Altarawneh Sandra, Limmer Bryan, Reside Glenn J, Cooper Lyndon
Department of Prosthodontics, Faculty of Dentistry, University of Jordan, Amman, Jordan; Faculty of Dentistry, University of North Carolina, Chapel Hill, NC, USA.
J Esthet Restor Dent. 2015 Mar-Apr;27(2):63-70. doi: 10.1111/jerd.12137. Epub 2015 Jan 30.
This case report describes restoration of the edentulous maxilla and mandible with implant supported fixed prostheses using monolithic zirconia, where the incisal edges and occluding surfaces were made of monolithic zirconia. Edentulism is a debilitating condition that can be treated with either a removable or fixed dental prosthesis. The most common type of implant-supported fixed prosthesis is the metal acrylic (hybrid), with ceramo-metal prostheses being used less commonly in complete edentulism. However, both of these prostheses designs are associated with reported complications of screw loosening or fracture and chipping of acrylic resin and porcelain. Monolithic zirconia implant-supported fixed prostheses have the potential for reduction of such complications. In this case, the CAD/CAM concept was utilized in fabrication of maxillary and mandibular screw-retained implant-supported fixed prostheses using monolithic zirconia. Proper treatment planning and execution coupled with utilizing advanced technologies contributes to highly esthetic results. However, long-term studies are required to guarantee a satisfactory long-term outcome of this modality of treatment.
This case report describes the clinical and technical procedures involved in fabrication of maxillary and mandibular implant-supported fixed prostheses using monolithic zirconia as a treatment of edentulism, and proposes the possible advantages associated with using monolithic zirconia in eliminating dissimilar interfaces in such prostheses that are accountable for the most commonly occurring technical complication for these prostheses being chipping and fracture of the veneering material.
本病例报告描述了使用整体式氧化锆通过种植体支持的固定修复体修复无牙上颌骨和下颌骨的情况，其中切缘和咬合面由整体式氧化锆制成。无牙症是一种使人衰弱的病症，可通过可摘或固定义齿进行治疗。最常见的种植体支持的固定修复体类型是金属丙烯酸（混合）修复体，在完全无牙症中较少使用陶瓷金属修复体。然而，这两种修复体设计都存在报道的并发症，如螺钉松动或断裂以及丙烯酸树脂和瓷片的碎裂。整体式氧化锆种植体支持的固定修复体有可能减少此类并发症。在本病例中，采用CAD/CAM概念制作了上颌和下颌螺钉固位的种植体支持的整体式氧化锆固定修复体。合理的治疗计划和实施以及利用先进技术有助于获得高度美观的效果。然而，需要进行长期研究以确保这种治疗方式能取得令人满意的长期效果。
本病例报告描述了使用整体式氧化锆制作上颌和下颌种植体支持的固定修复体以治疗无牙症所涉及的临床和技术程序，并提出了使用整体式氧化锆在消除此类修复体中不同界面方面的可能优势，这些界面是导致此类修复体最常见技术并发症（即饰面材料的碎裂和断裂）的原因。
