To date, reports of surgical treatment of spontaneous osteonecrosis of the knee (SPONK) refractory to non-operative treatment have primarily focused on knee arthroplasty. This report presents an overview of the characteristics of SPONK and reports our experience with joint-preserving surgical treatment of this condition. Fifteen patients who had joint-preserving surgery ...

BACKGROUND: Minimal invasion surgery (MIS) is a recent technique recommended for Total knee arthroplasty (TKA) but demands an effort of the surgeons and the learning curve may be long. METHODS: Twenty six MIS-TKA were matched to 36 standard TKA with respect to age, sex, body mass index or preoperative score. ...

OBJECTIVES: We evaluated short-term results of the Oxford phase 3 unicompartmental knee arthroplasty (UKA) in patients with medial compartment arthritis. METHODS: The study included 38 patients (28 females, 10 males; mean age 67 years; range 56 to 75 years) who underwent UKA for isolated medial knee osteoarthritis. At the time ...

After total knee arthroplasty (TKA) only 75-89% of patients are satisfied. Because patient satisfaction is a prime goal of all orthopaedic procedures, optimization of patient satisfaction is of major importance. Factors related to patient satisfaction after TKA have been explored, but no studies have included two potentially relevant factors, i.e. ...

INTRODUCTION: The Spanish Ministry of Health commissioned the Galician Agency for Health Technology Assessment to monitor and follow-up Autologous Chondrocyte Implantation (ACI) used to treat chondral lesions of the knee in Spain. The objective of this monitoring was to assess efficacy and safety of the technique. DESIGN: One-hundred and eleven ...

BACKGROUND: Patients undergoing total knee replacements constitute a suitable population to study the natural history of traumatic joint injuries. MATERIAL AND METHODS: We studied all the patients who received a TKA (Total knee arthroplasty) over the course of one year, in five different centers. The study included 474 patients who ...

Between May 1998 and May 2007 we carried out 50 Avon patellofemoral joint replacements in 32 patients with isolated patellofemoral osteoarthritis. There were no revisions in the first five years, giving a cumulative survival of 100% for those with a minimum follow-up of five years. The mean follow-up was 5.3 ...

Revision total knee arthroplasty in patients with rheumatoid arthritis can be challenging. We asked whether we could confirm previously reported high failure rates following revision total knee arthroplasty in patients with rheumatoid arthritis. We therefore determined the Knee Society knee score and function scores, radiographic evidence of failure, and overall ...

OBJECTIVES: Conservative treatment should be tried prior to surgical treatment in knee osteoarthritis. This study was designed to evaluate the short-term effects of mud-pack therapy on pain relief and functional improvement in knee osteoarthritis in comparison with intra-articular hyaluronic acid injections. METHODS: The study included 23 patients who were diagnosed ...

This prospective, randomized study compares functional outcomes between a novel support device (Secure Tracks™) and a standard walker following unilateral total knee replacement. Thirty patients were randomized for the study; 15 walker patients (70.7 ± 6.4 yrs) and 15 Secure Track patients (68.2 ± 6.7 yrs) (p=0.31). Total distance walked ...

OBJECTIVES: The aim of this study was to evaluate the early results of total knee arthroplasty (TKA) performed through the midvastus approach. METHODS: This retrospective study included 48 knees of 42 patients (29 females, 13 males; mean age 69 years; range 54 to 82 years) who underwent TKA for grade ...

This study is to compare, in patients suffering of knee joint disorder, the effects of intra-articular injection of Sodium Hyaluronate, and those of a treatment aiming at the improvement of the emotional status carried out by means of a Radio Electric Device (REAC). 30 subjects were divided into two groups: ...

Although the rates of perioperative morbidity and mortality with simultaneous bilateral total knee arthroplasty remain a concern, multiple studies have shown the procedure to be safe in selected patient populations. Evidence also remains mixed regarding the outcomes of total knee arthroplasty in obese patients. The purpose of this paper is ...

Although the numbers of total knee arthroplasty (TKA) are increasing, there is only a small number of studies investigating driving safety after TKA. The parameter 'Brake Response Time (BRT)' is one of the most important criteria for driving safety and was therefore chosen for investigation.The present study was conducted to ...

BACKGROUND: The aim of this study was to develop, from patients' characteristics and radiography, a formula reflecting the decision for total knee arthroplasty (TKA) in patients with a painful osteoarthritic knee. METHODS: We reviewed medical records of 193 consecutive patients who had knee osteoarthritis and underwent primary TKA surgery and ...

High tibial osteotomy (HTO) is a well established technique for the treatment of medial osteoarthritis of the knee with varus malalignment. Results of total knee arthroplasty (TKA) after previous HTO are still discussed controversially. The aim of this study was to elucidate the clinical and radiological results as well as ...

Pentosan polysulfate sodium (pentosan) is a semi-synthetic drug manufactured from beech-wood hemicellulose by sulfate esterification of the xylopyranose hydroxyl groups. From in vitro and animal model studies, pentosan has been proposed as a disease modifying osteoarthritis drug (DMOAD). The objective of this study was to assess the efficacy, safety, and ...

