Demand for total joint arthroplasty is projected to increase in the first three decades of the twenty-first century. With increasing frequency, patients who have a hip or knee replacement expect to, and choose to, participate in athletics following rehabilitation. In general, patients who have had a hip or knee replacement decrease their participation in, and intensity of, athletic activity following the total joint arthroplasty. The orthopaedic literature on athletic activity after total joint arthroplasty is limited to small retrospective studies with short-term follow-up. Expert opinion regarding appropriate athletic activity after total joint arthroplasty is available from the Hip Society and the Knee Society. When patients who have undergone joint replacements choose to participate in athletic activity, orthopaedic surgeons should provide information with which to evaluate the risk of sports activity and recommend appropriate athletic activity.

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Background Despite the importance of complications in evaluating patient outcomes after TKA, definitions of TKA complications are not standardized. Different investigators report different complications with different definitions when reporting outcomes of TKA.

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The first decade of the 21st century has been declared the "Bone and Joint Decade" by 35 nations and 44 states in the United States as of March 2001. It is not surprising that Americans are interested in musculoskeletal disease and the treatment of bone and joint disorders because our population is aging, the prevalence of arthritic joints is increasing, and senior Americans are demonstrating a strong desire to stay active in activities of daily living and athletics. One of the most successful treatments for painful arthritic joints, which limit activity, is total joint replacement, which predictably relieves pain and improves function. Much has been written about the technical aspects of total joint arthroplasty. Less has been written about safe and appropriate activities for patients who have had joint replacement operations. This article evaluates athletic activity after joint replacement by reviewing the orthopaedic literature and surveying members of The Hip Society, The Knee Society, and The American Shoulder and Elbow Surgeons Society. The authors have developed consensus recommendations for appropriate athletic activity for patients who have had joint replacement operations. This article is intended to serve as a guide for orthopaedic surgeons and primary care physicians who give patients recommendations for athletic activity after joint replacement. This article is also intended to stimulate further research in the area of athletic activity after total joint arthroplasty.

Aims A variety of surgical approaches are used for total hip arthroplasty (THA), all with reported advantages and disadvantages. A number of common complications can occur following THA regardless of the approach used. The purpose of this study was to compare five commonly used surgical approaches with respect to the incidence of surgery-related complications. Patients and Methods The electronic medical records of all patients who underwent primary elective THA at a single large-volume arthroplasty centre, between 2011 and 2016, with at least two years of follow-up, were reviewed. After exclusion, 3574 consecutive patients were included in the study. There were 1571 men (44.0%) and 2003 women (56.0%). Their mean age and body mass index (BMI) was 63.0 years (sd 11.8) and 29.1 kg/m2 (sd 6.1), respectively. Data gathered included the age of the patient, BMI, the American Society of Anesthesiologists (ASA) score, estimated blood loss (EBL), length of stay (LOS), operating time, the presence of intra- or postoperative complications, type of complication, and the surgical approach. The approaches used during the study were posterior, anterior, direct lateral, anterolateral, and the northern approach. The complications that were recorded included prolonged wound drainage without infection, superficial infection, deep infection, dislocation, aseptic loosening, and periprosthetic fracture. Finally, the need for re-operation was recorded. Means were compared using analysis of variance (ANOVA) and Student’s t-tests where appropriate and proportions were compared using the chi-squared test. Results A total of 248 patients had 263 complications related to the surgery, with an incidence of 6.94%. The anterior approach had the highest incidence of complications (8.5% (113/1329)) and the posterior approach had the lowest, at 5.85% (97/1657; p = 0.006). Most complications were due to deep infection (22.8%), periprosthetic fracture (22.4%), and prolonged wound drainage (21.3%). The rate of dislocation was 0.84% (14/1657) with the posterior approach and 1.28% (17/1329) with the anterior approach (p = 0.32). Conclusion Overall, THA has a relatively low complication rate. However, the surgical approach plays a role in the incidence of complications. We found that the posterior approach had a significantly lower overall complication rate compared with the anterior approach, with an equal dislocation rate. Periprosthetic fracture and surgical site infection contributed most to the early complication rates. Cite this article: Bone Joint J 2019;101-B:646–651

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