Fracture behavior of metal-ceramic fixed dental prostheses with frameworks from cast or a newly developed sintered cobalt-chromium alloy

Abstract

FDPs based on CAD/CAM milled and sintered frameworks may be an applicable and less technique-sensitive alternative to frameworks that are based on conventionally cast frameworks.

Comparison of Retention Forces of Different Fabrication Methods of Co-Cr Crowns: Pre-sintered and Milled, Cast and Electroforming Secondary Crowns with Different Taper Angles

“…However, our study confirmed the result of a former study, which also showed almost no differences of retention forces in the range of 0° and 2° [24]. The similar trend of both fabrication methods, milling and casting Co-Cr alloy, has already been examined considering the fracture load of FDPs, showing no significant difference between milled and sintered and conventionally cast frameworks [7]. This trend seems to be in agreement to the retention forces measured in the present study and confirmed by the fact that the influence of taper angle exceeded the influence of the fabrication method [6].…”

“…One of these chalky blanks has already been examined in regard to the fracture behavior of fixed dental prostheses (FDPs). It emerged that the Sintron frameworks, being CAD/CAM milled and sintered, were comparable to conventional casted frameworks [7]. 15,17] and few complications [17], confirm the usage of Co-Cr alloy for RDPs.…”

“…A few different fabrication methods, based on laser sintering [2], casting [6,7] or milling [2] are known to produce prosthodontic made of Co-Cr alloys. The laser sintering process, a relatively new method bringing Co-Cr alloy into its final form, fuses together Co-Cr granules in layers by using a carbon dioxide laser beam [2].…”

“…The laser sintering process, a relatively new method bringing Co-Cr alloy into its final form, fuses together Co-Cr granules in layers by using a carbon dioxide laser beam [2]. This sustainable procedure impresses with its little material wear [2] but the costs and technical effort seem to be rather unprofitable for small dental companies [7] and is therefore in rare use. Casting Co-Cr alloy occurs with the traditional proven lost-wax technique [8] depending on technical skills and hand-made fitting [6], whereas the milling process allows using industrial prefabricated homogenous blanks [9].…”

Microstructures and Mechanical Properties of Co-Cr Dental Alloys Fabricated by Three CAD/CAM-Based Processing Techniques

“…The production of metallic restorations in the dental laboratory has conventionally been carried out using the traditional cast method based on the lost wax process [1,2,3]. Although the alloys of choice were gold-based when the casting technique was first developed, they were gradually replaced by base-metal alloys such as nickel-chromium (Ni-Cr) and cobalt-chromium (Co-Cr) alloys [2,4].…”