Failure of Total Hip Arthroplasty due to Delamination and Wear of Titanium Nitride-coated Titanium Heads: A Case Series.

Introduction: We present the case studies of three patients requiring revision for premature failure of total hip arthroplasty (THA).

Case Report: All patients received titanium nitride (TiN)-coated heads made of titanium alloy TiALV as part of their index total hip replacements. At the time of revision surgery, intraoperative findings included partial or complete delamination of the TiN head coating and wear/deformation of the TiALV heads.

Contributions to Unsupervised Online Misalignment Detection and Bumper Error Compensation for Automotive Radar.

One of the fundamental sensors utilized in the Advanced Driver Assist System (ADAS) is the radar sensor. Automotive-related functions need highly precise detection and range of traffic and surroundings; otherwise, the whole ADAS performance suffers. The radar placement beneath a bumper or a cover, the age or exposure to accidents or vehicle vibration, vehicle integration, and mounting tolerances will impact the angular performance of the radar sensor.

Cementless total hip arthroplasty with anatomic-shaped implants. Does the minimal invasive anterolateral technique influence the stem position or subsidence in contrast to the standard lateral approach?

Introduction: Using cementless stems in total hip arthroplasty (THA) has revealed variable results. The risk for early aseptic loosening has been associated to certain surgical approaches and implant designs. This study determines misalignment of collared/collarless stems and the rate of subsidence using the anterolateral approach (ALA) compared to implantations via the direct lateral approach (DLA).

One-Stage Implant-Retaining Revision for Simultaneous Bilateral Infected Total Knee Arthroplasty: A Report of a Rare Case.

There is little information on the management of simultaneous infected total knee arthroplasties in the same patient. Although general principles of management for periprosthetic joint infection apply, there might be certain aspects worth to be considered. We present a case of a 78-year-old patient, who was referred in preseptic conditions 10 years following bilateral TKA.

Impact of continuous passive motion on rehabilitation following total knee arthroplasty.

Background And Purpose: There is an ongoing controversy in respect of the usage of continuous passive motion (CPM) following total knee arthroplasty (TKA). We analysed the impact of CPM on the early rehabilitation after TKA and the clinical outcome over the time.

Methods: Forty patients were prospectively randomized to postoperative protocols following TKA.

Total hip arthroplasty and lumbar spine disorders: Plain co-existence or mutual influence?

Lumbar spine disorders (LSD) might influence the outcome after total hip arthroplasty (THA). Despite a known common prevalence of LSD and degenerative hip disorders, this study investigates their mutual influence in case of co-existence with the purpose to advance surgeons planning and patient's prognosis. Patients with and without LSD were compared before and at the one-year postoperative examination.

Allogenic bone graft for femoral defect augmentation in hip revision arthroplasty: A case series.

Cortical bone loss in revision hip arthroplasty requires an adequate stabilization to achieve a durable implant fixation. This case series shall illustrate possible indications for the use of allogenic grafts in revision hip arthroplasty. Twelve patients with femoral bone loss were treated with allografts.

Proceeding from direct lateral to anterolateral approach in total hip arthroplasty: A closer look on radiological and clinical aspects.

Introduction: Since less invasive approaches for total hip arthroplasty (THA) are promoted, our aim was to compare direct lateral (DLA) and anterolateral approach (ALA) under otherwise identical conditions.

Methods: Pre - and postoperative x-rays from 200 propensity matched patients (DLA vs. ALA) were evaluated for anatomical reconstruction.

Osteointegrative Sleeves for Metaphyseal Defect Augmentation in Revision Total Knee Arthroplasty: Clinical and Radiological 5-Year Follow-Up.

Background: Cementless metaphyseal implant fixation of revision total knee arthroplasty has encouraging early results. We analyzed midterm results and implant survival of osteointegrative augments in Anderson Orthopedic Research Institute (AORI) type 2a, 2b, and 3 defects. Reasons for implant failure were explored and the potential for anatomic joint line reconstruction evaluated.

Hip Arthroplasty in Obese Patients: Rising Prevalence-Standard Procedures?

We examined our experience and, in particular, complications associated with total hip arthroplasty in obese and morbidly obese patients. We prospectively gathered 50 patients in a matched control series including 25 obese and morbidly obese patients. All patients were operated using the direct lateral approach and standard postoperative protocols.

The twenty to twenty-five-year outcomes of the Harris design-2 matte-finished cemented total hip replacement. A concise follow-up of a previous report.

Unlabelled: We previously reported the ten to fifteen-year results for 195 matte-finished Harris Design-2 total hip replacements that had been inserted with cement by two surgeons in 166 patients with osteoarthritis. The purpose of the present report is to update that study and report the twenty to twenty-five-year outcomes. The patients were followed prospectively on the basis of clinical assessment with use of the Harris hip score and radiographic analysis.

Screening for arthrofibrosis after anterior cruciate ligament reconstruction: analysis of association with human leukocyte antigen.

Purpose: Arthrofibrosis represents a severe complication of trauma and reconstructive joint surgery because of generalized connective tissue proliferation resulting in painful joint stiffness. It often appears stereotypical in terms of its clinical and pathologic features, comprising excess deposition of extracellular matrix proteins such as collagen type I, III, and VI and proliferation of fibroblasts. However, trauma and surgery around joints does not always lead to fibrosis, suggesting a genetic predisposition.

Cyclic mechanical strain induces NO production in human patellar tendon fibroblasts--a possible role for remodelling and pathological transformation.

The mechanism by which tendon fibroblasts can detect strain forces and respond to them is fairly unknown. Nitric oxide (NO) is a messenger molecule that among others can respond to shear stress in endothelial cells. Therefore, it was investigated whether cyclic mechanical strain induces NO in vitro in human patellar tendon fibroblasts.

Cyclic mechanical stretching of human patellar tendon fibroblasts: activation of JNK and modulation of apoptosis.

Accelerated rehabilitation after tendon, ligament and bone injuries is widely accepted to avoid adverse effects of immobilization. However, progressive rehabilitation may also lead to an excessive inflammatory soft tissue response and often leads to structural and functional problems such as excessive scarring. The equivalent at the molecular/cellular level is in part the regulation of the sensitive homeostasis between proliferation and apoptosis.