A mechanical comparison of bone-ligament-bone autografts from the wrist for replacement of the scapholunate ligament.
A study was performed to compare the mechanical properties of two intracarpal ligaments with those of the dorsal component of the scapholunate interosseous ligament (SLIL). Trapezoid-to-second metacarpal, capitate-to-trapezoid ligaments, and the dorsal part of the SLIL were obtained as bone-ligament-bone grafts from fresh frozen cadavers. Their respective load to failure and stiffness were measured under uniaxial load on a servohydraulic machine and compared. The capitate-to-trapezoid ligament closely approximated the load to failure and stiffness of the dorsal SLIL, whereas the trapezoid-to-second metacarpal ligament was significantly stronger and stiffer than the dorsal SLIL. These 2 intracarpal bone-ligament-bone grafts share similar mechanical properties with the dorsal component of the scapholunate ligament and might be used clinically to replace it.
Cuénod
Philippe
P
Center for Hand Surgery and Therapy, Geneva, Switzerland.
Charrière
Eric
E
Papaloïzos
Michaël Y
MY
D000368:Aged; D001696:Biomechanical Phenomena; D002102:Cadaver; D002348:Carpal Bones / Q000601:surgery; D003627:Data Interpretation, Statistical; D005260:Female; D006801:Humans; D008023:Ligaments, Articular / Q000033:anatomy & histology / Q000502:physiology* / Q000637:transplantation*; D012667:Lunate Bone / Q000601:surgery; D008297:Male; D008663:Metacarpus / Q000601:surgery; D021361:Scaphoid Bone / Q000601:surgery; D013314:Stress, Mechanical; D013718:Tensile Strength / Q000502:physiology; D014182:Transplantation, Autologous; D016474:Weight-Bearing / Q000502:physiology*; D014955:Wrist Joint / Q000601:surgery