The reproducibility of radiographic measurement of medial meniscus horn position.
OBJECTIVE
The objective of this investigation was to evaluate the possibility of locating and reproducing the tibial insertion areas of the anterior and posterior horns of the medial meniscus on preoperative radiographs according to an established method for the lateral meniscus.


METHODS
In 20 tibia heads, we prepared anterior and posterior horn insertions and marked their circumference with radiopaque steel balls of 1.6 mm in diameter. Standardized anteroposterior and lateral radiographs were made. On these radiographs, different landmarks were defined, their distances measured (tibial width and depth, distance from lateral tibia border to meniscus insertion midpoint, distance from anterior tibia border to meniscus insertion midpoint, distance from anterior and lateral tibia border to medial intercondylar spine), and ratios determined.


RESULTS
The anterior horn midpoint is located at 57.3% +/- 2.7% of tibial width and 12.0% +/- 1.0% of tibial depth, and the posterior horn midpoint is located at 56.5% +/- 1.6% of tibial width and 81.6% +/- 3.4% of tibial depth. The statistical analysis of these measures showed a precise and constant positioning of the medial meniscus insertions on the tibia plateau. We also found constant topographic relations to the medial intercondylar spine.


CONCLUSIONS
The midpoints of both insertion areas of the medial meniscus have constant positions at 57.3% and 56.5% of tibial width and at 12.0% and 81.6% of tibial depth for the anterior and posterior horn, respectively. They can precisely and reproducibly be defined on radiographs.


CONCLUSIONS
We have developed a technique for precise radiographic tibial horn determination, exact placement of the tibial tunnels, and thus reconstruction of meniscus insertion anatomy in medial meniscus transplantation.
Wilmes
Philippe
P
Klinik für Orthopädie und Orthopädische Chirurgie, Universitätskliniken des Saarlandes, Homburg/Saar, Germany. p_wilmes@yahoo.com
Anagnostakos
Konstantinos
K
Weth
Christian
C
Kohn
Dieter
D
Seil
Romain
R
D000368:Aged; D000369:Aged, 80 and over; D002102:Cadaver; D006801:Humans; D008592:Menisci, Tibial / Q000033:anatomy & histology / Q000000981:diagnostic imaging*; D008875:Middle Aged; D015588:Observer Variation; D011187:Posture; D011859:Radiography; D015203:Reproducibility of Results