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BACKGROUND New methods have been used, with promising results, to treat full-thickness cartilage defects. The objective of the present study was to compare autologous chondrocyte implantation with microfracture in a randomized trial. We are not aware of any previous randomized studies comparing these methods. METHODS Eighty patients without general(More)
BACKGROUND The optimal treatment for cartilage lesions has not yet been established. The objective of this randomized trial was to compare autologous chondrocyte implantation with microfracture. This paper represents an update, with presentation of the clinical results at five years. METHODS Eighty patients who had a single chronic symptomatic cartilage(More)
STUDY DESIGN A comprehensive immunohistochemical study of matrix metalloproteinase activity in discs from patients with different disc diseases. OBJECTIVES To identify individual matrix metalloproteinase enzymes that could contribute to the degeneration of the matrix of the intervertebral disc, to identify the cells that produce matrix metalloproteinases(More)
The intervertebral disc is a cartilaginous structure that resembles articular cartilage in its biochemistry, but morphologically it is clearly different. It shows degenerative and ageing changes earlier than does any other connective tissue in the body. It is believed to be important clinically because there is an association of disc degeneration with back(More)
The intervertebral disc is a highly organized matrix laid down by relatively few cells in a specific manner. The central gelatinous nucleus pulposus is contained within the more collagenous anulus fibrosus laterally and the cartilage end plates inferiorly and superiorly. The anulus consists of concentric rings or lamellae, with fibers in the outer lamellae(More)
Meniscus deficient knees develop early osteoarthritis in the knee. Autologous Chondrocyte Implantation has provided a new dimension to the treatment of chondral defects in the knee, with 85% good to excellent results and a long-term durable outcome of up-to 11 years. However, it is contraindicated in meniscus deficient knees. Allogenic Meniscus(More)
The cartilaginous end-plate is thought to play an important role in the nutrition of the intervertebral disc, and hence may be of significance in the etiology of back pain. The present study describes the biochemical and histologic properties of the end-plate and adjacent tissues in the young human adult lumbar spine. Thus, a datum is established in which(More)
Several types of collagen are known to exist in the intervertebral disc in addition to the fibrillar collagens, Types I and II. Although they constitute only a small percentage of the total collagen content, these minor collagens may have important functions. This study was designed to investigate the presence of Types I, II, III, IV, VI, and IX collagens(More)
STUDY DESIGN Biochemical study of human intervertebral discs collected at surgery from patients with low back pain associated with disc degeneration or scoliosis. Matrix metalloproteinases were studied by quantitative zymography. OBJECTIVE To determine whether changes in the expression of matrix metalloproteinases will bring about tissue remodelling that(More)