Author/Authors :
Omer TASER، نويسنده , , Yavuz KOCABEY، نويسنده , , Mahmut Nedim DORAL، نويسنده , , Mehmet DEMiRHAN، نويسنده , , Erdem Ugur ISIKAN، نويسنده , , John Nyland، نويسنده , , Sezgin Sarban، نويسنده , , Ergun BOZDAGI، نويسنده , , Emin SUNBULOGLU، نويسنده ,
Title Of Article :
The effect of the tibial tunnel fixation level on the results of cyclic loading in anterior cruciate ligament reconstruction
Latin Abstract :
Objectives : This study was designed to compare the biome- chanical characteristics of non-anatomic (far from joint) and anatomic (close to joint) levels of tibial tunnel fixation with soft tissue graft using a soft tissue interference screw in ante¬rior cruciate ligament (ACL) reconstruction. Meth o d s : Twelve bovine tibiae and digital extensor ten¬dons were divided into two homogeneously equal groups after removing soft tissues. Tibial tunnels were prepared with a 7-mm drill with the use of an ACL guide adjusted to 45°. Each tunnel was then dilated to 9 mm in 0.5 mm incre¬ments. Digital extensor tendons were fixed at non-anatom¬ic (group I) or anatomic (group II) tibial tunnel levels with a soft tissue metal interference screw, 9x30 mm in size. All the specimens were cycled 500 times from 50 to 250 N with ʹ Hz frequency in a servo-hydraulic testing machine fol¬lowed by ultimate load at-failure testing at a rate of 20 mm/min. Statistical analyses were made using the Mann- Whitney U-test. Results: The mean screw insertion torque values were 8.2+2.4 Nm and 7.8+2.3 Nm in groups I and II, respectively (p=0.88). The mean values of graft displacement (ʹ.9+0.75 mm versus 2.2+1.2 mm, p=0.63) and stiffne s s (ʹ32.72+10.93 N/mm versus ʹ25.ʹ4+ʹ5.93 N/mm, p=0.63) did not differ significantly, either. Conclusion: The biomechanical properties of ACL recon¬struction with soft tissue graft fixation using a soft tissue interference screw are not influenced by the level of tibial tunnel fixation.
NaturalLanguageKeyword :
Tendons , transplantation , surgery , Torque , Absorbable implants , Anterior cruciate ligament , surgery , biomechanics , bone density , Bone screws , Cattle , Tensile strength , Tibia
JournalTitle :
Studia Iranica
