Ligamentum Teres and its Analog in the Hip Endoprosthesis – Necessary or Superfluous? A Systematic Review

Abstract

301 SUMMARY Background. Dislocation of hip endoprosthesis remains a common and serious complication of arthroplastic interventions. One of the ways to prevent endoprosthesis dislocation is to integrate a ligamentum teres analog into its design. Purpose. Reviewing international experience in the design, development and insertion of hip endoprosthesis with the native ligamentum teres or its analog. Materials and methods. A systematic patent and non-patent search and analysis of publications on hip endoprostheses with native ligamentum teres or its artificial analog. The search was done on relevant online platforms and in available libraries. Results. To date, there are 20 identified patents on endoprosthesis designs with the native ligamentum teres or its analog. Ligamentum teres analogs are proposed to be created using auto-, alloor xenografts, synthetic materials and metals. We have found two subtotal endoprosthesis with ligamentum teres analogs that are used in clinical practice. The long-term outcomes of such surgeries are not known. There are no commercially available endoprostheses with ligamentum teres analogs. Conclusions. A ligamentum teres analog integrated into a hip endoprosthesis can help prevent dislocation in the post-operative period. Further theoretical, experimental, biomechanical and clinical studies are needed to develop such endoprostheses for a wider use.