Purpose

This paper aims to present a new design for removable partial dentures (RPDs) for partially edentulous patients to improve the efficiency and quality of RPD manufacturing. Additive and subtractive manufacturing technologies and zirconium silicate micro-ceramic bonding in the aesthetic zone are used herein.

Design/methodology/approach

A case was presented. First, RPD digital definitive casts were acquired, and then digital frameworks with crown retainers and digital crowns were obtained by computer-aided design (CAD). The titanium alloy frameworks and resin crowns were fabricated by three-dimensional (3D) printing and computer-aided manufacturing (CAM) processes, respectively. The crowns adhered to the crown retainers. Ceramage bonding was used to reform the gingival anatomy in the aesthetic zone during the fabrication of the RPDs. The finished RPDs were assessed by a clinician and delivered to the patient.

Findings

The RPDs were conventionally assessed by a clinician, were deemed to be accurate and satisfied both the patient and clinician.

Originality/value

This novel method provides a way to fabricate RPDs with a combination of additive and subtractive manufacturing technologies. The design of the framework was different from that of a conventional framework because it contained the crown retainers, and the traditional base retainer no longer existed. Ceramage bonding was used to replicate the gingival anatomy in the aesthetic zone. The new RPDs provided accuracy and were less time-consuming to produce than those produced with the traditional method. The new method enables the digital manufacturing of nearly the entire RPDs.

中文翻译：

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结合加减法制造技术对钛合金和硅酸锆微陶瓷制成的可摘局部义齿进行数字化制作

目的

本文旨在提出一种针对部分缺牙患者的可移动局部义齿（RPD）的新设计，以提高RPD制造的效率和质量。在本文中使用增材制造和减材制造技术以及在美学区域中的硅酸锆微陶瓷结合。

设计/方法/方法

提出了一个案例。首先，获得了RPD数字式最终铸件，然后通过计算机辅助设计（CAD）获得了带有牙冠固定器和数字牙冠的数字框架。钛合金框架和树脂牙冠分别通过三维（3D）打印和计算机辅助制造（CAM）工艺制造。牙冠粘附在牙冠固定器上。在制造RPD的过程中，采用陶瓷粘接来重塑美学区的牙龈解剖结构。由临床医生评估完成的RPD，并将其交付给患者。

发现

RPD是由临床医生常规评估的，被认为是准确的，并且使患者和临床医生都满意。

创意/价值

这种新颖的方法提供了一种将增材制造和减材制造技术相结合来制造RPD的方法。框架的设计与传统框架的设计不同，因为它包含胎冠固定器，而传统的基础固定器不再存在。陶瓷粘接用于在美学区域复制牙龈解剖结构。与使用传统方法生产的RPD相比，新的RPD提供了准确性，并且生产时间更少。新方法使几乎整个RPD的数字化制造成为可能。