Persisting side-to-side differences in bone mineral content, but not in muscle strength and tendon stiffness after anterior cruciate ligament reconstruction

Rittweger, Jorn, Reeves, Neil D., Narici, Marco V., Belavý, Daniel L., Maganaris, Constantinos N. and Maffulli, Nicola 2011, Persisting side-to-side differences in bone mineral content, but not in muscle strength and tendon stiffness after anterior cruciate ligament reconstruction, Clinical physiology and functional imaging, vol. 31, no. 1, pp. 73-79, doi: 10.1111/j.1475-097X.2010.00982.x.

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Title Persisting side-to-side differences in bone mineral content, but not in muscle strength and tendon stiffness after anterior cruciate ligament reconstruction
Author(s) Rittweger, Jorn
Reeves, Neil D.
Narici, Marco V.
Belavý, Daniel L.ORCID iD for Belavý, Daniel L. orcid.org/0000-0002-9307-832X
Maganaris, Constantinos N.
Maffulli, Nicola
Journal name Clinical physiology and functional imaging
Volume number 31
Issue number 1
Start page 73
End page 79
Total pages 7
Publisher Wiley
Place of publication London, Eng.
Publication date 2011-01
ISSN 1475-097X
Keyword(s) Science & Technology
Life Sciences & Biomedicine
Physiology
bone strength
clinical physiology
injury
patellar tendon bone graft
peripheral Quantitative Computed Tomography
DAYS BED REST
RESISTANCE EXERCISE
STRAIN MAGNITUDE
FOLLOW-UP
LOWER LEG
KNEE
ADAPTATION
DURATION
MASS
Summary Tendon stiffness may be involved in limiting peak musculoskeletal forces and thus may constitute an upper limit for bone strength. The patellar tendon bone (PTB) graft, which is harvested from the patellar tendon during surgical reconstruction of the anterior cruciate ligament (ACL), is an ideal scenario to test this hypothesis. Eleven participants were recruited who had undergone surgical reconstruction of the ACL with a PTB graft 1-10 years prior to study inclusion. As previously reported, there was no side-to-side difference in thigh muscle cross-sectional area, in maximum voluntary knee extension torque, or in patellar tendon stiffness, suggesting full recovery of musculature and tendon. However, in the present study bone mineral content (BMC), assessed by peripheral quantitative computed tomography, was lower on the operated side than on the control side in four regions studied (P = 0·0019). Differences were less pronounced in the two sites directly affected by the operation (patella and tibia epiphysis) when compared to the more remote sites. Moreover, significant side-to-side differences were found in BMC in the trabecular compartment in the femoral and tibial epiphysis (P = 0·004 and P = 0·047, respectively) with reductions on the operated side, but increased in the patella (P = 0·00016). Cortical BMC, by contrast, was lower on the operated side at all sites except the tibia epiphysis (P = 0·09). These findings suggest that impaired recovery of BMC following ACL reconstruction is not because of lack of recovery of knee extensor strength or patellar tendon stiffness. The responsible mechanisms still remain to be determined.
Language eng
DOI 10.1111/j.1475-097X.2010.00982.x
Field of Research 110699 Human Movement and Sports Science not elsewhere classified
Socio Economic Objective 920299 Health and Support Services not elsewhere classified
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2010, Wiley
Persistent URL http://hdl.handle.net/10536/DRO/DU:30071047

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