Association between varus alignment and post-traumatic osteoarthritis after anterior cruciate ligament injury.

Purpose: To investigate the association between varus alignment and post-traumatic osteoarthritis (OA) after an anterior cruciate ligament (ACL) injury.

Methods: One hundred subjects with an acute complete ACL tear were followed for 15 years. Anterior-posterior radiographs of the tibiofemoral joint were obtained with a knee flexion of 20°, and the patellofemoral joint was examined with skyline view at 50° knee flexion.

Differences in the radiological characteristics between post-traumatic and non-traumatic knee osteoarthritis.

Osteoarthritis (OA) of the knee can be defined as primary (non-traumatic) or secondary (post-traumatic). Both non-traumatic OA and post-traumatic OA have been described predominantly in the medial compartment of the knee. The objective of this study was to compare the location of structural radiographic changes in non-traumatic OA and post-traumatic OA.

The acutely ACL injured knee assessed by MRI: are large volume traumatic bone marrow lesions a sign of severe compression injury?

Objectives: To map by magnetic resonance imaging (MRI) and quantitative MRI (qMRI) concomitant fractures and meniscal injuries, and location and volume of traumatic bone marrow lesions (BMLs) in the acutely anterior cruciate ligament (ACL) injured knee. To relate BML location and volume to cortical depression fractures, meniscal injuries and patient characteristics.

Methods: One hundred and twenty-one subjects (26% women, mean age 26 years) with an ACL rupture to a previously un-injured knee were studied using a 1.

Reduced functional performance in the lower extremity predicted radiographic knee osteoarthritis five years later.

Background: Reduced quadriceps strength is an early finding in subjects with knee osteoarthritis, but it is not clear whether it is a cause or a consequence of knee osteoarthritis.

Objective: To determine whether reduced functional performance in the lower extremity predicts the incidence or progression of radiographic knee osteoarthritis.

Design: Prospective, epidemiological, population based cohort study.

Distribution of MR-detected cartilage defects of the patellofemoral joint in chronic knee pain.

Objectives: The aim of the study was to detect cartilage defects and determine the center of these defects in MR imaging of the patellofemoral joint (PFJ) in middle-aged people with chronic knee pain.

Design: In the format of a prospective study of early osteoarthritis (OA), this cross-sectional study of the signal knee (the most painful one at inclusion in the study in 1990) in 59 individuals, 30 women and 29 men (aged 41-58 years, mean 50 years) with chronic knee pain, with or without radiographically determined knee OA, was examined using MR imaging on a 1.0 T imager.

Joint space width of the tibiofemoral and of the patellofemoral joint in chronic knee pain with or without radiographic osteoarthritis: a 2-year follow-up.

Objectives: To assess the interval change of the minimal joint space width (MJS) in radiographs of the tibiofemoral (TF) joint and of the patellofemoral (PF) joint with a 2-year follow-up in middle-aged people with longstanding knee pain with or without radiographic osteoarthritis (OA) and to study the precision of the MJS measurements.

Design: In the format of a prospective study of early OA the signal knee in 55 people, 28 men and 27 women (aged 41-57 years, median 50), with chronic knee pain at inclusion was examined with a 2-year interval (median 25 months, range 21-30). The MJS of the TF joint was measured using a flexed PA view in weightbearing and the MJS of the PF joint using an axial view in standing.

[Hip and knee osteoarthritis. Conventional X-ray best and cheapest diagnostic method].

Osteoarthritis is a multifactorial disease affecting cartilage and subchondral bone. Conventional radiographs are inexpensive and readily available. The hip joint should be examined in weight-bearing with an anteroposterior and a right and left anterior oblique view, rotating the patient 55 degrees in each oblique view.

Magnetic resonance imaging of the knee in chronic knee pain. A 2-year follow-up.

Objective: The aim of the study was to evaluate the change over time of cartilage defects, subchondral lesions and meniscal abnormalities of the knee using magnetic resonance (MR) imaging with a 2-year interval in patients with chronic knee pain.

Design: In the format of a prospective study of early osteoarthritis (OA), the signal knee (most painful at the inclusion in the study 1990) in 47 individuals, 25 women and 22 men (aged 41-57 years, median 50), with chronic knee pain, with or without radiographically determined knee OA, were examined using MR imaging on a 1.0 T imager with a 2-year interval (median 25 months, range 21-30).

Radiography in osteoarthritis of the knee.

Osteoarthritis (OA) is a multifactorial process affecting cartilage and subchondral bone. Conventional radiographs are inexpensive and readily available. The increased knowledge with regard to interpreting weightbearing radiographs of the tibiofemoral joint and axial radiographs of the patellofemoral joint will enable these examinations to remain competitive techniques compared with more expensive and sophisticated methods, such as MR imaging, when investigating knee pain to establish the diagnosis and the severity of OA.

Bone scintigraphy in chronic knee pain: comparison with magnetic resonance imaging.

Objective: To compare increased bone uptake of 99Tcm-MDP and magnetic resonance (MR) detected subchondral lesions, osteophytes, and cartilage defects in the knee in middle aged people with long-standing knee pain.

Methods: Fifty eight people (aged 41-58 years, mean 50) with chronic knee pain, with or without radiographic knee osteoarthritis, were examined with bone scintigraphy. The pattern and the grade of increased bone uptake was assessed.

Correlation between radiographically diagnosed osteophytes and magnetic resonance detected cartilage defects in the tibiofemoral joint.

Objective: To assess the correlation between the presence of radiographically diagnosed osteophytes in the tibiofemoral joint (TFJ) and (1) magnetic resonance (MR) detected cartilage defects and meniscal lesions in the same joint and (2) knee pain.

