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Media type:
E-Article
Title:
Mechanical strength of four allograft fixation techniques for ruptured cranial cruciate ligament repair in dogs
Contributor:
Biskup, Jeffery J.;
Balogh, Daniel G.;
Haynes, Kevin H.;
Freeman, Andy L.;
Conzemius, Michael G.
Published:
American Veterinary Medical Association (AVMA), 2015
Published in:
American Journal of Veterinary Research, 76 (2015) 5, Seite 411-419
Language:
Not determined
DOI:
10.2460/ajvr.76.5.411
ISSN:
0002-9645
Origination:
Footnote:
Description:
AbstractOBJECTIVE To test ex vivo mechanical properties of 4 allograft fixation techniques for cranial cruciate ligament (CCL) replacement.SAMPLE 30 stifle joints from canine cadavers.PROCEDURES CCL-deficient stifle joints repaired by 1 of 4 techniques (n = 6/group) and CCL-intact stifle joints (control group; 6) were mechanically tested. Three repair techniques involved a patella-patella ligament segment (PPL) allograft: a tibial and femoral interference screw (PPL-2S), a femoral interference screw and the patella seated in a tapering bone tunnel in the tibia (PPL-1S), or addition of a suture and a bone anchor to the PPL-1S (PPL-SL). The fourth technique involved a deep digital flexor tendon (DDFT) allograft secured with transverse femoral fixation and stabilized with a tibial interference screw and 2 spiked washers on the tibia (DDFT-TF). The tibia was axially loaded at a joint angle of 135°. Loads to induce 3, 5, and 10 mm of femoral-tibia translation; stiffness; and load at ultimate failure with the corresponding displacement were calculated. Group means were compared with a multivariate ANOVA.RESULTS Mean ± SD load for the intact (control) CCL was 520.0 ± 51.3 N and did not differ significantly from the load needed to induce 3 mm of femoral-tibial translation for fixation techniques PPL-SL (422.4 ± 46.3 N) and DDFT-TF (654.2 ± 117.7 N). Results for the DDFT-TF were similar to those of the intact CCL for all outcome measures.CONCLUSIONS AND CLINICAL RELEVANCE The DDFT-TF yielded mechanical properties similar to those of intact CCLs and may be a viable technique to test in vivo.