Abstract: An orthopedic joint hinge assembly includes a first elongated member, a first coupler attached to the first elongated member and including a first interface surface, a second elongated member, and a second coupler attached to the second elongated member and including a second interface surface. Each of the first and second couplers is constrained to rotate about an axis of rotation. The first and second interface surfaces are offset from the axis of rotation and engage each other to block a relative rotation between the first and second members in a first direction and separate from each other to permit a relative rotation in an opposite direction.

Abstract: Collapsible orthopedic fixation assemblies and related methods are disclosed. A collapsible fixation assembly includes end frames that are coupled with one or more cross beams. The fixation assembly is reconfigurable between a collapsed configuration in which the end frames are substantially aligned with the one or more cross beams and a deployed configuration in which the end frames are oriented transverse to the one or more cross beams and in which relative movement between the end frames and the one or more cross beams can be inhibited. The fixation assembly is configured to support at least one bone-interface component, which is configured to constrain a bone of a patient. In the collapsed configuration, the fixation assemblies is more compact than in the deployed configuration, thereby making it more easy to store and transport as compared to a comparable non-collapsible fixation assembly.