Abstract
This technical procedure demonstrates a 4-step completely digital workflow for the fabrication of complete dentures in edentulous patients. The digital scan data of the edentulous arches were obtained using an intraoral scanner, followed by the fabrication of modeless trial denture bases using additive manufacturing. Using the trial denture base and a wax rim assembly, the interarch relationship was recorded. This record was digitized using an intraoral scanner and reversed for each maxillary and mandibular section individually. The digital scan data directly obtained using the intraoral scanner were superimposed over the reversed data, establishing a proper interarch relationship. The artificial teeth were arranged virtually and try-in dentures were additively manufactured. Subsequently, the gingival and tooth sections were additively manufactured individually and characterized. Thus, fabrication of digital complete dentures can be accomplished using digital data characteristics. The workflow includes data acquisition using an intraoral scanner, data processing using reverse engineering and computer-aided design software programs, and additive manufacturing.
Highlights
Complete dentures have been manufactured using a conventional workflow, which requires multiple visits of the patients to a dental clinic and complex laboratory procedures [1,2]
With recent advances in computer-aided design and computer-aided manufacturing (CAD-CAM) technology, the digital design and fabrication of complete dentures have become an active area of research
This paper presents a digital workflow to register the interarch relationship by using a reversing and superimposing (RAS) technique
Summary
Complete dentures have been manufactured using a conventional workflow, which requires multiple visits of the patients to a dental clinic and complex laboratory procedures [1,2]. With recent advances in computer-aided design and computer-aided manufacturing (CAD-CAM) technology, the digital design and fabrication of complete dentures have become an active area of research. The advantages of this workflow include the elimination of cumbersome denture tooth arrangement and subsequent resin injection or packing and reproducibility of the dentures, which can be attributed to the use of a digital workup; the designed data file can be stored in a backup device and reused later to manufacture the same denture [3]. A barrier for complete digitization is the inability to establish a three-dimensional (3D)
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