BACKGROUND: The International Knee Documentation Committee Subjective Knee Form (IKDC SKF) is a patient-reported knee-specific outcome measure that has been shown to be a reliable, valid, and responsive measure for patients with a variety of knee conditions. Further testing is required to compare the reliability and responsiveness of the IKDC ...

BACKGROUND: Patients with focal cartilage defects in the knee may suffer from both pain and functional impairment. Treatment options are often insufficient. It is not known, however, to what extent their complaints affect quality of life, compared with other knee disorders. Knee Injury and Osteoarthritis Outcome Score (KOOS) is a ...

While joint arthroplasty improves the functional ability of persons with severe knee osteoarthritis (OA), the long-term effects of surgical intervention on body mass have not been evaluated. The objective of this study was to determine if a reduction in body mass index (BMI) was present following unilateral total knee arthroplasty ...

The limited availability of fresh osteochondral allograft tissues necessitates the use of banking for long-term storage. A vitrification solution containing a 55% cryoprotectant formulation, VS55, previously studied using rabbit articular cartilage, was evaluated using porcine articular cartilage. Specimens ranging from 2 to 6 mm in thickness were obtained from 6mm ...

The purpose is to identify whether the position of the tibial component in relation to the anatomical axis affects the postoperative mechanical axis in total knee arthroplasty for Korean patients. Preoperatively, 30 patients with varus deformity lesser than 10° were classified as group A, and 30 patients greater than 10° ...

This prospectively blinded randomized controlled study evaluated the difference in the functional and radiological outcomes in patients who received a press-fit condylar Sigma cemented cruciate-substituting total knee arthroplasty with either a rotating platform (RP) or a fixed bearing (FB). There were 51 joints in 49 patients: 24 joints in the ...

INTRODUCTION: The aim of this study was to assess the proprioception of the partial meniscectomized knee and to assess if there is an effect on the knee proprioception. MATERIALS AND METHODS: We performed a case-control study involving patients with meniscus tear at the posterior horn of medial meniscus. Group 1 ...

BACKGROUND: Functional recovery of patients after a total knee arthroplasty (TKA) usually is measured with questionnaires. However, these self-report measures assess the patient's perspective on his or her ability to perform a task. Performance-based tests are needed to assess the patient's actual ability to perform a task. OBJECTIVE: The main ...

BACKGROUND: Autologous chondrocyte implantation (ACI) is frequently used to treat symptomatic defects of the articular cartilage. PURPOSE: To test whether matrix-associated autologous chondrocyte implantation or the original periosteal flap technique provides superior outcomes in terms of clinical efficacy and safety. STUDY DESIGN: Randomized controlled trial; Level of evidence, 2. METHODS: ...

Juvenile idiopathic arthritis (JIA) is a disabling and destructive condition that commonly affects the knee during childhood. Our study aimed to look at the outcome of knee replacement in this uncommon group, set a benchmark for survival and determine predictors of functional results. Patients were identified from a regional specialist ...

BACKGROUND: Total knee arthroplasty (TKA) has been shown to be an effective surgical intervention for people with end-stage knee osteoarthritis. However, recovery of function is variable, and not all people have successful outcomes. OBJECTIVE: The aim of this study was to discern which early postoperative functional measures could predict functional ...

Unicondylar knee arthroplasty (UKA) is argued to be a conservative procedure which permits a later total knee arthroplasty (TKA) should it be required. The aims of the study were to assess the modes of early failure of UKA and see whether the conversion to TKA improved the functional scores, range ...

The range of motion of the knee joint after Total Knee Replacement (TKR) is a factor of great importance that determines the postoperative function of patients. Much enthusiasm has been recently directed towards the posterior condylar offset with some authors reporting increasing postoperative knee flexion with increasing posterior condylar offset ...

BACKGROUND: Treatment with repeated cycles of Intra-Articular Sodium Hyaluronate (IA-HA), from previous study, can improve symptoms and delay surgical interventions in knee osteoarthritis patients who failed conservative treatment within minimum 2-years follow-up. This is a continued study to follow-up responded patients in the mentioned study whether continuing treatment with IA-HA ...

We present a prospective review of the two-year functional outcome of 37 Avon patellofemoral joint replacements carried out in 29 patients with a mean age of 66 years (30 to 82) between October 2002 and March 2007. No patients were lost to follow-up. This is the first independent assessment of ...

BACKGROUND: Despite the increase in the number of total knee arthroplasty revisions, outcomes of such surgery and their correlates are poorly understood. The aim of this study was to characterize patterns of functional improvement after revision total knee arthroplasty over a two-year period and to investigate factors that affect such ...

OBJECTIVE: To examine the clinical outcome of minisubvastus approach, a true quadriceps-sparing approach for minimally invasive knee arthroplasty. MATERIAL AND METHOD: Between January 2005 and January 2008, 398 knees were included in this study. We evaluated the results of primary total knee arthroplasties performed with minisubvastus approach in patients at ...

