[Return to Sports After Arthroplasty].

Arthroplasty of the hip has become one of the most successful surgical interventions and has seen significant advancements over the last century. With these developments, patient expectations have shifted from merely achieving pain-free daily mobility to anticipating a full recovery, including the ability to participate in sports. This shift has driven innovations in prosthetic materials and surgical techniques, such as the development of wear-resistant materials like highly cross-linked polyethylene and the adoption of minimally invasive procedures to enhance recovery.

No shortening of the patellar tendon during two-stage total knee arthroplasty revision using articulating spacers.

Background: Surgical techniques in two-stage revision total knee arthroplasty (rTKA) include the use of articulating spacers and static spacers. Shortening of the patellar tendon could be a reason for inferior functional outcomes in two-stage septic rTKA . The aim of this study was to determine if articulating spacers also have negative effects on the extensor mechanism in rTKA.

Impact of intra- and extramedullary alignment on blood loss in total knee arthroplasty: a retrospective study.

Background: There is a scarcity of scientific data regarding the correlation between alignment techniques during total knee arthroplasty (TKA) and blood loss as well as transfusion rates. This study's hypothesis posited that intramedullary-aligned (IM) TKA exhibits higher blood loss and transfusion rates when contrasted with extramedullary-aligned (EM) TKA.

Methods: We conducted a retrospective examination of 883 patients who underwent total knee arthroplasty (TKA) in 2021 at a solitary orthopedic center in Germany.

Predicting whether patients will achieve minimal clinically important differences following hip or knee arthroplasty.

Aims: A substantial fraction of patients undergoing knee arthroplasty (KA) or hip arthroplasty (HA) do not achieve an improvement as high as the minimal clinically important difference (MCID), i.e. do not achieve a meaningful improvement.

Cemented and hybrid total hip arthroplasty lead to lower blood loss in primary total hip arthroplasty: a retrospective study.

Background: Little scientific evidence exists on blood loss and transfusion rates depending on the fixation technique. The hypothesis of this study was that the blood loss and transfusion rate are lower in cemented and hybrid total hip arthroplasty (THA) compared to cementless THA.

Methods: We retrospectively compared a total of 1500 patients who received either cementless, cemented, hybrid or reverse hybrid THA.

Imageless robotic-assisted total knee arthroplasty is accurate in vivo: a retrospective study to measure the postoperative bone resection and alignment.

Purpose: Conventional instruments for total knee arthroplasty (TKA) have limited accuracy. The occurrence of outliers can negatively influence the clinical outcome and long-term survival of the implant. Orthopaedic robotic systems were developed to increase the accuracy of implant positioning and bone resections.

Blood transfusion and venous thromboembolism trends and risk factors in primary and aseptic revision total hip and knee arthroplasties: A nationwide investigation of 736,061 cases.

Background: Over the last years, new transfusion guidelines and pharmaceuticals have been introduced in primary and revision total hip and knee arthroplasty (P-THA, P-TKA, R-THA, R-TKA). In the US, a substantial decrease in transfusions has been observed in recent years. Little data exists on the subject in Europe.

No Major Functional Benefit After Bicompartmental Knee Arthroplasty Compared to Total Knee Arthroplasty at 5-Year Follow-Up.

Background: In case of isolated medial and patellofemoral joint arthritis, bicompartmental knee arthroplasty (BCA) is an alternative to total knee arthroplasty (TKA). The purpose of our prospective, randomized study is to compare the clinical outcome of BCA vs TKA.

Methods: Eighty patients with isolated medial and patellofemoral osteoarthritis were randomly assigned to either BCA or TKA.

Obesity Increases the Risk of Postoperative Complications and Revision Rates Following Primary Total Hip Arthroplasty: An Analysis of 131,576 Total Hip Arthroplasty Cases.

Background: The aim of our study is to evaluate the association of body mass index (BMI) and the risk of postoperative complications, mortality, and revision rates following primary total hip arthroplasty given other potentially confounding patient characteristics in a large cohort study.

Methods: Using nationwide billing data for inpatient hospital treatment of the biggest German healthcare insurance, 131,576 total hip arthroplasties in 124,368 patients between January 2012 and December 2014 were included. Outcomes were 90-day mortality, 1-year revision procedures (with and without removal or exchange of implants), 90-day surgical complications, 90-day femoral fractures, and overall complications.

[Impact of Case Numbers on the 5-Year Survival Rate of Unicondylar Knee Replacements in Germany].

Background: Reported survival rates of unicondylar knee arthroplasty (UKA) vary considerably. The influences of patient characteristics and the type of implant have already been examined. This analysis investigated the influence of hospital volume on 5-year-survival rate, using administrative claims data of Germany's largest health insurance provider.

Major acetabular defects treated with the Burch-Schneider antiprotrusion cage and impaction bone allograft in a large series: a 5- to 7- year follow-up study.

Introduction: Major bone defects are the greatest challenge in hip revision arthroplasty.

Methods: In a prospective, consecutive nonrandomised study we followed up 74 patients with Type III (AAOS) acetabular bone defects who underwent revision hip arthroplasty with bone grafting and implantation of a Burch-Schneider anti-protrusion cage (APC). The patients were examined pre- and postoperatively according to a standardised clinical and radiological protocol.

Loading of the knee joint during ergometer cycling: telemetric in vivo data.

Study Design: Within-subject, repeated-measures design.

Objectives: To measure tibiofemoral contact forces during cycling in vivo and to quantify the influences of power, pedaling cadence, and seat height on tibiofemoral contact forces.

Background: Cycling is usually classified as a low-demand activity for the knee joint and is therefore recommended for persons with osteoarthritis and rehabilitation programs following knee surgery.

Peri-prosthetic femoral fractures treated with the uncemented Wagner revision stem.

The clinical and radiological results of Vancouver type B2 and B3 peri-prosthetic fractures treated with an uncemented Wagner revision stem (3rd generation) were analysed. Two groups were identified, 15 patients had a B2 and 14 cases a B3 periprosthetic fracture. The mean follow-up was 74 months after the index operation.

The effect of valgus braces on medial compartment load of the knee joint - in vivo load measurements in three subjects.

Knee osteoarthritis occurs predominately at the medial compartment. To unload the affected compartment, valgus braces are used which induce an additional valgus moment in order to shift the load more laterally. Until now the biomechanical effect of braces was mainly evaluated by measuring changes in external knee adduction moments.

ESB Clinical Biomechanics Award 2008: Complete data of total knee replacement loading for level walking and stair climbing measured in vivo with a follow-up of 6-10 months.

Background: Detailed information about the loading of the knee joint is required for various investigations in total knee replacement. Up to now, gait analysis plus analytical musculo-skeletal models were used to calculate the forces and moments acting in the knee joint. Currently, all experimental and numerical pre-clinical tests rely on these indirect measurements which have limitations.

A multiple-day regimen of parecoxib sodium 20 mg twice daily provides pain relief after total hip arthroplasty.

Background: This multicenter, multiple-dose, randomized, double-blind, parallel-group study compared the analgesic efficacy and safety of two dosing regimens of parecoxib sodium (parecoxib) versus placebo after total hip arthroplasty.

Methods: On study Day 1, 490 patients received a postoperative initial loading dose of IV parecoxib 40 mg, followed by a re-dose of parecoxib 20 mg in 484 of 490 patients. Subsequently, 479 randomized patients received double-blind treatment with parecoxib 20 mg bid (n = 159), parecoxib 20 mg qd (n = 159) followed by placebo, or placebo (n = 161) on Day 2.