Removable Partial Dentures: Use of Rapid Prototyping

Lima, J.M.C.; Anami, Lilian Costa; Araújo, Ricardo; Pavanelli, Carlos Augusto

doi:10.1111/jopr.12154

Cited by 75 publications

(58 citation statements)

References 19 publications

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“…Furthermore, the CADcast technique takes advantage of low‐cost methods, such as broken arm casting; however, in a 2013 review by Lima et al, one of the conclusions was that laboratories producing RPD frameworks do not commonly implement CAD/CAM and AM technologies in their manufacturing processes. Some of the reasons cited for this were the high costs associated with the AM machinery and the need for well‐trained lab technicians in digital design, as the techniques remain error prone . Notably, in the present investigation, the laboratory that employed the CADcast technique routinely uses this technique for framework fabrication.…”

Section: Discussionmentioning

confidence: 95%

“…2 CAD is commonly used in fixed prosthodontics and is gaining greater acceptance in removable applications, such as removable partial dental (RPD) prosthesis, complete denture, and overdenture fabrication. 3 As might be expected, AM provides an efficient method for manufacturing complex dental prostheses. Nevertheless, more research in this domain is needed.…”

mentioning

confidence: 90%

“…Alharbi et al, in a review of additive manufacturing (AM) in prosthodontics, concluded that AM is promising but noted that understanding the current limitations and materials science behind the technology is critical . CAD is commonly used in fixed prosthodontics and is gaining greater acceptance in removable applications, such as removable partial dental (RPD) prosthesis, complete denture, and overdenture fabrication . As might be expected, AM provides an efficient method for manufacturing complex dental prostheses.…”

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confidence: 99%

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Assessing the Accuracy of Casting and Additive Manufacturing Techniques for Fabrication of a Complete Palatal Coverage Metal Framework

Forrester

Sheridan

Phoenix

2019

Journal of Prosthodontics

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Purpose To provide information regarding the accuracy of additive manufacturing in comparison to conventional casting, specifically for fabrication of complete palatal coverage metal frameworks. Materials and Methods Three additive manufacturing techniques were tested: selective laser melting (SLM), electron beam melting (EBM), and computer‐aided design/cast (CADcast), with conventional casting as the control. Both the SLM and EBM groups were tested pre‐ and post‐finishing, for a total of six test groups (n = 10/group). A digital master design was used as the standard to which all frameworks were digitally compared by best‐fit analysis, which generated root mean square values using proprietary software. A one‐way ANOVA was conducted to test for statistical differences among materials, followed by a post‐hoc multiple comparison test (Tukey's test HSD). Surface roughness for one framework arbitrarily selected from each group was analyzed using a profilometer. Results There was a significant difference in accuracy among the materials (F = 99.79, p < 0.0001). A post‐hoc Tukey test indicated that CADcast differed significantly from the other five materials (i.e., most accurate, p < 0.01). EBM prefinished and EBM finished were both significantly different from the other materials (i.e., least accurate). Color mapping images help visualize the differences between each framework compared to the master design. The surface roughness values ranged from 22 to 63.5 µm, with CADcast being the smoothest, and EBM prefinished the roughest. Conclusions CADcast and SLM techniques were as or more accurate than the conventional technique for producing an uncomplicated framework design. Further investigation is recommended regarding the surface roughness of additive manufacturing products and potential biological complications.

