The treatment of rotator cuff arthropathy is still a matter of debate. Up to now a hemiarthroplasty was usually used. We report the results obtained with a reversed shoulder prosthesis (Delta prosthesis, De Puy) in seven patients with severe rotator cuff arthropathy. The mean Constant score increased from 17.9/100 preoperatively to 56.7/100 postoperatively. The mean follow-up was 16 months. Loo...

Jansen JA, Smit F, Pereira Arias-Bouda LM. The role of nuclear medicine techniques in differentiation between septic and aseptic loosening of total hip and knee arthroplasty. This article gives an overview of nuclear imaging techniques, which can be used to diagnose (a)septic loosening in joint replacements. The pathophysiology of loosening and the differences between septic and aseptic looseni...

PURPOSE This study examined the effects of the abutment types and dynamic loading on the stability of implant prostheses with three types of implant abutments prepared using different fabrication methods by measuring removal torque both before and after dynamic loading. MATERIALS AND METHODS Three groups of abutments were produced using different types of fabrication methods; stock abutment, ...

Purpose To evaluate clinical and radiological outcome of the full cementation technique in revision total knee arthroplasty (TKA) using a constrained condylar knee (CCK) prosthesis. Materials and Methods Between January 2008 and March 2012, 18 cases (16 patients) of fully cemented revision TKA were performed using a CCK prosthesis. Fifteen cases of aseptic loosening (13 patients) and 3 cases ...

Joint replacements may fail due to infection, dislocation, peri-prosthetic fracture and loosening. Between 0.4 and 4% of joint replacements are known to be complicated by infection and aseptic loosening 2-18%. Differentiating between infection and aseptic loosening has an important bearing on the ongoing strategy for antimicrobial therapy and surgical intervention, but distinguishing one from t...

BACKGROUND Late-onset chronic (low-grade) periprosthetic joint infections are often accompanied by unspecific symptoms, false-negative cultures or nonspecific low values of serum biomarkers. This may lead to the unintended implantation of a revision prosthesis into an infected surgical site with the risk of short-term failure developing again. Conversely, false diagnosis of joint infection may ...

Diagnosing orthopedic infection with or without the presence of prosthesis (mainly hip and knee) remains today, very delicate. Primarily, the difficulty of differential diagnosis between aseptic loosening and mechanical septic loosening of a prosthesis follows from the inherently indolent infection. Diagnosis inadequate, late or inadequate treatment of a bad initial diagnosis, may be the cause ...

Fifty-seven cemented total hip arthroplasties (THAs) were reviewed in cases of osteoarthrosis secondary to congenital dysplasia or dislocation. The bearing surface of the prosthesis used in this series consists of a polyethylene acetabular component on an alumina ceramic head. All acetabular components were positioned at the same level as the original acetabulum, and an autologous femoral head ...

The Souter-Strathclyde unconstrained elbow prosthesis was prospectively studied in 36 patients (45 prostheses) with rheumatoid arthritis (Larsen grade 4 and grade 5). The mean age of the patients at the time of operation was 63 years (range: 39 to 75 years). Eight patients (9 prostheses) died within five years of implantation, from causes unrelated to the elbow arthroplasty. One patient was los...

Tissular reaction to orthopedic implants has been thoroughly studied, since it can be responsible for invalidating pain, as well as for implant loosening, thus requiring implant removal (which, otherwise, has no specific indications). The reaction is enhanced by certain characteristics of the host, such as age, comorbidities, as well as co-existence of different implants. We present the case of...