[Total endoprosthesis replacement after hip joint arthrodesis].

Purpose Of The Study: To evaluate mid-term results of conversion of arthrodesis to total hip replacement in terms of X-ray findings and benefits for the patient.

Material: Ten patients who had undergone hip joint arthrodesis were clinically examined and X-rayed and the findings evaluated. The most common indications for arthrodesis were posttraumatic lesions or the sequelae of a dysplastic hip joint, Perthes disease and inflammatory hip arthritis.

[Revision of total hip replacement operations at the Orthopedic Clinic IPVZ in Prague, 1999].

Purpose Of The Study: The aim of the work is to evaluate the results of revision surgeries of total hip replacements at the Orthopaedic Department IPVZ in 1999.

Material: Revision surgery of 61 THR was performed at the Orthopaedic Department IPVZ in 1999. Most of them (54) were reoperated for aseptic loosening of the cup or both components, 4 patients for aseptic loosening of the stem, 1 patient was reoperated for recurring dislocation of THR and 2 patients for septic loosening.

[The Zweymuller endoprosthesis in hip joint revision surgery].

Purpose Of The Study: The aim of the study is the verification of the applicability of the Zweymüller system of total hip replacement in dependence on the size of defects of acetabulum and femur and evaluation of early results in patients operated on in 1998 and 1999.

Material: In 1998 and 1999 we reimplanted 125 total hip replacements. In 60 revision surgeries we used at least one component of Zweymüller Bicon Plus system.

[Indications for the cementless Zweymuller Bicon cup in acetabular fractures].

Purpose Of The Study: The aim of the study is an assessment of short-term results after the implantation of cementless Zweymüller Bicon cup in patients with a complicated anatomy after acetabular fractures.

Material: The group of 10 patients indicated for Zweymüller cementless THR in post-traumatic osteoarthritis after acetabular fracture was selected of the total number of 703 primary implantations performed in 1998 and 1999 at the authors' Orthopaedic Department. The group includes patients treated conservatively as well as by means of open reduction and fixation.

[Medium-term Experience with Zweymüller's Bicon Plus Cup in the Treatment of Postdysplastic Osteoarthritits of the Hip Joint.].

The authors retrospectively evaluate a group of 28 hip joints in which in 1995 and 1996 total hip replacement was performed for developmental dysplasia of the hip joint. They included in the study only patients with dysplasia of types B, C and D after Eftekhar. By means of the method after Ranawat and Pagnan they determine the ideal centre of the rotation of the hip join and the so called TAR-true acetabular region.