gms | German Medical Science

Joint German Congress of Orthopaedics and Trauma Surgery

02. - 06.10.2006, Berlin

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The relationship between antero-posterior and rotatory stability and the position of femoral tunnel in the ACL reconstructed knees using patellar tendon graft

Die Beziehung von anteroposteriorer und rotatorischer Stabilität in Abhängigkeit zur femoralen Tunnelpositionierung bei vorderer Kreuzbandplastik unter Verwendung des mittleren Patellarsehnendrittels

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  • H. Takagi - Department of Orthopeadic Surgery Showa Univ. Fujigaoka Hosp, Showa Univ., Yokohama, Japan
  • Y. Mori - Department of Orthopeadic Surgery Showa Univ. Fujigaoka Hosp, Showa Univ., Yokohama, Japan
  • H. Yamashita - Department of Orthopeadic Surgery Showa Univ. Fujigaoka Hosp, Showa Univ., Yokohama, Japan
  • N. Nakada - Department of Orthopeadic Surgery Showa Univ. Fujigaoka Hosp, Showa Univ., Yokohama, Japan

Deutscher Kongress für Orthopädie und Unfallchirurgie. 70. Jahrestagung der Deutschen Gesellschaft für Unfallchirurgie, 92. Tagung der Deutschen Gesellschaft für Orthopädie und Orthopädische Chirurgie und 47. Tagung des Berufsverbandes der Fachärzte für Orthopädie. Berlin, 02.-06.10.2006. Düsseldorf, Köln: German Medical Science; 2006. DocP.2.4.1-184

The electronic version of this article is the complete one and can be found online at: http://www.egms.de/en/meetings/dgu2006/06dgu0291.shtml

Published: September 28, 2006

© 2006 Takagi et al.
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The purpose of this study was to evaluate the relationship between antero-posterior (A-P) and rotatory stability and the position of femoral tunnel in the ACL reconstructed knees using patellar tendon graft. Studies were carried out on 51 knees of 51 patients .We performed two different methods of making the femoral tunnel. Group A: 26 knees were reconstructed by trans-tibial technique at the 1 o`clock positions. Group B: the remaining 25 knees were reconstructed by making the femoral tunnel from antero-medial portal at the 2 o`clock positions. CA4000 was used to measure the following items. The total displacement (TD) was measured during the shift from anterior drawing under a weight of 30lbs to posterior drawing under a weight of 20lbs at 20 degrees of flexion. Rotatory instability was sized dynamically by the pivot shift test. This curve was then qualitatively analyzed, and the anterior displacement of the tibia (PS) was measured. The femoral tunnel position was evaluated using roof-tunnel angle (RTA). (The method reported by Fujita et al.) The mean side-to-side difference values of both TD and PS for Group B were smaller than the values for Group A. The mean RTA was 39.8 degrees for Group A and 63.4 degrees for Group B. These values were thought to be around 1:20 and around 2:20 in the clock respectively. These results suggested that the position was produced near the target. From the results of TD and PS, we thought that it could be better of making the femoral tunnel at near the 2 o`clock position.