SUMMARYDislocation of the trial femoral head is a rare and unpleasant event that can compromise the success of the total hip arthroplasty. A 62-year-old Caucasian woman with osteoarthritis was admitted to our Department and underwent an elective total hip arthroplasty. While performing the dislocation manoeuver the trial femoral head dissociated from the taper in the superior and anterior direction in the soft tissue and could not be retrieved immediately. The operation was then executed and finished in an ordinary manner. Three months after discharge from our department patient presented with the pain in the hip and groin and periprosthetic joint infection was diagnosed. The successful second operation for the retrieval of the dislocated trial femoral head was conducted through ilioinguinal approach. In this paper we reviewed the published literature and developed the algorithm for the decision-making while dealing with the dislocated and lost trial femoral head. BACKGROUND

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The anterolateral ligament is recently recognized as an important structure in restoring rotational stability of the anterior cruciate ligament‐deficient knee. Biomechanical and clinical studies confirmed the benefits of concurrent anterior cruciate ligament and anterolateral ligament reconstruction. However, present techniques mostly use hamstring tendons autografts and therefore additionally disrupt the knee biomechanics. The plantaris tendon is a well known and accessible graft and has excellent biomechanical properties for anterolateral ligament reconstruction. The present paper describes a new combined anterior cruciate ligament and anterolateral ligament reconstruction technique using plantaris tendon and semitendinosus tendon. Level of evidence V (Case report).

Mišić plantaris je mali mišić površnog stražnjeg odjeljka noge karakteriziran najdužom tetivom u ljudskom tijelu. Istraživanja ukazuju da je plantaris rudimentarni mišić sa zanemarivom biomehaničkom funkcijom. Tetiva mišića plantarisa odavno je prepoznata kao lako dostupan presadak kod raznih rekonstruktivnih zahvata u ortopediji. Anterolateralni ligament koljena predstavlja važan čimbenik uspostave rotacijske stabilnosti kod koljena kojem nedostaje funkcija prednjeg križnog ligamenta. Tetiva mišića plantarisa ima odlična biomehanička svojstva za rekonstrukciju anterolateralnog ligamenta. U ovom kratkom preglednom radu prikazana je nova operacijska tehnika zajedničke rekonstrukcije prednjeg križnog ligamenta i anterolateralnog ligamenta koljena uz presatke tetiva mišića semitendinozusa i plantarisa.