The goal of this study was to compare outcomes during postoperative rehabilitation between individuals who delayed surgery to those who did not delay surgery. Forty-two patients who underwent unilateral total knee replacement (TKR) were categorized into 2 groups: early surgical (n=30, surgery 324 days prior) and late surgical (n=12, surgery ...

OBJECTIVE: To compare the blood loss after minimally invasive surgery total knee arthroplasty (MIS-TKA) between the procedures performed with and without electromagnetic computer navigation. MATERIAL AND METHOD: Eighty patients were recruited for a cohort study of the minimally invasive surgery total knee arthroplasty (MIS-TKA) for the treatment of osteoarthritis. They ...

The aim of this prospective study was to assess the range of motion (ROM) achieved with the Genesis II Posterior Stabilized High Flexion knee prosthesis. The ROM was compared with that of a historical study group with the standard PS insert and an identical study design. Sixty three patients with ...

Many components of a surgeon's total knee arthroplasty (TKA) treatment regimen affect the rate of recovery, such as patient selection, preoperative education, surgical technique, pain management, and postoperative rehabilitation. Therefore, accurate counseling requires that the surgeon quantifies patient expectations and early recovery of the treatment regimen with a method that ...

Osteoarthritis becomes more prevalent with increasing age, and currently is occurring more frequently in the "baby boomer" generation (ages 44-66 years). However, many individuals may be reluctant to undergo arthroplasty procedures because potential activity limitations. Thus, physicians must consider each patient's history and desired activity level after treatment. Osteoarthritis treatments ...

BACKGROUND: Mini-incision subvastus approach is soft tissue preservation of the knee. Advantages of the mini-incision subvastus approach included reduced blood loss, reduced pain, self rehabilitation and faster recovery. However, the improved visualization, component alignment, and more blood preservation have been debatable to achieve the better outcome and preventing early failure ...

STUDY DESIGN: Clinical measurement. OBJECTIVE: To determine the interrater reliability of a knee joint effusion grading scale in an outpatient orthopaedic physical therapy clinic. BACKGROUND: Knee joint effusion may indicate joint inflammation or irritation. Therefore, objective monitoring of effusion is important to decision making regarding patient prognosis and program progression. ...

OBJECTIVE: To compare the clinical outcomes of minimally invasive total knee arthroplasty (MIS TKA) with and without computer assisted surgery (CAS). MATERIAL AND METHOD: From September 2007 to February 2008, 64 patients (70 knees) underwent MIS TKA were included. Clinical data such as operative time, pain score, total blood loss ...

PURPOSE: To compare outcomes of total knee arthroplasty (TKA) in English- versus non-English-speaking patients. METHODS: 193 women and 85 men (mean age, 72 years) underwent 117 left and 161 right primary TKAs. 237 and 41 patients were English and non-English speaking, respectively. Interpretation was provided. Pre- and post-operative functional outcomes ...

While options for operative treatment of leg axis varus malalignment in patients with medial gonarthrosis include several established procedures, such as unicompartmental knee arthroplasty (UKA), total knee arthroplasty (TKA) or high tibial osteotomy (HTO), there has been little focus on a less invasive option introduced more recently: the UniSpacer™ implant, ...

This study was conducted to longitudinally compare a new floating platform mobile-bearing (MB) prosthesis with an established fixed-bearing (FB) system with respect to early clinical outcomes in patients with bilateral TKAs using the MB prosthesis in one knee and the FB prosthesis in the other. Clinical outcomes (ROM, AKS and ...

This study reports the incidence and proposes a probable cause of flexion deformity and extensor weakness following lengthening of quadriceps tendon for the congenital dislocation of the knee and also proposes a modification of the functional grading given in the literature to this effect. Seventeen knees in ten patients were ...

BACKGROUND: Despite the many studies on chondral injury repair, no outcomes have been evaluated with the Western Ontario and McMaster (WOMAC) Universities osteoarthritis index, the Knee Injury and Osteoarthritis Outcome Score (KOOS), and the Oxford Knee Score, all of which are specific for evaluating the presence of osteoarthritis. MATERIALS AND ...

The aim of this study was to determine whether there is a difference in functional outcome between the PFC Sigma fixed-bearing and rotating-platform total knee replacement systems. One hundred twenty patients were randomised to receive either a fixed-bearing or rotating-platform PFC Sigma total knee replacement. Range of movement (ROM), Oxford ...

INTRODUCTION: The present prospective multicenter study sought to analyze immediate and short-term (6 months) course following lateral meniscus lesion surgery. MATERIAL AND METHODS: Between 2007 and 2008, 104 lateral meniscus lesions on stable knee were recruited prospectively in 10 centers. Lesion type and topography were recorded and patients were assessed ...

Safety and efficacy of unicompartmental knee arthroplasty (UKA) has been shown in large patient series. Patellofemoral replacement (PFR) is known to be a viable solution to end-stage patellofemoral arthritis. Bicompartmental osteoarthritis (OA) affecting the medial tibio-femoral and the patello-femoral compartment (medio-patellofemoral OA) is often treated with total knee arthroplasty (TKA). ...