The use of larger femoral head size in total hip arthroplasty (THA) has increased during the past decade; 32 mm and 36 are most commonly used sizes, as reported by several registries. large heads seems to be a trade-off between stability decreased THA survivorship. We reviewed literature, mainly focussing on 5 years, identifying benefits complications associated with trend using THA. found that there is no benefit range movement or function when sizes > used. risk revision due dislocation...

Dislocation after total hip arthroplasty (THA) is a common reason for revision. The last decade fostered significant increase in the use of dual-mobility cups (DMCs). Here we report our study on short-term survival rate cemented DMC reported to Swedish Hip Arthroplasty Register (SHAR) compared with other designs used first-time revision due dislocation.During 2005-2015, 984 revisions dislocation were SHAR. In 436 these cases dual articular cup was used. During same time period, 355 performed...

Background and purpose Previous studies of patients who have undergone total hip arthroplasty (THA) due to femoral head necrosis (FHN) shown an increased risk revision compared cases with primary osteoarthritis (POA), but recent suggested that this procedure is not associated poor outcome. We the after operation THA FHN or POA in Nordic Arthroplasty Register Association (NARA) database including Denmark, Finland, Norway, Sweden.Patients methods 427,806 THAs performed between 1995 2011 were...

Patient reported outcome measurement (PROMs) will not capture in detail the functional joint motion before and after total hip arthroplasty (THA). Therefore, methods more specifically aimed to analyse movements may be of interest. An analysis method that addresses these issues should readily accessible easy use especially if applied large groups patients, who you want study both a surgical intervention such as THA. Our aim was evaluate accuracy inertial units (IMU) by comparison with an...

Compared with primary total hip arthroplasty (THA), revision surgery can be challenging. The cement-in-cement femoral technique involves removing a component from well-fixed cement mantle and cementing new stem into the original mantle. This is widely used when carried out for correct indications, fast, relatively inexpensive carries reduced short-term risk patient compared alternative of cement. We report outcomes this procedure two commonly stems are used.We identified 1179 revisions...

Background and purpose - The prevalence of obesity is on the rise, becoming a worldwide epidemic. main this register-based observational study was to investigate whether different BMI classes are associated with increased risk reoperation within 2 years, revision 5 dying 90 days after primary total hip arthroplasty (THA). We hypothesized that increasing would increase these risks. Patients methods analyzed cohort 83,146 patients who had undergone an elective THA for osteoarthritis between...

Radiostereometric analysis (RSA) is an accurate and precise measurement tool of migration rotation implants. We investigated if early measured with RSA can be used to predict the risk later aseptic loosening in acetabular revision surgery.A total 312 patients who underwent surgery were followed by measurements for 2 20 years. The endpoint was either re-revision due or on last available radiographic examination. Cox regression model evaluate predictive value migration.A 16 cups re-revised 7...

Background and purpose - The literature is scarce on the outcome of youngest patients with total hip arthroplasties (THAs). We analyzed register data, revision risk, related factors in 21 years or younger THAs Nordic Arthroplasty Register Association (NARA). Patients methods included all THA reported during 1995 through 2016 to Danish, Finnish, Norwegian, Swedish arthroplasty registers merged these into NARA dataset. Primary was any implant revision. Results identified 881 747 patients. Mean...

Background and purpose — Trabecular metal (TM) cups have demonstrated favorable results in acetabular revision their use primary total hip arthroplasty (THA) is increasing. Some evidence show that TM might decrease periprosthetic infection (PPI) incidence. We compared the survivorship of with other uncemented THA, evaluated whether associated a lower risk PPI.Patients methods 10,113 THAs cup 85,596 from 2 high-quality national registries were included. The mean follow-up times 3.0 years for...

Background and purpose - Uncemented stems are increasingly used in revision hip arthroplasty, but only a few studies have analyzed the outcomes of uncemented cemented large cohorts patients. We compared results stems. Patients methods 1,668 1,328 first-time revisions due to aseptic loosening between 1999 2016 were identified Swedish Hip Arthroplasty Register. Kaplan-Meier analysis was investigate unadjusted implant survival with re-revision for any reason as primary outcome. Hazard ratios...

Background and purpose: Computed tomography radiostereometric analysis (CT-RSA) assesses implant micromovements using low-dose CT scans. We aimed to investigate whether CT-RSA is comparable marker-based (RSA) measuring early femoral head migration in cemented stems. hypothesized that RSA evaluating subsidence.Methods: prospectively included 31 patients undergoing total hip arthroplasty (THA), of which 27 were eligible for the analysis. Femoral at 1 year was measured with CT-RSA. Comparison...

