Abstract
Since its creation in 1974, the Dual Mobility Cup (DMC) has been gaining in popularity, especially in the past decade. This intensive use could lead to inappropriate use and consequently to an increased complication rate. Compliance with conceptual requirements and surgical techniques will prevent the occurrence of complications that can be wrongly attributed to implants. In this context, we feel that it is essential to share our tips and tricks as well as an overview and an explanation of common errors, based on more than 45 years of clinical and research experience. From basic principles, including indications, implant choice and implant compatibility, to surgical tips, in this article orthopedic surgeons will find a practical overview of DMC in order to use it safely and with confidence.
Highlights
Total Hip Arthroplasty (THA) is one of the most successful procedures in orthopedic surgery
The Dual Mobility Cup (DMC) concept combines Charnley’s lowfriction arthroplasty principle [3], in which a small-diameter head articulates with an ultra-high molecular weight polyethylene (UHMWPE) liner, and the McKee-Farrar principle [4], in which a head with similar dimensions to the native femoral head articulates with a cup to increase the stability of the prosthetic joint
Compliance with conceptual requirements and surgical techniques will prevent the occurrence of complications that can be wrongly attributed to implants
Summary
Total Hip Arthroplasty (THA) is one of the most successful procedures in orthopedic surgery. This combination is possible because the DMC liner maintains mobility within the metal cup. The DMC system is composed of a cup, a mobile liner, and a femoral head impacted on the femoral stem (Table 2).
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