Anterior femoral offset is a flawed measurement of patellofemoral overstuffing.

Background: Patellofemoral joint (PFJ) issues after total knee arthroplasty (TKA) are becoming a topic of interest once again. Due to the complex three-dimensional shape of the trochlea, various two-dimensional proxy measurements on plain X-rays have been described. One of these measurements is the anterior femoral offset (AFO).

Significant Difference in Antimicrobial Resistance of Coagulase Negative Periprosthetic Joint Infection in Septic Revision Total Knee Arthroplasty Between Two Major Orthopedic Centers.

Background: Antimicrobial resistance is recognized as a major public health threat. It occurs naturally; however, an excessive antibiotic use and misuse of antibiotics accelerate the process. Periprosthetic joint infections (PJI) are becoming harder to treat as the efficacy of antibiotics is becoming lower.

Long-term results of more than 13 years after arthroscopic repair of triangular fibrocartilage complex (TFCC) Palmer 1B tears: a comparison with short- and mid-term results.

Purpose: Goal of this study was the assessment of long-term outcome of arthroscopically assisted repair of Palmer 1B/Atzei 1 triangular fibrocartilage complex tears and the comparison with short- and mid-term results.

Methods: The study included nineteen patients (mean 49.2 years of age) with a mean follow-up time of 13.

Development of antibiotic resistance in periprosthetic joint infection after total knee arthroplasty.

Aims: The management of periprosthetic joint infection (PJI) after total knee arthroplasty (TKA) is challenging. The correct antibiotic management remains elusive due to differences in epidemiology and resistance between countries, and reports in the literature. Before the efficacy of surgical treatment is investigated, it is crucial to analyze the bacterial strains causing PJI, especially for patients in whom no organisms are grown.

Blood loss after revision knee arthroplasty is 1.38- to 2.17-fold higher than after primary knee arthroplasty: A retrospective analysis of 898 cases.

Background: There are a number of factors that influence blood loss during and after primary total knee arthroplasty (TKA) and revision TKA (rTKA). The purpose of this study was to provide a factorial assessment that would aid surgeons in managing expected blood loss in rTKA, when compared to TKA. The first question asked was the blood loss and transfusions between TKA and rTKA and the second question was risk factors for blood loss after rTKA.

Ileus, Gastrointestinal Bleeding and Clostridium difficile Colitis after Hip and Knee Replacement - a Systematic Review.

Introduction: Major gastrointestinal complications after arthroplasty are rare, but can have detrimental effects on the patient and can substantially increase the overall cost of treatment. This systematic review provides an overview of ileus, gastrointestinal bleeding and C. difficile colitis after total hip and knee arthroplasty.

Correlation of tibial component size and rotation with outcomes after total knee arthroplasty.

Introduction: Tibial component design and positioning contribute more to patient satisfaction than previously realized. A surgeon needs to decide on the size and rotation, bearing in mind that coverage should be as high as possible, whilst malrotation and overhang should be avoided. No study investigates the impact of each of these components on clinical outcomes in a single cohort.

Titanium acetabular cementless cups combined with highly crosslinked polyethylene liner have very low rates of aseptic loosening.

Background: There is a clear tendency towards cementless acetabular components in primary total hip arthroplasty.

Objective: The aim of this study was to assess the long-term clinical and radiological outcome of titanium cementless acetabular cups when combined with a highly crosslinked polyethylene liner.

Methods: This study is a retrospective follow-up of 67 cups in 64 patients.

Short stems have lower load at failure than double-wedged stems in a cadaveric cementless fracture model.

Objectives: Periprosthetic femoral fractures (PFFs) have a higher incidence with cementless stems. The highest incidence among various cementless stem types was observed with double-wedged stems. Short stems have been introduced as a bone-preserving alternative with a higher incidence of PFF in some studies.

Analysis of acetabular version: Retroversion prevalence, age, side and gender correlations.

Introduction: Studies using conventional radiographical signs and computerized tomography (CT) for retroversion of the acetabulum have reported a prevalence of up to 25%. The purpose of this study was to provide a detailed report on acetabular version, gender, age and side differences in a large cohort.

Materials And Methods: A total of 404 patients receiving a whole-body CT scan, aged between 16 and 40 years, have been included in the study.

Cementing of the hip arthroplasty stem increases load-to-failure force: a cadaveric study.

Background and purpose - To date, there is not a single clinical or mechanical study directly comparing a cemented and a cementless version of the same stem. We investigated the load-to-failure force of a cementless and a cemented version of a double tapered stem. Material and methods - 10 femurs from 5 human cadaveric specimens, mean age 74 years (68-79) were extracted.

Are Serum Metal Ion Levels a Concern at Mid-term Followup of Revision Knee Arthroplasty With a Metal-on-metal Hinge Design?