Surgical site infection (SSI) following orthopedic surgery impacts patient outcomes. Airborne transmission is one potential route of infection. Despite their high cost and resource demands, modern ventilation systems have shown limited efficacy in reducing SSI rates. This trial investigated the effectiveness a low-cost air purifier rates after surgery. In nationwide, multicenter, double-blind, cluster-randomized crossover, placebo-controlled superiority trial, we included all patients...

Surgical site infection (SSI) following orthopedic surgery is a complication associated with morbidity and economic burden. Transmission of airborne bacteria that settle into surgical wounds constitutes risk factor for SSIs. However, monitoring microbial contamination inside operating rooms conventional methods resource time-consuming. This study aimed to assess correlation between biofluorescent particle counter (BFPC) air sampling, enable real-time contamination. Additionally, the analyze...

Background and purpose - Several studies have reported on the influence of various factors patient-reported outcomes (PROs) after total hip arthroplasty (THA), but very few focused experience surgeon. We investigated any association between surgeons' PROs 1 year primary THA. Patients methods Patient characteristics surgical data at 10 hospitals in western Sweden were linked with (EQ-5D-3L, Satisfaction Visual Analogue Scale (VAS), Pain VAS). These retrieved from Swedish Hip Arthroplasty...

Long-lived plasma cells secreting vaccinia-specific antibodies are detected in human bone marrow >35 years after the eradication of smallpox.Long-lived still able to express B-lymphocyte antigen CD19.

Abstract Background During the past decade, 32-mm head has replaced 28-mm as most common size used in primary THA many national registries, and use of 36-mm heads also increased. However, it is unclear whether decrease revision risk metal-on-polyethylene (MoP) compared with heads. Questions/purposes (1) In setting Nordic Arthroplasty Register Association database, does for any reason differ among 28-, 32-, sizes patients undergoing surgery MoP THA? (2) Does resulting from dislocation...

Late chronic infection is a devastating complication after total hip arthroplasty (THA) and often treated with surgery. The one-stage surgical procedure believed to be the more advantageous from patient cost perspective, but there no consensus on whether one- or two-stage better option. We analysed risk for re-revision in infected primary THAs repaired either method. Data was obtained Swedish Hip Arthroplasty Register study groups were patients who had undergone (n = 404) 1250) revision due...

Background and purpose - Most earlier publications investigating whether annual surgeon volume is associated with lower levels of adverse events (AE), reoperations, mortality are based on patient cohorts from North America. There also a lack adjustment for important confounders in these studies. Therefore, we investigated higher risk within 90 days following primary total hip arthroplasty (THA). Patients methods We collected information arthroplasties (THA) performed between 2007 2016 10...

Aims While cementless fixation offers potential advantages over cemented fixation, such as a shorter operating time, concerns linger its higher cost and increased risk of periprosthetic fractures. If the fracture can be forecasted, it would aid shared decision-making process related to stems. Our study aimed develop validate predictive models femoral (PPFF) necessitating revision reoperation after elective total hip arthroplasty (THA). Methods We included 154,519 primary THAs from Swedish...

Background and purpose - The outcome of total hip arthroplasty (THA) in younger patients is suggested to be inferior compared with the general THA population. There a lack studies long-term follow up for very young patients. We report on implant survival patient-reported aged 30 years or younger. Patients methods Data THAs performed Sweden between 2000 2016 were included. 504 complete demographic surgical data (study group). A matched comparison group older than was identified. Implant...

Background and purpose: Computed tomography micromotion analysis (CTMA) can be used to determine implant micro-movements using low-dose CT scans. By CTMA, a non-invasive measurement of joint movement is enabled. We evaluated the precision CTMA in measuring early cup migration. Standard marker-based radiostereometric (RSA) was as reference. hypothesised that an alternative RSA assessing micromotions.Patients methods: included 30 patients undergoing total hip arthroplasty (THA). Acetabular...

Background Earlier results with porous tantalum acetabular cups in revision THA generally have been favorable. Recently there has some evidence presented that might decrease the risk of rerevision setting hip surgery performed owing to prosthetic joint infection (PJI). As data supporting this assertion come from a study limited population, examining issue large registry approach may be enlightening. Questions/purposes By combining two large, national registries, we asked: (1) Do show...