ion of final TKA component sizes. Further studies to optimize parameters and predictions for the algorithms are ongoing.Phocomelia is a rare congenital birth defect marked by hypoplastic or markedly absent limbs. Developmental dysplasia of the hip (DDH) is a congenital disorder with a failure of the native acetabulum to provide complete coverage over the femoral head. The secondary osteoarthritis that develops from DDH is technically challenging for orthopedic surgeons because of distorted anatomy. The present case describes the diagnosis of Crowe 3 DDH in a phocomelia patient with hyperflexion requirements who successfully underwent staged bilateral total hip arthroplasty via a direct anterior approach. It highlights the utility of preoperative computerized tomography and intraoperative computer navigation to assist in implant placement. Recognizing difficult arthroplasty cases in advance is imperative as these cases may require great expertise and more extensive surgical planning.In revision total knee arthroplasty, joint kinematics must be maintained amid bone and ligamentous insufficiency. Current modular designs address defects while allowing for intraoperative prosthesis customization through a variety of stem extensions and constraints. Additional constraint improves knee stability while increasing stress at the implant-host interface and modular junction of the implant. This renders the prosthetic stem-condyle junction more prone to fatigue failure. We report 2 cases of prosthetic stem-condyle junction failure in in a varus-valgus constrained revision total knee arthroplasty. The prevalence of venous thromboembolism (VTE) after total joint arthroplasty (TJA) is 0.40%-1.2%. Trends in TJA are for shorter hospital stays with lower complication rates. click here The aim of this study is to evaluate whether hospital length of stay (LOS) is associated with risk of a thromboembolic event after TJA. This was a retrospective study of patients undergoing TJA during 2013-2017 at Louisiana and Texas hospitals. Univariable analyses and multivariable logistic regression examined patient characteristics (sex, race, age, body mass index, Charlson Comorbidity Index, TJA type, and LOS) associated with experiencing a VTE event after discharge and before 1-year follow-up. Of the 13,969 patients who met inclusion criteria, 338 (2.4%) had a VTE event after discharge. In multivariable regression analysis, more severe comorbidities (odds ratio 1.30, 95% confidence interval 1.23-1.37; < .001) and LOS days (odds ratio 1.07, 95% confidence interval 1.01 to 1.14; = .0215) were associated with an increased risk of VTE. Patients with more severe comorbidities or a longer LOS had a greater risk of VTE after discharge following TJA.Patients with more severe comorbidities or a longer LOS had a greater risk of VTE after discharge following TJA.The popularity of yoga and the prevalence of total hip arthroplasty (THA) have simultaneously increased in the United States. Accordingly, one can assume that the number of THA patients practicing yoga has increased. Certain yoga poses reach the extremes of hip range of motion, potentially leaving patients vulnerable to dislocation. To date, 2 cases of late posterior prosthetic hip dislocations during yoga have been reported; however, there have been no reports of anterior prosthetic hip dislocations. We present one case of late anterior prosthetic hip dislocation during yoga in a patient who underwent THA via the direct anterior approach. Prosthetic hip dislocation during yoga may be a growing concern. We provide additional evidence in support of recommendations for THA patients to safely practice yoga.There has been a significant increase in the use of modular dual mobility (MDM) acetabular cups for primary and revision total hip arthroplasty (THA) secondary to decreased dislocation rate and increased impingement-free range of motion. Mating of dissimilar metals in THA can result in mechanically assisted crevice corrosion, with increased serum metal ion levels and potentially adverse local tissue reaction that can lead to revision surgery. In this case report, we present a patient who had THA using MDM components, and his follow-up laboratory testing showed asymptomatic elevated serum cobalt level. The patient subsequently developed an intraprosthetic dislocation that required revision surgery. At the time of revision, significant corrosion was noted on the backside of the modular acetabular liner and the inner surface of the titanium shell. Serum cobalt levels returned to normal after revision surgery. This case suggests that mechanically assisted crevice corrosion at the modular surface of MDM components does occur. In addition, we believe surgeons should judiciously use MDM technology only for patients at significantly increased risk of dislocation after THA. The COVID-19 pandemic led to cancelation of all elective surgeries for a time period in the vast majority of the United States. We compiled a questionnaire to determine the physical and mental toll of this delay on elective total joint arthroplasty patients. All patients whose primary or revision total hip or knee arthroplasty was canceled because of the COVID-19 pandemic at a large academic-private practice were identified. An 11-question survey was administered to these patients via email. All data were deidentified and stored in a REDCAP database. Of 367 total patients identified, 113 responded to the survey. Seventy-seven percent of patients had their surgery postponed at least 5 weeks, and 20% were delayed longer than 12 weeks. Forty-one percent of patients reported an average visual analog scale pain score greater than 7.5. Forty percent of respondents experienced increased anxiety during the delay. Thirty-four percent of patients felt their surgery was not elective. Sixteen percent experienced a fall during the delay, and 1 patient sustained a hip fracture. Level of pain reported was significantly associated with negative emotions, negative effects of delay, and whether patients felt their surgery was indeed elective. Seventy-six percent reported trust in their surgeon's judgment regarding appropriate timing of surgery. Communication was listed as the number one way in which patients felt their surgeon could have improved during this time. Surgical delay due to the COVID-19 pandemic resulted in increased pain and anxiety for many total joint arthroplasty patients. While most patients maintained trust in their surgeon during the delay, methods to improve communication may benefit the patient experience in future delays. Level II.Level II.