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Knee Surgery, Sports Traumatology, Arthroscopy

Erschienen in:

01.08.2011 | Knee

Evaluation of rotational instability in the anterior cruciate ligament deficient knee using triaxial accelerometer: a biomechanical model in porcine knees

verfasst von: Akira Maeyama, Yuichi Hoshino, Anibal Debandi, Yuki Kato, Kazuhiko Saeki, Shigehiro Asai, Bunsei Goto, Patrick Smolinski, Freddie H. Fu

Erschienen in: Knee Surgery, Sports Traumatology, Arthroscopy | Ausgabe 8/2011

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Abstract

Purpose

To measure the acceleration in multiple directions of the rotational instability in ACL deficient models using porcine knees.

Methods

Ten porcine knees were tested with ACL intact and tear models. The pivot shift test was performed manually, and the acceleration of the pivot shift phenomenon was recorded by the use of a triaxial accelerometer. Tests were repeated in four different ACL states: (1) intact; (2) partial AM deficient; (3) complete AM deficient, and (4) complete ACL (AM and PL) deficient. The acceleration in three directions and the magnitude of acceleration were measured to evaluate rotational instability and compare between different ACL conditions.

Results

Significantly increased accelerations were observed in the complete deficient ACL model, while the partial ACL tear models demonstrated a slight increase without statistical significance. The accelerometer detected stepwise increases in the acceleration with the extent of ACL tear. Additionally, the PL bundle exhibited the largest contribution for rotational instability (80.4%) when compared with the AM (19.5%) bundles.

Conclusion

Triaxial accelerometer could serve as a quantitative evaluation of rotational instability. The present study demonstrated that PL bundle has the most important contribution for rotational instability (80.4%) when compared to IM bundle (0.01%) and AM bundle (19.5%) in porcine knee model.

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Titel: Evaluation of rotational instability in the anterior cruciate ligament deficient knee using triaxial accelerometer: a biomechanical model in porcine knees
verfasst von: Akira Maeyama
Yuichi Hoshino
Anibal Debandi
Yuki Kato
Kazuhiko Saeki
Shigehiro Asai
Bunsei Goto
Patrick Smolinski
Freddie H. Fu
Publikationsdatum: 01.08.2011
Verlag: Springer-Verlag
Erschienen in: Knee Surgery, Sports Traumatology, Arthroscopy / Ausgabe 8/2011
Print ISSN: 0942-2056
Elektronische ISSN: 1433-7347
DOI: https://doi.org/10.1007/s00167-010-1382-z

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Evaluation of rotational instability in the anterior cruciate ligament deficient knee using triaxial accelerometer: a biomechanical model in porcine knees