Layered Manufacturing of Dental Ceramics: Fracture Mechanics, Microstructure, and Elemental Composition of Lithography‐Sintered Ceramic

Abstract

Within the limitations of this in vitro study, it can be concluded that LCM seems to be a promising technique for final ceramic object manufacturing in dental applications. Both the manufacturing method and the material used should be improved.

Fracture Resistance of Additively Manufactured Zirconia Crowns when Cemented to Implant Supported Zirconia Abutments: An in vitro Study

“…Today, most of the commercial systems utilize presintered ceramic blocks for milling dental restorations . However, the restoration is subjected to dimensional changes after further sintering that can compromise the integrity of the restoration . Also, a major proportion of the prefabricated ceramic blocks is discarded during the milling process …”

The potential of additive manufacturing technologies and their processing parameters for the fabrication of all‐ceramic crowns: A review

“…Given for their ease of machining, most of the commercial systems utilize presintered zirconia blocks for milling restorations . However, the restoration is subjected to dimensional changes due to thermal shrinkage associated with subsequent sintering, which can jeopardize the spatial integrity of the restoration . Furthermore, a major proportion of the prefabricated ceramic block is discarded at the culmination of the CNC milling process …”

“…Layer wise composition of the final restoration prevents the accumulation of tooling stresses associated with milling . Moreover, AM facilitates the production of complex geometries with fine details that cannot be reproduced by other methods . To date, there exists limited research pertaining to the application of AM for the fabrication of dental ceramics and the technology has not been commercially proclaimed for this purpose .…”

“…No significant difference was observed in the fracture toughness of SLA based alumina and milled zirconia, both being significantly higher than that of dry pressed alumina. The Weibull modulus of SLA manufactured alumina was found to be higher than milled zirconia and dry pressed alumina . Marion et al compared the 3 point flexural strengths and Weibull Moduli of SLA manufactured and SM alumina specimens.…”

“…26 However, the restoration is subjected to dimensional changes due to thermal shrinkage associated with subsequent sintering, which can jeopardize the spatial integrity of the restoration. 30 Furthermore, a major proportion of the prefabricated ceramic block is discarded at the culmination of the CNC milling process. 20 AM has the potential to circumvent the integral limitations associated with CNC milling of dental ceramics.…”