Abstracts Posters SICOT-SOF meeting Gothenburg 2010 _2_

Poster
Topic: Sports Medicine - Knee
Abstract number: 26016
IS RADIOGRAPHIC MEASUREMENTS OF BONY LANDMARK FOR MENISCAL
SIZING RELIABLE?
Jung-Ro YOON 1 , Jae-Hyuk YANG 1 , Hyung-Tae LIM 1 , Sung-Jong LEE 2
1 Department of Orthopaedic Surgery, Seoul Veterans Hospital, Seoul (KOREA),
2 Teun-Teun Orthopaedic surgery, In cheon (KOREA)
The radiologic measurement of meniscal width is widely accepted but the
conventional method of measuring the length is controversized. The purpose of this
study was to develop and validate the radiographic measuring method of determining
the needed size of a lateral meniscal allograft. We studied forty samples of fresh
lateral meniscus which was obtained during total knee arthroplasty. The sample was
obtained carefully without injurring the meniscus itself and the bony attachment sites.
The patient inclusion criteria was mild to moderate genu varum osteoarthritis patients
with mechanical axis deviation of less than 15 degrees. On the radiographs, lateral
tibial width and the distance from anterior tibia border to the posterior lateral plateau
was measured using the author’ protocol. Linear regression analysis was used to
calculate expected meniscal dimensions from each specimen’ plateau dimensions.
The width and length of anatomic measurements were 26.8±2.96 and 36.6±6.10
respectively. The width and length of radiologic measurements were 29.24±2.81 and
48.08±5.64 respectively. Linear regression analysis showed the relation of the length
to be anatomic=radiologicx0.7. The absolute difference of width and length were
1.95±1.43 and 2.75±2.05 respectively. Using specific medial and lateral tibial plateau
width and length measurements, meniscal dimensions could be predicted with a
mean error of only 5.0±5.4%. The results suggest that lateral meniscal dimensions
can be predicted accurately from radiographic tibial plateau measurements, with only
small mean errors.
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