Effect of immobilization in a lengthened position on mechanical properties of the Achilles tendon in growing rats

• Autorzy: Trębacz H.
• Języki publikacji: EN

Abstrakty

EN

The purpose of the study was to examine the effect of long-lasting immobilization in a lengthened position on mechanical properties of immature tendon in a rat model. One hindlimb of growing rat was immobilized for two weeks with the Achilles tendon in extension. Tensile failure test was performed post-mortem at a rate of 10 mnimin without any preconditioning. Immobilization caused reduction of the elastic range of deformation both considering force and extension. The stiffness of tendons was decreased, especially at small strains in an inelastic 'toe' region. However, the plastic range was broader and the maximum load similar compared to these of normal tendons. It was revealed that immobilization, even under constant tension, changes significantly mechanical properties of tendons in the range of small strams encountered during physiological loading. The changes may alter the behaviour of a joint after restoration of a normal activity.

Słowa kluczowe

EN

immobilization; Achilles tendon; mechanical properties

PL

unieruchomienie; ścięgno Achillesa

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Acta of Bioengineering and Biomechanics
• Rocznik: 2005
• Tom: Vol. 7, nr 2
• Strony: 80--86
• Opis fizyczny: Bibliogr. 15 poz., wykr.

Twórcy

autor

Trębacz H.

• Department of Biophysics, Medical Academy of Lublin. Al. Raclawickie 1, 20-059 Lublin, Poland

Bibliografia

• [1] AMIEL D., WOO S.L., HARWOOD F.L., AKESON W.H., The effect of immobilization on collagen turnover in connective tissue: a biochemical-biomechanical correlation, Acta Orthop. Scand., 1982, 53(3), 325–332.
• [2] HARWOOD F.L., AMIEL D., Differential metabolic responses of periarticular ligaments and tendon to joint immobilization, J. Appl. Physiol., 1992, 72(5), 1687–1691.
• [3] SAVOLAINEN J., MYLLYLA V., MYLLYLA R., VIHKO V., VAANANEN K., TAKALA T.E., Effects of denervation and immobilization on collagen synthesis in rat skeletal muscle and tendon, Am. J. Physiol., 1988, 254(6 Pt 2), R897–902.
• [4] WALSH S., FRANK C., HART D., Immobilization alters cell metabolism in an immature ligament, Clin. Orthop. Relat. Res., 1992, 277, 277–288.
• [5] WOO S.L., GOMEZ M.A., SITES T.J., NEWTON P.O., ORLANDO C.A., AKESON W.H., The biomechanical and morphological changes in the medial collateral ligament of the rabbit after immobilization and remobilization, J. Bone Joint Surg. Am., 1987, 69(8), 1200–1211.
• [6] ALMEIDA-SILVEIRA M.I., LAMBERTZ D., PEROT C., GOUBEL F., Changes in stiffness induced by hindlimb suspension in rat Achilles tendon, Eur. J. Appl. Physiol., 2000, Vol. 81(3), 252–257.
• [7] LOITZ B.J., ZERNICKE R.F., VAILAS A.C., KODY M.H., MEALS R.A., Effects of short-term immobilization versus continuous passive motion on the biomechanical and biochemical properties of the rabbit tendon, Clin. Orthop. Relat. Res., 1989, 244, 265–271.
• [8] MATSUMOTO F., TRUDEL G., UHTHOFF H.K., BACKMAN D.S., Mechanical effects of immobilization on the Achilles tendon, Arch. Phys. Med. Rehabil., 2003, 84(5), 662–667.
• [9] MULLNER T., KWASNY O., REIHSNER R., LOHNERT V., SCHABUS R., Mechanical properties of a rat patellar tendon stress-shielded in situ, Arch. Orthop. Trauma Surg., 2000, 120(1–2), 70–74.
• [10] KANNUS P., JARVINEN T.L.N., SIEVANEN H., KVIST M., RAUHANIEMI J., MAUNU V.-M., HURME T., JOZSA L., JARVINEN M., Effects of immobilization, three forms of remobilization, and subsequent deconditioning on bone mineral content and density in rat femora, J. Bone Min. Res., 1996, 11(9), 1339–1346.
• [11] TRĘBACZ H., Disuse induced deterioration of bone strength is not stopped after free remobilization in young adult rats, J. Biomech., 2001, 34(12), 1631–1636.
• [12] TRĘBACZ H., BAJ J., Effect of immobilization on physical properties of femurs in growing rats, Polish J. Med. Phys. & Eng., 1999, 5, (3), 141–147.
• [13] HERBERT R.D., BALNAVE R.J., The effect of position of immobilization on resting length, resting stiffness, and weight of the soleus muscle of the rabbit, J. Orthop. Res., 1993, 11(3), 358–366.
• [14] JARVINEN M.J., EINOLA S.A., VIRTANEN E.O., Effect of the position of immobilization upon the tensile properties of the rat gastrocnemius muscle, Arch. Phys. Med. Rehabil., 1992, 73(3), 253– 257.
• [15] KER R.F., The implications of the adaptable fatigue quality of tendons for their construction, repair and function, Comp. Biochem. Physiol., 2002, 133A, 987–1000.