UNLABELLED Early periprosthetic osteolysis following total hip replacement (THR) as a result of septic etiology has been well understood. Periprosthetic bone loss as a result of metastatic infiltration is an uncommon and infrequent cause of early, progressive loosening of joint replacement prosthesis. Proximal femur has been the most common site of involvement compared to acetabular prosthesis....

The TNK ankle is a total ankle prosthesis which was first used in clinical settings in 1980, and which has been used in Japan for more than 30 years. The TNK ankle is only major model made from alumina ceramic materials, and is a 2-component type prosthesis with semi-constrained sliding surfaces. Due to various improvements in the surfaces in contact with the bone, the TNK ankle has consistentl...

INTRODUCTION Total knee arthroplasty is a well-established procedure with gratifying results. There is no consensus in the literature whether to routinely resurface the patella while performing total knee arthroplasty or not. Although an extremely rare occurrence in clinical practice, patellar prosthesis dislocation is a possible complication resulting from total knee arthroplasty. CASE PRESE...

and The National Graduate School for Biomaterials and Tissue Engineering ACADEMIC DISSERTATION To be publicly discussed with the permission of the Medical Faculty of the University of Helsinki, in the large lecture hall (Iso luentosali) Work hard and try your best! If you then fail I am not angry.-my father-This thesis is based on the following original publications. They are referred to in the...

The management and outcome of treatment in 42 patients (49 shoulders) with an infected shoulder prosthesis was reviewed in a retrospective multicentre study of 2343 prostheses. The factors which were analysed included the primary diagnosis, the delay between the diagnosis of infection and treatment and the type of treatment. Treatment was considered to be successful in 30 patients (71%). Previo...

PURPOSE OF STUDY Diagnosis of prosthetic loosening in hip and knee arthroplasty remains a challenge. Although there are a number of diagnostic tools, no single test or combination is 100% sensitive or specific. There has been a recent interest in the use of radionuclide arthrography (RNA) for detection of prosthetic loosening. METHODS A retrospective review of 45 consecutive RNA scans from 20...

Since the first wrist implant in 1890 by Glück in the form of an ivory prosthesis, the evolution of the prosthetic wrist has been sawtoothing. Abandoned in the late nineteenth century due to infectious complications, they reappeared after the Second World War. Several concepts have rubbed shoulders for decades. It flourished simple and lightweight silicone implants Swanson and complex and heavy...

We reviewed the results of 545 consecutive total hip replacements using a cementless non-coated high-density polyethylene acetabular component combined with a cemented Müller stem at five to 10 years. In all, 421 patients (445 hips) were available for review, 118 by questionnaire and 303 by examination and radiography. Of these, 86% had a good or excellent result. We found a high rate of radiol...

We have made a retrospective study of 1001 custom-made prostheses used as replacements after surgery for bone tumours. There were 493 distal femoral, 263 proximal femoral and 245 proximal tibial prostheses. Aseptic loosening was shown to be the principal mode of failure of the implants, and 71 patients had revision for aseptic loosening of a cemented intramedullary stem. The probability of a pa...

Aseptic loosening of a permanent prosthesis remains one the most common reasons for bone implant failure. To improve fixation between and tissue as well enhance blood vessel formation, bioactive agents are incorporated into surface biomaterial. This study reviews compares five elements (copper, magnesium, silicon, strontium, zinc) with respect to their effect on angiogenic behavior endothelial ...