[Biomechanic analysis of the sewed tendons for the reconstruction of the anterior cruciate ligament].
OBJECTIVE
To evaluate the difference of the mechanical behavior of bended tied (sewed) and not tied hamstring tendons in order to evaluate if it has any effective function.


METHODS
Twenty-four fresh bovine digital tendons had been used. Alginate to determine the area of the tendon transversal section was used. Ten bovine tendons had been bended and tied following the manufacturer orientation, ten others pairs had not been tied. Claws had been developed for the grafts fixation to the universal machine, for the setting simulation. The superior one was characterized to be bipartite and to have controlled passage for the pins and the inferior claw is characterized to have alternating teeth.


RESULTS
The maximum load of the not tied samples of the test was 849,4 N +/- 386,8 the area was 30,4 mm(2) +/- 7,7, and 29 +/- 17 Mpa of tension. The tied ones had gotten maximum load of 871,8 N +/- 484,9, area of 35 mm(2) +/- 5,8, and 24 +/- 10 Mpa of tension. It did not have statistical difference between the two groups (p>0,05).


CONCLUSIONS
The probability distribution showed that with 400 N the not tied tendons represents 83,8% of trustworthiness and the tied ones represents 78,5%.
Stieven Filho
Edmar
E
CTEA, Curitiba, PR, Brasil. ipem@evangelico.org.br
Malafaia
Osvaldo
O
Ribas-Filho
Jurandir Marcondes
JM
Diniz
Otaviano Esteves dos Santos
OE
Borges
Paulo César
PC
Albano
Mauro
M
Kume
Márcio
M
da Silva
João Luiz Vieira
JL
Namba
Mario
M
D000818:Animals; D016118:Anterior Cruciate Ligament / Q000502:physiology / Q000601:surgery*; D001696:Biomechanical Phenomena; D002417:Cattle; D013536:Suture Techniques; D013710:Tendons / Q000601:surgery*