fabrication of a provisional prosthesis supported by immediately loaded implants in a completely edentulous arch. Materials and Methods: An open-tray impression technique was evaluated in this retrospective study that included patients treated between March 2006 and October 2009. Preoperatively, a diagnostic prosthesis was delivered, and a novel open tray was fabricated based on this prosthesis. After implant placement, the impression and interocclusal record were taken simultaneously using the novel open tray. Laboratoryfabricated, screw-retained, all–acrylic resin provisional restorations were delivered on the same day of surgery. The prosthesis was assessed from the day of surgery until replacement with a definitive prosthesis. Results: The study included 21 patients (mean age, 64.5 years) and a total of 125 implants. Of these, 104 implants were immediately loaded. In all patients, well-fitting provisional restorations supported by a minimum of four implants were delivered. Fracture of the first molar cusp was observed in one case after 30 days. However, there was no extensive fracture in the framework or functional disorder of the prosthesis. No implant failed during the follow-up after implant surgery. Conclusion: This protocol enabled fabrication of a well-fitting acrylic resin provisional prosthesis supported by immediately loaded implants because the impression was taken while in centric occlusion and an occlusion identical to the diagnostic prosthesis could be reconstructed. Int J Oral Maxillofac Implants 2013;28;556–562. doi: 10.11607/jomi.2415


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