Methods: Fifty-nine people, 29 men and 30 women, with chronic knee pain (aged 41-58 years, mean 50 years) were examined with posteroanterior weightbearing radiograms in semiflexion of both TFJ. The presence and grade of marginal and central osteophytes were assessed.

Correlation between radiographically diagnosed osteophytes and magnetic resonance detected cartilage defects in the patellofemoral joint.

Objective: To assess the correlation between radiographically diagnosed osteophytes in the axial and lateral view of the patellofemoral joint (PFJ) and (1) magnetic resonance (MR) detected cartilage defects in the same joint and (2) knee pain.

Methods: Fifty-seven people with chronic knee pain, (aged 41-58 years, mean 50 years) were examined with axial and lateral radiograms when standing of the right and the left PFJ. The presence and grade of osteophytes was assessed.

Radiography and bone scintigraphy in osteoarthritis of the knee--comparison with MR imaging.

Purpose: Osteoarthritis (OA) is a multifactorial process affecting cartilage and subchondral bone. Traditionally, plain radiographs and eventually bone scintigraphy are used to establish the diagnosis, whereas MR imaging, as a sensitive instrument for early diagnosis, is less commonly used. Therefore, these methods have been compared in the format of a prospective study of knee OA.

Bone scan and serum markers of bone and cartilage in patients with knee pain and osteoarthritis.

Objective: To study the relations between knee joint abnormalities, reflected by bone scintigraphy and serum concentrations of cartilage oligomeric matrix protein (COMP) and bone sialoprotein (BSP).

Design: In a group of 38 individuals aged 37-54 years with chronic knee pain for more than four years, both knees were investigated with bone scan. The bone scans were graded for the extent of abnormalities.

Joint-space width in the weight-bearing radiogram of the tibiofemoral joint. Should the patient stand on one leg or two?

Purpose: The aim of the study was to compare the minimal joint-space (MJS) width of the tibiofemoral joint (TFJ) in weight-bearing radiograms with the patient in two different positions.

Material And Methods: From a study of 54 patients with chronic knee pain (aged 42-59 years, mean 52 years), we selected 21 consecutive patients for this study. In these 21 patients, both knees were examined by means of p.

Joint-space width in the axial view of the patello-femoral joint. Definitions and comparison with MR imaging.

Purpose: To validate a bony landmark on the dorsal aspect of the patella for measurement of the interbone distance in the axial radiogram of the patello-femoral joint (PFJ); to assess the reproducibility of this radiogram and the minimal joint-space (MJS) width measurements in the medial and lateral compartments of the PFJ in this view; and to relate the MJS of the PFJ to MR-detected cartilage defects in the same joint.

Material And Methods: Fifty-seven individuals with chronic knee pain (aged 41-58 years, mean 50 years) were examined with an axial view of the PFJ in the standing position. The MJS was measured with a mm-graded ruler.

Changes in cartilage and bone metabolism identified by serum markers in early osteoarthritis of the knee joint.

Serum concentrations of two extracellular matrix molecules were determined over a 3 yr period in individuals with chronic knee pain to investigate whether sequential serum measurements of cartilage- and bone-derived molecular fragments reflect early stages of osteoarthritis (OA) of the knee joints. Thirty-eight individuals with chronic knee pain (> 3 months at inclusion) with or without radiographic evidence of knee joint OA at the 3 yr follow-up radiographic examination were studied. Serum concentrations of cartilage oligomeric matrix protein (COMP) and bone sialoprotein (BSP) increased significantly (P < 0.

Postero-anterior radiogram of the knee in weight-bearing and semiflexion. Comparison with MR imaging.

Purpose: The purpose was four-fold: to assess the reproducibility of p.a. weight-bearing radiograms of the knee and the minimal joint-space (MJS) width measurements in these radiograms; to compare the MJS with MR-detected cartilage defects; to evaluate the location of these cartilage defects; and to estimate the relation between meniscal abnormalities and joint-space narrowing.

Radiographic osteoarthritis of the knee classified by the Ahlbäck and Kellgren & Lawrence systems for the tibiofemoral joint in people aged 35-54 years with chronic knee pain.

Objectives: To determine the prevalence of tibiofemoral radiographic knee osteoarthritis (OA) in people aged 35-54 years associated with chronic (> 3 months) knee pain using two different radiographic grading systems.

Methods: Population based postal survey in a random sample of inhabitants in a district in southern Sweden followed by clinical examination and plain posteroanterior, weight bearing radiographical examination. The Ahlbäck criteria (focusing on joint space narrowing) and the Kellgren & Lawrence classification for knee OA were used for diagnosing tibiofemoral OA.

Gadolinium-DTPA-enhanced MR imaging in asymptomatic knees.

Purpose: To evaluate the occurrence and extent of Gd-DTPA-enhanced synovial structures in asymptomatic knee joints of middle-aged healthy individuals.

Material And Methods: MR imaging of the knee joint was performed in 10 healthy subjects aged 40-61 years. The study included a sagittal T1-weighted SE sequence before and after i.

Revision knee arthroplasty in rheumatoid arthritis.

Seventy-six revised total knee arthroplasties (TKAs) performed for mechanical, nonseptic failure of the primary arthroplasty in 62 rheumatoid arthritis patients were investigated. The revisions were performed with McIntosh, Marmor, Attenborough, Guepar, and various types of tricompartmental prostheses. Twenty-one of the 76 revisions subsequently failed.

Total knee replacement in juvenile chronic arthritis.

Twelve patients with juvenile chronic arthritis (JCA) underwent 18 primary knee replacements during 1975-81. Eleven patients were followed for an average of six (3-9) years. Mean age at operation was 25 (18-32) years.