Journal of Shoulder and Elbow Surgery
Original articleMechanical changes induced by thermal stimulation in collagenous tissue
Section snippets
Materials and methods
The study used 12 New Zealand White rabbits supplied by the same breeder. The animals were 4 to 6 months old, and their mean weight was 2.5 kg. The study was conducted in the Biological Research Institute of the Health and Environment State Department in the State of Rio Grande do Sul (Instituto de Pesquisas Biológicas da Secretaria Estadual da Saúde e do Meio Ambiente do Rio Grande do Sul), Brazil. Animal care followed ethical norms and animal experimentation legislation established by
Results
No significant differences were found in the measurements of the area between the monofilament nylon sutures at cauterization and at 8 weeks.
The data in the load vs deformation graph obtained from the stress tests (Figure 1) provided the tendon rupture point (TRP), which represents the load (N) necessary for tendon rupture, and the tendon elasticity coefficient (TEC), calculated according to the curve slope in the area of elastic deformation (N/mm).
The results described in Table I were obtained
Discussion
The laxity of capsule and ligament structures and the consequent joint instability are difficult to resolve posttraumatic sequelae, even for an experienced orthopedist. The large number of surgical techniques reported in the literature reinforces the idea that the results of treatment of these tissues are not always as expected, and clinical outcomes can be unsatisfactory. Moreover, several of these techniques cause an initial weakening of these capsular and ligament structures, which requires
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