Background: Elevated serum levels of chromium and cobalt ions in metal-on-metal (MoM) bearing surfaces is a well-known phenomenon in THA. However, few studies have addressed this issue in complex primary and revision knee arthroplasty using a MoM hinged mechanism, and no study, to our knowledge, has investigated knees with MoM hinges in patients without megaprostheses (tumor prostheses).

Questions/purposes: We analyzed a series of patients who received MoM hinged revision knee prostheses and asked: (1) What are the serum metal ion levels at short-term followup? (2) Is there any correlation between metal ion levels and the Knee Society Score (KSS) at this followup?

Methods: Between 2013 and 2017, we performed 198 revision knee arthroplasties, of which 32 (17.

The prevalence of a prominent anterior inferior iliac spine.

Introduction: Impingement of the prominent anterior inferior iliac spine (AIIS) against the femoral neck has recently been described as another type of impingement. The purpose of this study is to provide a distribution of AIIS types using the classification proposed by Hetsroni and thus report on the prevalence of prominent types.

Materials And Methods: A total of 400 patients were included in the study with an average age 27.

Complications after direct anterior versus Watson-Jones approach in total hip arthroplasty: results from a matched pair analysis on 1408 patients.

Background: The direct anterior approach (DAA) has gained popularity in total hip arthroplasty (THA) over the past decade. A large number of studies have compared the DAA to other approaches with inclusion of a learning curve phase. The aim of this study was to compare the complication rate and bleeding between the DAA and the anterolateral approach after the learning curve phase.

Risk factors for ileus after hip and knee arthroplasty.

Purpose: Postoperative ileus (POI) is one of the complications that can occur after every surgical procedure including arthroplasty. It can have detrimental consequences for the patient and portrays an economic burden on health care systems. The risk factors for POI after arthroplasty described in the literature are scarce and include hip arthroplasty, male gender and previous abdominal surgery.

COPD as a risk factor of the complications in lower limb arthroplasty: a patient-matched study.

Purpose: A relevant proportion of patients undergoing joint replacement surgery for the treatment of osteoarthritis exhibit COPD. This coincidence may result from an increased prevalence of both the diseases in elderly patients. In this study, COPD, which is known to be associated with a variety of comorbidities, and its potential interactions, eg, mediated via systemic inflammation, are discussed.

Differences in total blood loss and transfusion rate between different indications for shoulder arthroplasty.

Purpose: In this study, the total blood loss, transfusion rate and number of transfused blood units in patients with different indications for shoulder arthroplasty: primary, fracture and secondary were compared. Risk factors for bleeding and transfusion were analysed.

Methods: Medical records and the database of the institution's blood bank from 527 patients that received shoulder arthroplasty were analysed retrospectively.

Ten-year follow-up of a cemented tapered stem.

Introduction: This stem was cleared by the FDA in 2002 and has been implanted in cementless and cemented versions. Despite its long history, there are no long-term clinical  results available for the cemented version of this implant. The aim of this study was to provide such data.

Biomechanical and microbiological effects of local vancomycin in anterior cruciate ligament (ACL) reconstruction: a porcine tendon model.

Introduction: Although there is increasing evidence for the successful use of local vancomycin applied by soaked compresses during ACL reconstruction, there are still little data on its microbiological and biomechanical effects. Furthermore, exact dosage of vancomycin with respect to tendon stability and microbiological effectivity is still unknown.

Materials And Methods: 63 porcine flexor digitorum profundus tendons were harvested under sterile conditions from fresh cadaver legs.

Transfusions increase complications and infections after hip and knee arthroplasty: An analysis of 2760 cases.

Background: Knee and hip replacement surgery are still the mainstay therapy for osteoarthritis. In spite of the improvement of techniques and implants, anemia is a relatively common complication, with transfusion rates of up to 23% in some centers.

Objective: The purpose of the study was to determine a correlation of transfusions to complications including infection since this topic is still being debated or even disputed in the literature.

The effect of surgeon's learning curve: complications and outcome after hip arthroscopy.

Introduction: The aim of the present study was to determine the incidence and type of complications during and after hip arthroscopy as well as the effect of the surgeon's learning curve on the occurrence of complications. We expect that the currently reported prevalence especially of minor complications is likely to be underreported in most retrospective series based on chart analysis.

Materials And Methods: The study included all consecutive patients who underwent hip arthroscopy between 2006 and 2014 at a minimum follow-up of 6 weeks starting with the first patient undergoing hip arthroscopy at the institution.

Patient-specific instruments' routine use over conventional total knee arthroplasty remains inconclusive: Analysis of 961 cases.

Background: An increasing demand for total knee arthroplasty (TKA) has pushed innovations in the industry and created a promising new technique called patient specific instruments (PSI). Early reports had promising results such as reducing operative time, cost, and improved alignment. More recent reports are conflicting.