POSTER ABSTRACTS - ISAKOS

purpose of this study was to measure radial
displacement of the torn medial meniscus on MRI
and to clarify its relationship to both the type of
meniscal tear and combined cartilage damage.
MATERIALS & METHODS: From 1999 to 2003, 16
patients with symptomatic isolated medial
meniscal tears underwent preoperative MRI
evaluation and arthroscopic surgery. There were 7
males and 9 females with an average age of 51
years. MR imaging was performed on a 0.4-T unit
(Aperto, Hitachi Medico). For evaluation of radial
displacement, medial displacement index (MDI)
defined as the ratio of meniscal overhang to
meniscal width was caliculated on the midcoronal
view (Kenny C, CORR, 1997). Meniscal tears were
classified into two groups : horizontal or radial
tear at the middle and/or posterior segment in 9
knees (group I) and radial tear at the posterior
horn in 7 knees (group II). ICRS classification was
used for evaluation of the combined cartilage
damage.
RESULTS: MDIs were 0.13±0.13 for group I and
0.49±0.11 for group II. There was statistically
significant difference between two groups
(p