A system for grading articular cartilage lesions at arthroscopy

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Abstract
Although there are several different classification sys tems for the description of articular cartilage damage, each has certain limitations and deficiencies which can lead to confusion. We are proposing a new system which describes articular cartilage abnormalities in sim ple terms. It is based on four separate and distinct variables: the description of the articular surface, the extent (depth) of involvement, the diameter of the le sion, and the location of the lesion. Although somewhat qualitative and subjective, the system enables the sur geon to record observed articular cartilage changes. We have used this grading as part of our overall knee rating system and have found it helpful in comparing treatment results between our different studies. For research purposes, a point scaling system facilitates computerization and statistical analysis of the data.

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