Prosthodontist in private practice, Athens, Greece.
Department of Periodontics, National and Kapodistrian University of Athens, Dental School, Athens, Greece.
J Prosthodont. 2021 Aug;30(7):555-560. doi: 10.1111/jopr.13359. Epub 2021 Apr 20.
The purpose of this clinical case report is to describe a fully digital workflow for the duplication of an existing implant retained overdenture, highlighting the benefits of digitally fabricated dentures. The patient presented with an existing mandibular implant retained overdenture on Locator attachments that needed to be replaced. The existing overdenture was duplicated/scanned with the use of an intraoral scanner and was 3D printed using acrylic resin. This resin duplicate was sectioned in the midline and served as a unilateral record base to digitally record maxillo-mandibular relationship. The occlusal relationship was scanned unilaterally with the record base (sectioned duplicate) in place, and the procedure was repeated for the opposite side. All scans (edentulous, bite registrations and preliminary scan) were superimposed and the software managed to position and stich everything together. A try-in copy denture (ProArtCAD Try in, Ivoclar Vivadent AG, Schaan, Liechtenstein) was milled in order to imitate the conventional wax teeth try-in. A definitive milled overdenture was fabricated and delivered. A reinforcing polyetheretherketone mesh was fabricated, utilizing computer assisted design/computer assisted manufacturing technology and was incorporated into the pre-designed customized space into the polymethylmethacrylate base, using indirect light-polymerized nano-filled composite resin (crea.lign; bredent GmbH & Co. KG). Occlusion was verified and the patient was instructed oral hygiene, home maintenance and was informed for the required recall visits.
本临床病例报告的目的是描述一种用于复制现有种植体支持覆盖义齿的全数字化工作流程，强调数字化制作义齿的优势。患者存在Locator 附着体支持的下颌种植体支持覆盖义齿，需要更换。使用口内扫描仪复制/扫描现有覆盖义齿，并使用丙烯酸树脂进行 3D 打印。将该树脂复制体沿中线切割，作为单侧记录基台，以数字化记录上下颌关系。在记录基台（切割复制体）就位的情况下，单侧扫描咬合关系，对另一侧重复该过程。所有扫描（无牙颌、咬合记录和初步扫描）进行叠加，软件成功定位并将所有内容缝合在一起。制作了一个试戴复制义齿（ProArtCAD Try in，Ivoclar Vivadent AG，Schaan，Liechtenstein），以模拟常规蜡牙试戴。制作了一个确定的铣削覆盖义齿并交付。使用计算机辅助设计/计算机辅助制造技术制作了一个增强型聚醚醚酮网，并将其纳入预先设计的定制空间到聚甲基丙烯酸甲酯基托中，使用间接光聚合纳米填充复合树脂（crea.lign；bredent GmbH & Co. KG）。验证了咬合，并指导患者进行口腔卫生、家庭维护，并告知患者需要定期回访。
