Department of Removable Partial Prosthodontics, Tokyo Dental College, Tokyo, Japan.
Oral Health Science Center, Tokyo Dental College, Tokyo, Japan.
J Prosthodont Res. 2023 Jul 31;67(3):487-492. doi: 10.2186/jpr.JPR_D_22_00064. Epub 2022 Aug 27.
This clinical report describes the process for fabricating a double-crown-retained removable dental prosthesis combining a fiber-reinforced composite and zirconia using digital technology. An 83-year-old woman presented with gingival swelling around the maxillary right premolar. The swollen tooth was the abutment tooth of a cross-arch fixed partial denture. An intraoral scanner (IOS) and computer-aided design/manufacturing as digital technology were used to plan treatment with a double-crown-retained removable dental prosthesis. A metal-free prosthesis using zirconia for the primary crown and fiberglass-reinforced composite resin for the secondary crown was planned, and the patient consented to the treatment plan. After autotransplantation of a tooth as one of the abutments, the IOS was used to obtain digital scans of the prepared surface of the abutment teeth, opposing dentition, and occlusal relationships. First, primary crowns were milled using zirconia. Next, the intraoral scanner obtained a pick-up impression of the primary crowns, and secondary crowns were designed and milled from the fiber-reinforced composite. After delivery, the patient expressed satisfaction with the functionality, esthetics, and fit of the double-crown-retained removable dental prosthesis.
Digital technology offers many advantages such as efficient fabrication of double crowns, reduced material costs, improved biocompatibility, and good aesthetics of metal-free materials.
This clinical report describes the application of digital technology for the fabrication of a double-crown-retained removable dental prosthesis combining a fiber-reinforced composite and zirconia, resulting in patient satisfaction.
本临床报告描述了使用数字技术制作纤维增强复合材料和氧化锆双冠可摘局部义齿的过程。一位 83 岁女性因上颌右侧前磨牙牙龈肿胀就诊。肿胀的牙齿是横跨弓固定局部义齿的基牙。使用口内扫描仪（IOS）和计算机辅助设计/制造等数字技术来计划制作双冠可摘局部义齿的治疗方案。计划制作一个无金属的义齿，其主要冠部使用氧化锆，次要冠部使用玻璃纤维增强复合树脂，患者同意了该治疗计划。在将一颗牙自体移植作为其中一个基牙后，使用 IOS 获得基牙、对颌牙和咬合关系的预备表面的数字扫描。首先，使用氧化锆铣制主要冠部。然后，IOS 获取主要冠部的印模，再从纤维增强复合材料设计和铣制次要冠部。交付后，患者对双冠可摘局部义齿的功能、美观和适配性表示满意。
数字技术具有许多优势，例如双冠的高效制作、降低材料成本、提高生物相容性以及无金属材料的良好美学效果。
本临床报告描述了数字技术在制作纤维增强复合材料和氧化锆双冠可摘局部义齿中的应用，获得了患者的满意。
