Dislocation risk after robotic arm-assisted total hip arthroplasty: a comparison of anterior, lateral and posterolateral approaches.

Aims: Dislocation is a major cause of early failure after THA and is highly influenced by surgical approach and component positioning. Robotic-arm assisted arthroplasty has been developed in an attempt to improve component positioning and reduce postoperative complications.The purpose of this study was to compare the rate of dislocation after robotic total hip arthroplasty through 3 different surgical approaches.

Blood transfusion, hospital stay and learning curve in robotic assisted total hip arthroplasty.

Total Hip Arthroplasty (THA) has been defined the surgical procedure of the century considering its outcome and cost-benefit ratio (1). Both standard and robotic assisted procedures are increasing, thus, comparison between standard and robotic surgery become useful to understand the cost-benefit of the latter. The prerequisites of the robotic assisted arthroplasty are precision, accuracy, limitation of errors and safety but, on the other hand, its cost is the main drawback.

Evaluation of Native Femoral Neck Version and Final Stem Version Variability in Patients With Osteoarthritis Undergoing Robotically Implanted Total Hip Arthroplasty.

Background: Combined anteversion in total hip arthroplasty influences both dislocation risk and range of motion. One of its components, stem version (SV), could be dictated by many factors, from native femoral anatomy to stem geometry and surgeon's choice. In the present multicenter study, robotic technology was used to assess the influence of native femoral version on final SV and combined anteversion using a straight, uncemented stem.

Scaffolds combined with stem cells and growth factors in healing of pseudotumoral lesions of bone.

Reconstructions of large lesions or defects often require a bone graft or a bone substitute to promote healing. In common practice the reconstruction of a bone defect is dependent on the site and size of the lesion: in long bones intercalary defects may be managed with Ilizarov technique of bone transport and distraction osteogenesis or the use of a free or pedicled vascularized bone graft, or with Masquelet technique. For cavitary defects the available surgical options include autograft, allograft or xenograft or the use of synthetic scaffolds to promote bone regeneration.

Indications and limits of hybrid hip prostheses (cementless acetabulum and cemented stem).

The authors report the indications and short-term results obtained in a series of 99 total hip prostheses with a screwed acetabulum and cemented stem. The principles which inspired their choice and the criteria used to select patients are discussed. The results obtained, evaluated both clinically and radiographically, are satisfactory, particularly with regards to percentage of pain symptoms in the femur.