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Section: Discussionmentioning

confidence: 95%

mentioning

confidence: 90%

mentioning

confidence: 99%

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Assessing the Accuracy of Casting and Additive Manufacturing Techniques for Fabrication of a Complete Palatal Coverage Metal Framework

Forrester

Sheridan

Phoenix

2019

Journal of Prosthodontics

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“…7,8 Different methods were introduced in the last few decades for fabricating RPD frameworks without using casting techniques. 6,9,10 A new additive manufacturing (AM) process based on laser-sintering has been developed for processing 3-D metal objects. The laser-sintering technique combines computer-aided design (CAD) of any products and their subsequent fabrication using a highpower laser that fuses metal powder in a layer-by-layer pattern.…”

Section: Introductionmentioning

confidence: 99%

“…[10][11][12][13][14][15] Laser-sintering technology can be described using different terminologies, such as selective laser melting (SLM), selective laser-sintering (SLS), or direct metal laser-sintering (DMLS). 6,9,12,13 SLM involves full melting of the metal powder; while, both SLS and DMLS involve partial melting of some the metal powder, particularly melting at the surface of the particle. [12][13][14] The main difference between SLS and DMLS is that SLS powder can be metal or other materials (e.g., ceramic or polymer), and the powder only partially melts during the process, [12][13][14][15][16] whereas DMLS uses a mixture of metal powders with different melting temperatures (high or low).…”

Section: Introductionmentioning

confidence: 99%

Removable partial denture alloys processed by laser‐sintering technique

et al. 2017

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Removable partial dentures (RPDs) are traditionally made using a casting technique. New additive manufacturing processes based on laser sintering has been developed for quick fabrication of RPDs metal frameworks at low cost. The objective of this study was to characterize the mechanical, physical, and biocompatibility properties of RPD cobalt-chromium (Co-Cr) alloys produced by two laser-sintering systems and compare them to those prepared using traditional casting methods. The laser-sintered Co-Cr alloys were processed by the selective laser-sintering method (SLS) and the direct metal laser-sintering (DMLS) method using the Phenix system (L-1) and EOS system (L-2), respectively. L-1 and L-2 techniques were 8 and 3.5 times more precise than the casting (CC) technique (p < 0.05). Co-Cr alloys processed by L-1 and L-2 showed higher (p < 0.05) hardness (14-19%), yield strength (10-13%), and fatigue resistance (71-72%) compared to CC alloys. This was probably due to their smaller grain size and higher microstructural homogeneity. All Co-Cr alloys exhibited low porosity (2.1-3.3%); however, pore distribution was more homogenous in L-1 and L-2 alloys when compared to CC alloys. Both laser-sintered and cast alloys were biocompatible. In conclusion, laser-sintered alloys are more precise and present better mechanical and fatigue properties than cast alloys for RPDs. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 1174-1185, 2018.

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Applications of additive manufacturing in dentistry: A review

et al. 2017

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Additive manufacturing (AM) or 3D printing has been hailed as the third industrial revolution as it has caused a paradigm shift in the way objects have been manufactured. Conventionally, converting a raw material to a fully finished and assembled, usable product comprises several steps which can be eliminated by using this process as functional products can be created directly from the raw material at a fraction of the time originally consumed. Thus, AM has found applications in several sectors including automotive, aerospace, printed electronics, and healthcare. AM is increasingly being used in the healthcare sector, given its potential to fabricate patient-specific customized implants with required accuracy and precision. Implantable heart valves, rib cages, and bones are some of the examples where AM technologies are used. A vast variety of materials including ceramics, metals, polymers, and composites have been processed to fabricate intricate implants using 3D printing. The applications of AM in dentistry include maxillofacial implants, dentures, and other prosthetic aids. It may also be used in surgical training and planning, as anatomical models can be created at ease using AM. This article gives an overview of the AM process and reviews in detail the applications of 3D printing in dentistry. © 2017 Wiley Periodicals, Inc. J Biomed Mater Res Part B: Appl Biomater, 106B: 2058-2064, 2018.

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Removable Partial Dentures: Use of Rapid Prototyping

Cited by 75 publications

References 19 publications

Assessing the Accuracy of Casting and Additive Manufacturing Techniques for Fabrication of a Complete Palatal Coverage Metal Framework

Assessing the Accuracy of Casting and Additive Manufacturing Techniques for Fabrication of a Complete Palatal Coverage Metal Framework

Removable partial denture alloys processed by laser‐sintering technique

Applications of additive manufacturing in dentistry: A review

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