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Muscle contributions to medial tibiofemoral compartment contact loading following ACL reconstruction using semitendinosus and gracilis tendon grafts.

Abstract The muscle-tendon properties of the semitendinosus (ST) and gracilis (GR) are substantially altered following tendon harvest for the purpose of anterior cruciate ligament reconstruction (ACLR). This study adopted a musculoskeletal modelling approach to determine how the changes to the ST and GR muscle-tendon properties alter their contribution to medial compartment contact loading within the tibiofemoral joint in post ACLR patients, and the extent to which other muscles compensate under the same external loading conditions during walking, running and sidestep cutting.
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PMID- 28423061
OWN - NLM
STAT- MEDLINE
DA  - 20170419
DCOM- 20170428
LR  - 20170505
IS  - 1932-6203 (Electronic)
IS  - 1932-6203 (Linking)
VI  - 12
IP  - 4
DP  - 2017
TI  - Muscle contributions to medial tibiofemoral compartment contact loading following
      ACL reconstruction using semitendinosus and gracilis tendon grafts.
PG  - e0176016
LID - 10.1371/journal.pone.0176016 [doi]
AB  - BACKGROUND: The muscle-tendon properties of the semitendinosus (ST) and gracilis 
      (GR) are substantially altered following tendon harvest for the purpose of
      anterior cruciate ligament reconstruction (ACLR). This study adopted a
      musculoskeletal modelling approach to determine how the changes to the ST and GR 
      muscle-tendon properties alter their contribution to medial compartment contact
      loading within the tibiofemoral joint in post ACLR patients, and the extent to
      which other muscles compensate under the same external loading conditions during 
      walking, running and sidestep cutting. MATERIALS AND METHODS: Motion capture and 
      electromyography (EMG) data from 16 lower extremity muscles were acquired during 
      walking, running and cutting in 25 participants that had undergone an ACLR using 
      a quadruple (ST+GR) hamstring auto-graft. An EMG-driven musculoskeletal model was
      used to estimate the medial compartment contact loads during the stance phase of 
      each gait task. An adjusted model was then created by altering muscle-tendon
      properties for the ST and GR to reflect their reported changes following ACLR.
      Parameters for the other muscles in the model were calibrated to match the
      experimental joint moments. RESULTS: The medial compartment contact loads for the
      standard and adjusted models were similar. The combined contributions of ST and
      GR to medial compartment contact load in the adjusted model were reduced by 26%, 
      17% and 17% during walking, running and cutting, respectively. These deficits
      were balanced by increases in the contribution made by the semimembranosus muscle
      of 33% and 22% during running and cutting, respectively. CONCLUSION: Alterations 
      to the ST and GR muscle-tendon properties in ACLR patients resulted in reduced
      contribution to medial compartment contact loads during gait tasks, for which the
      semimembranosus muscle can compensate.
FAU - Konrath, Jason M
AU  - Konrath JM
AD  - School of Allied Health Sciences and Menzies Health Institute Queensland,
      Griffith University, Gold Coast, Queensland, Australia.
FAU - Saxby, David J
AU  - Saxby DJ
AD  - School of Allied Health Sciences and Menzies Health Institute Queensland,
      Griffith University, Gold Coast, Queensland, Australia.
FAU - Killen, Bryce A
AU  - Killen BA
AD  - School of Allied Health Sciences and Menzies Health Institute Queensland,
      Griffith University, Gold Coast, Queensland, Australia.
FAU - Pizzolato, Claudio
AU  - Pizzolato C
AD  - School of Allied Health Sciences and Menzies Health Institute Queensland,
      Griffith University, Gold Coast, Queensland, Australia.
FAU - Vertullo, Christopher J
AU  - Vertullo CJ
AD  - School of Allied Health Sciences and Menzies Health Institute Queensland,
      Griffith University, Gold Coast, Queensland, Australia.
AD  - Knee Research Australia, Gold Coast, Queensland, Australia.
FAU - Barrett, Rod S
AU  - Barrett RS
AD  - School of Allied Health Sciences and Menzies Health Institute Queensland,
      Griffith University, Gold Coast, Queensland, Australia.
FAU - Lloyd, David G
AU  - Lloyd DG
AD  - School of Allied Health Sciences and Menzies Health Institute Queensland,
      Griffith University, Gold Coast, Queensland, Australia.
LA  - eng
PT  - Journal Article
DEP - 20170419
PL  - United States
TA  - PLoS One
JT  - PloS one
JID - 101285081
SB  - IM
MH  - Adaptation, Physiological
MH  - Adult
MH  - Anterior Cruciate Ligament/pathology/*surgery
MH  - Anterior Cruciate Ligament Injuries/pathology/*rehabilitation/surgery
MH  - Anterior Cruciate Ligament Reconstruction/*methods
MH  - Biomechanical Phenomena
MH  - Electromyography
MH  - Female
MH  - Gait/physiology
MH  - Gracilis Muscle/injuries/*transplantation
MH  - Hamstring Muscles/injuries/physiology/transplantation
MH  - Hamstring Tendons/injuries/*transplantation
MH  - Humans
MH  - Knee Joint/*physiology
MH  - Male
MH  - Models, Anatomic
MH  - Running/physiology
MH  - Transplantation, Autologous
MH  - Walking/physiology
PMC - PMC5397063
EDAT- 2017/04/20 06:00
MHDA- 2017/04/30 06:00
CRDT- 2017/04/20 06:00
PHST- 2016/06/10 [received]
PHST- 2017/04/04 [accepted]
AID - 10.1371/journal.pone.0176016 [doi]
AID - PONE-D-16-23312 [pii]
PST - epublish
SO  - PLoS One. 2017 Apr 19;12(4):e0176016. doi: 10.1371/journal.pone.0176016.
      eCollection 2017.

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