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Knee Surgery, Sports Traumatology, Arthroscopy

, Volume 19, Issue 8, pp 1233–1238 | Cite as

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

  • Akira Maeyama
  • Yuichi Hoshino
  • Anibal Debandi
  • Yuki Kato
  • Kazuhiko Saeki
  • Shigehiro Asai
  • Bunsei Goto
  • Patrick Smolinski
  • Freddie H. FuEmail author
Knee

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.

Keywords

Rotational instability Triaxial accelerometer ACL Porcine model 

Notes

Conflict of interest

No conflict of interest is declared.

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Copyright information

© Springer-Verlag 2011

Authors and Affiliations

  • Akira Maeyama
    • 1
  • Yuichi Hoshino
    • 2
  • Anibal Debandi
    • 2
  • Yuki Kato
    • 2
  • Kazuhiko Saeki
    • 1
  • Shigehiro Asai
    • 2
  • Bunsei Goto
    • 2
  • Patrick Smolinski
    • 3
  • Freddie H. Fu
    • 2
    • 3
    Email author
  1. 1.Department of Orthopaedic Surgery, School of MedicineFukuoka UniversityFukuokaJapan
  2. 2.Department of Orthopaedic SurgeryUniversity of Pittsburgh Medical CenterPittsburghUSA
  3. 3.Department of Mechanical Engineering and Materials ScienceUniversity of PittsburghPittsburghUSA

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