The ROBODOC system was designed to address potential human errors in performing cementless total hip replacement. The system consists of a preoperative planning computer workstation (called ORTHODOC) and a five-axis robotic arm with a high speed milling device as an end effector. The combined experience of the United States Food and Drug Administration multicenter trial and the German postmarke...

T he concept of twofers is widely used in a variety of situations and applications ranging from cabling devices in theatrical stage lighting to Broadway tickets to 2 hamburgers for a quarter at Tucker’s Twofers to items of merchandise to something that “satisfies 2 criteria or needs simultaneously.” The paper by Petronio et al. (1), in this issue of JACC: Cardiovascular Interventions, takes thi...

Temporomandibular disorders (TMD) are part of a heterogeneous group of pathologies that manifest with a constellation of signs and symptoms. They are the most frequent cause of chronic orofacial pain and are prevalent in 12% of the general population. Despite the debilitating nature of these disorders, there is no standardization for treatment of the diseased temporomandibular joint (TMJ). In t...

This paper reviews the recent advancements in computational modelling of lubrication hip and knee joint replacements, especially those concerning Professor Duncan Dowson’s contribution. The review starts with development five key parameters that appeared pioneered Hamrock–Dowson formula. Then, theory approaches for mixed which artificial replacements operate are reviewed. We also discuss curren...