Department of Oral and Maxillofacial Surgery, Saitama Medical Center, Saitama Medical University, Saitama, Japan.
Int J Oral Maxillofac Implants. 2013 Mar-Apr;28(2):556-62. doi: 10.11607/jomi.2415.
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.
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. Laboratory-fabricated, 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.
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.
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.
评估一种新型的开放式托盘印模技术在完全无牙弓中即刻负载种植体支持的临时修复体的临床效果。
本回顾性研究评估了一种开放式托盘印模技术，该技术纳入了 2006 年 3 月至 2009 年 10 月期间治疗的患者。术前，交付了诊断性修复体，并基于该修复体制作了新型开放式托盘。种植体放置后，使用新型开放式托盘同时进行印模和𬌗记录。实验室制作的、螺丝固位的、全亚克力树脂临时修复体在手术当天交付。从手术当天开始评估修复体，直到用最终修复体替换为止。
本研究纳入了 21 名患者（平均年龄 64.5 岁）和总共 125 个种植体。其中，104 个种植体即刻负载。所有患者均交付了由至少四个种植体支撑的适配良好的临时修复体。在一个病例中，在第 30 天时观察到第一磨牙尖的骨折。然而，框架没有广泛的骨折或修复体的功能障碍。在种植手术后的随访中，没有种植体失败。
该方案能够制作出适配良好的丙烯酸树脂临时修复体，因为印模是在正中咬合时进行的，可以重建与诊断性修复体相同的咬合。
