Mechanical properties of a rat patellar tendon stress-shielded in situ.
Arch Orthop Trauma Surg
; 120(1-2): 70-4, 2000.
Article
em En
| MEDLINE
| ID: mdl-10653108
ABSTRACT
The effects of stress deprivation on the mechanical properties of the patellar tendon (PT) were studied using 14 albino rats. The PT was stress-shielded with cerclages on one side, while the contralateral patellar tendon served as a sham-operated control. After 10 weeks, paired load-strain as well as load-relaxation experiments were performed (11 and 3 specimen pairs, respectively). Mechanical tests showed, irrespective of the cerclage material used, that strain was increased significantly after stress-shielding (P < 0.02). The time constant significantly decreased in the stress-shielded specimens under 5 N loads, which may be considered 'physiological'. Tissue remodeling might explain the observed changes in the viscoelastic behaviour of the stress-shielded tendons. Loading, even in the physiological range of normal daily activity, may lead to an elongation of previously stress-shielded tendons or ligaments and consequently alter the behaviour of a joint.
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Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Patela
/
Estresse Fisiológico
/
Tendões
Limite:
Animals
Idioma:
En
Revista:
Arch Orthop Trauma Surg
Ano de publicação:
2000
Tipo de documento:
Article