Ensaio uniaxial de tração dos tendões dos músculos grácil e semitendinoso humanos

Piedade, Sérgio Rocha; Fabbro, Inácio M. Del; Vidal, Benedicto de Campos; Gamba, Reinaldo

doi:10.1590/s1413-78522001000100001

Cited by 5 publications

(4 citation statements)

References 2 publications

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“…Over the last years, several scientific articles have paid special attention to the response presented by substitute ligaments or autologous tendons when subjected to tension (7)(8)(9).…”

mentioning

confidence: 99%

Cyclic‐loading of the Human Gracilis and Semitendinosus Muscle Tendons: Study of Young Adult Cadavers

Piedade¹,

Fabbro

Mischan

2006

Artificial Organs

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During knee ligament reconstruction, the tendon graft is tensioned to prevent the occurrence of excessive graft elongation during the postoperative period. Tensioning may be achieved by applying a cyclic or static load to the graft during fixation. Although this procedure is part of the surgery, there is no consensus in international literature regarding ideal tension levels to be used in this procedure. This study was conducted on 10 tendons of the human gracilis muscle and 10 tendons of semitendinosus muscle removed from five male cadavers whose mean age was 20.8 years. These tendons underwent 10 in vitro strain cycles at three levels of deformation (2.5, 3, and 4%) and the value of the deforming load used for each cycle was recorded. The statistical analysis demonstrated that in order to attain the same level of deformation during the 10 cycles there was a reduction in the value of strain applied to the graft, observed at the three levels of deformation. It was concluded that the semitendinosus tendon presents a more uniform mechanical behavior and that there is a need for new graft tensioning protocols that consider the force associated with deformation.

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“…Over the last years, several scientific articles have paid special attention to the response presented by substitute ligaments or autologous tendons when subjected to tension (7)(8)(9).…”

mentioning

confidence: 99%

Cyclic‐loading of the Human Gracilis and Semitendinosus Muscle Tendons: Study of Young Adult Cadavers

Piedade¹,

Fabbro

Mischan

2006

Artificial Organs

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“…Sendo assim, as amostras foram preservadas sob congelamento a -10 ºC por, no máximo, 60 dias, conforme indicado por Woo et al (11) , pois neste intervalo de tempo não há interferência sobre as propriedades mecânicas dos ligamentos. Em estudos mais recentes a temperatura de armazenagem foi de -20 ºC (3,12) . Já Resende et al (13) conservaram amostras do ligamento cruzado a -15 ºC.…”

Section: Resultsunclassified

“…Já Resende et al (13) conservaram amostras do ligamento cruzado a -15 ºC. Conforme proposto por Piedade et al (12) , o descongelamento das articulações foi por imersão em solução fisiológica, sob temperatura de aproximadamente 27 ºC. Enquanto Resende et al (13) não utilizaram solução fisiológica no descongelamento, mas umedeceram o ligamento com esta solução durante os testes mecânicos para evitar a desidratação do tecido.…”

Section: Resultsunclassified

Determinação Das Propriedades Biomecânicas Do Ligamento Patelar De Cães (Canis Familiaris Linnaeus, 1758)

et al. 2016

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Resumo O estudo biomecânico de ligamentos articulares geram subsídios às pesquisas de biomateriais ou técnicas de tratamento para substituição ou reparação destas estruturas por ocasião de ruptura ou degeneração. Diante disto, realizaram-se ensaios biomecânicos de tração do ligamento patelar em 53 cães, totalizando 106 ligamentos patelares testados. Foram determinadas a capacidade máxima de resistência em Newtons (N) e a deformação expressa em milímetros (mm), sendo estes dados correlacionados à biometria corporal dos cadáveres dos cães utilizados. A resistência do ligamento patelar direito e esquerdo no grupo das fêmeas foi de 642,6N ±297,2N e 627,0N ±300,6N (p=0,028), respectivamente. Nos machos, verificaram-se valores superiores (p=0,035). O ligamento patelar direito teve capacidade máxima de resistência de 850,8N ±299,9N e o esquerdo 729,3N ±283,5N. Estatisticamente, foi evidenciado que não há correlação significativa (r>0,7) entre os parâmetros biométricos corporais aferidos e a resistência ou deformação do ligamento patelar. Mesmo não havendo correlação estatística significativa, os dados de resistência e deformação do ligamento patelar canino podem gerar embasamento para outras pesquisas, que visam corrigir rupturas de ligamentos articulares.

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“…In three animals (one in Group 1 and two in Group 2) it was performed a tensile strength test of the anastomosis. This test was done at the Faculty of Agriculture Engineering of the University of Campinas utilizing a press (Otawa Texture Co.), weight cells (Berg Cell), a signal amplifier (Kyowa) and the software DAQWARE, according to previous studies performed on the biomechanics of tendons [ 7 ] .…”

Section: Methodsmentioning

confidence: 99%

Experimental Model for Sutureless Proximal Anastomosis by the ViaBahn Open Revascularization Technique (VORTEC)

Freire¹,

Gobbi²,

Fabbro³

et al. 2016

Brazilian Journal of Cardiovascular Surgery

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IntroductionIn the treatment of complex aneurysms, debranching is an extra-anatomical revascularization of visceral arteries followed by endograft coverage of the thoracoabdominal aorta. It eliminates the need for a thoracotomy and aortic clamping, but requires the performance of several technically demanding visceral anastomosis. In 2008, Lachat described visceral revascularization with the use of a sutureless distal anastomosis, performed by the telescoping of an endograft in the visceral branch, named VORTEC (Viabahn Open Revascularization TEChnique).ObjectiveAn experimental model was created to test the feasibility and short term results of performing a telescoped proximal anastomosis to the abdominal aorta.MethodsSwine model. The abdominal aorta was dissected and ligated between the renal arteries and the iliac vessels. Three centimeters bellow the renal arteries a Viabahn endograft was telescoped for 2 cm into the proximal aorta. The other extremity was conventionally anastomosed to the distal aorta. Patency, sealing and tensile strength of the anastomosis were tested.ResultsTime for performing the telescoped anastomosis was shorter (5.4±2.8 min versus 10.3±3.4 min, P<0.05). All grafts were patent and both types of anastomosis presented no bleeding. Immediate tensile strength showed a higher strength of the conventional suture (22.7 x 14.3 N, P<0.09). After 30 days there was no pseudo-aneurysms and the strength of the conventional and VORTEC anastomosis were similar (37.3 x 40.8 N, respectively, P=0.17).ConclusionTelescoped proximal anastomosis by the technique of VORTEC is feasible. After 30 days the tensile strength of the both anastomosis were similar.

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Ensaio uniaxial de tração dos tendões dos músculos grácil e semitendinoso humanos

Cited by 5 publications

References 2 publications

Cyclic‐loading of the Human Gracilis and Semitendinosus Muscle Tendons: Study of Young Adult Cadavers

Cyclic‐loading of the Human Gracilis and Semitendinosus Muscle Tendons: Study of Young Adult Cadavers

Determinação Das Propriedades Biomecânicas Do Ligamento Patelar De Cães (Canis Familiaris Linnaeus, 1758)

Experimental Model for Sutureless Proximal Anastomosis by the ViaBahn Open Revascularization Technique (VORTEC)

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