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33rd Annual Scientific Meeting proceedings
Stream:
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Session: Orthopaedic Short Communications
Date/Time: 05-07-2024 (11:30 - 11:45)
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Location: Auditorium 2
Effect of palmar tension band technique used in fetlock joint arthrodesis on distal limb joint angles in cadaveric horse limbs during loading.
Hansen SH1, Chatterjee A2, Bramlage LR*3, Lescun TB*1
1Department of Veterinary Clinical Sciences, College of Veterinary Medicine, Purdue University, West Lafayette, IN, USA, 2Department of Mechanical Engineering, Birla Institute of Technology and Science,, Hyderabad, India, 3Rood and Riddle Equine Hospital, Lexington, KY, USA.
Objectives:
Arthrodesis is used to treat end-stage fetlock osteoarthritis in horses. The preferred technique includes a palmar tension band created by proximal sesamoid bone (PSB) screw fixation or stainless-steel cable (CAB). The biomechanical effects of these techniques have not been evaluated in detail. We aimed to evaluate distal limb joint angles during loading following application of the 2 tension band techniques. We hypothesized that distal limb joint angles between the groups would differ during both cyclic and failure testing.
Methods:
Ten pairs of cadaver limbs were tested. Initial instrumentation included dorsal plate fixation with each palmar tension band (PSB or CAB) in a limb pair. Distal limb joint angles were measured using image capture (Qualisys). Limbs were cycled in compression (120,000 cycles) from 0.5 to 3.6kN with the plate, following plate removal (0.5-2kN), and finally in single cycle to failure. Paired t-tests were used to compare the effect of palmar tension band technique on joint angles with p<0.05.
Results:
Fetlock angle did not differ during cyclic testing but was different between groups during load to failure (p<0.001). Conversely, the change in pastern and coffin joint angles was different between groups (p-=0.01 and p=0.03) during cyclic testing but did not differ during load to failure.
Conclusions:
Differing attachment locations and anatomic structures engaged in the 2 tension band constructs may account for the difference in joint angles measured during this study. Consideration of these differences should be given when selecting a palmar tension band technique for fetlock arthrodesis in clinical cases of osteoarthritis.
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