Efeito tardio e imediato da sutura em tendão extrassinovial íntegro: estudo biomecânico em ratos

Sardenberg, Trajano; Müller, Sérgio Swain; Garms, Luciana Zauhy; Miduati, Francini Belluci

doi:10.1590/s0102-36162011000300013

Cited by 2 publications

(3 citation statements)

References 8 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Other studies that performed biomechanical tests used a greater number of tendons per group (ranging from 5 to 11), than the amount used in the present study. Although some of them found statistically significant differences between groups [27][28] , others did not obtain positive effect of the studied treatment 16,29 .…”

Section: Discussionmentioning

confidence: 88%

“…According to the authors, the treatment at 2.9 J promoted increase (p<0.05) of tendon strength and maximum stress. The strain rate used by these authors during the biomechanical analysis was twofold (1 mm/s) the one used in the present study (0.5 mm/s), which was based on that described by Sardenberg et al 16 There is no standardization of this characteristic in studies that performed biomechanical analysis in rat tendons. There are studies that used from 0.1 mm/s 15 up to 1 mm/s 22 .…”

Section: Discussionmentioning

confidence: 99%

“…A tendon fragment of approximately 1 cm was tested to failure using a computer--controlled tissue testing devise (Instron Brasil, Tocantins, Barueri, SP, Brazil), which provided a tendon strain diagram. The tendon was clamped and then load to failure was carried out at a strain rate of 0.5 mm/s 16 , and the distance between the claws was 6 mm. The variables maximum load (N), stress at maximum load (MPa) and maximum extension (mm) were measured.…”

Section: Physical Evaluationmentioning

confidence: 99%

See 2 more Smart Citations

Achilles tendon of wistar rats treated with laser therapy and eccentric exercise

Souza

Silva

et al. 2015

Rev Bras Med Esporte

View full text Add to dashboard Cite

Introduction: Both laser therapy and eccentric exercises are used in tendon injuries. However, the association of these physiotherapeutic modalities is yet little investigated. Objective: To evaluate the effect of low-level laser therapy associated to eccentric exercise (downhill walking) on Achilles tendinopathy of Wistar rats. Method: Eighteen Achilles tendon from 15 adult male Wistar rats were used. Tendons were distributed in six groups (laser, eccentric exercise, laser and eccentric exercise, rest, contralateral tendon, and healthy tendon). Unilateral tendinopathy was surgically induced by transversal compression followed by scarification of tendon fibers. The treatments laser therapy (904 nm, 3J/cm²) and/or eccentric exercise (downhill walking; 12 m/min; 50 min/day; 15 o inclination treadmill) began 24 hours after surgery and remained for 20 days. Clinical and biomechanical analyzes were conducted. Achilles tendon was macroscopically evaluated and the transversal diameter measured. Euthanasia was performed 21 days after lesion induction. Tendons of both limbs were collected and frozen at -20°C until biomechanical analysis, on which the characteristic of maximum load (N), stress at ultimate (MPa) and maximum extension (mm) were analyzed. Results: Swelling was observed within 72 hours postoperative. No fibrous adhesions were observed nor increase in transversal diameter of tendons. Animals with the exercised tendons, but not treated with laser therapy, presented lower (p=0.0000) locomotor capacity. No difference occurred between groups for the biomechanical characteristics maximum load (p=0.4379), stress at ultimate (p=0.4605) and maximum extension (p=0.3820) evaluated, even considering healthy and contralateral tendons. Conclusion: The concomitant use of low-level laser and the eccentric exercise of downhill walking, starting 24 hours after surgically induced tendinopathy, do not result in a tendon with the same biomechanical resistance or elasticity as a healthy tendon. On the other hand, it also does not influence negatively the structure and function of the Achilles tendon.

show abstract