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Chapter 9242improve these existing TMJ stock prosthesis concepts, all physiological movements that are required for the abovementioned functions of a normal TMJ should be restored on both the replaced and contralateral (healthy or replaced) sides. The objective of this article is to discuss the development of such an improved TMJ prosthesis, called the TMJ Parametro (Figs. 1a, b; Video 1) (CADskills BV, Ghent, Belgium).Materials and MethodsAll the procedures in studies involving human participants were performed in accordance with the ethical standards of the institutional and/or national research committee (Centraal Studieloket, UZ Brussel, Code of approval: EC-2022-075) and with the 1964 Helsinki Declaration and its later amendments or comparable ethical standards. The authors certify that they have obtained all appropriate patient consent forms. On the form, the patients have given their consent for their images and other clinical information to be reported in this journal. This study encloses a descriptive technical review/report, a summary of the early results and two case studies.Implant DesignMetallic component.The mandibular component and the skull base segment of the fossa component are additively manufactured using a Ti6Al4V ELI. The condyle is resurfaced using a diamond-like carbon (DLC) coating (Figs. 1c, 2), which is applied using the nondisclosed HadSat protocol with a Vickers hardness (HV0.05) of 3500 ± 500 and a friction coefficient of 0.1. The HadSat coating is a nontoxic, carbon-based coating that meets the Food and Drug Administration guidelines. The biocompatibility of this coating was tested under the International Standard ISO 10993-1 by the North American Science Associates. The test results are summarized in Table 1. Nikolas de Meurechy NW.indd 242 05-06-2024 10:14