primaLOK FF 40mm Implant Assembly, Sterile The Wenzel Spine primaLOK FF Facet Fixation System is intended to stabilize the spine as an aid to fusion through bilateral immobilization of the facet joints. It is intended for use with or without bone graft, at a single or multiple levels from L1 to S1 inclusive. It is indicated for the posterior surgical treatment of any or all of the following: degenerative disc disease (DDD) as defined by back pain of discogenic origin with degeneration of the facets with instability, trauma (i.e., fracture or dislocation), spondylolisthesis, spondylolysis, and pseudoarthrosis and failed fusions which are symptomatic or which may cause secondary instability or deformity. For transfacet fixation, the screws are inserted through the inferior articular process across the facet joint and into the pedicle. For translaminar facet fixation, the screws are inserted through the lateral aspect of the spinous process, through the lamina, through the inferior articular process, across the facet joint and into the pedicle.
A small, sterile, threaded rod with a slotted head typically used for internal orthopaedic fracture fixation by being screwed into bone to hold plates or nails to bone or to provide direct interfragmentary stabilization of bone, or it may fasten soft tissue to bone; it is made of a material that cannot be chemically degraded or absorbed via natural body processes (includes implant grade metal such as surgical steel, titanium alloy, or carbon fibre). There are a number of kinds available: cortical, cancellous, malleolar, scaphoid, partially-threaded and fully-threaded, self-tapping, and cannulated. A "lag screw" can be any of these used to obtain compression across bone fragments.
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