Fracture Repair Using a Polyaxial Locking Plate System (PAX)

Abstract

The PAX system allows for multidirectional screw insertion with an overall complication rate and time to functional union similar to other fracture repair implant systems.

Screw Loosening and Pelvic Canal Narrowing After Lateral Plating of Feline Ilial Fractures With Locking and Nonlocking Plates

“…Furthermore, all LPS plates were titanium while DCP plates were stainless steel. Both plate thickness and material suggest that LPS plates were at increased risk of failure compared to DCP plates . However, no plate bending or breakage was observed.…”

“…Both experimental and clinical studies performed in dogs and cats provide evidence of greater construct stability of locking plates compared to nonlocking plates . Locking plates prohibit movement at the plate‐screw interface, which decreases the risk of screw loosening and pull out . Locking plates may offer advantages in thin bones with minimal screw purchase in the bone such as feline ilial fractures …”

“…Locking plates prohibit movement at the plate‐screw interface, which decreases the risk of screw loosening and pull out . Locking plates may offer advantages in thin bones with minimal screw purchase in the bone such as feline ilial fractures …”

Plate failure by bending following tibial fracture stabilisation in 10 cats

“…These included 3 broken plates, 3 bent plates resulting in malunion and 1 bent plate associated with a nonunion. The femur was the predominant bone involved but a broken plate associated with a fractured tibia was reported but not described in detail (Barnhart et al, 2013). Malunion with valgus angulation has been reported following external coaptation of a cat mid-diaphyseal tibial fracture (Harari, 2002).…”

“…Richardson & Thacher, 1993, report malunion following open reduction and internal fixation of a cat's tibia with a plate, but further details were not given. Plate failure in 6 of 62 dog and cat fractures repaired using a polyaxial locking plate system is documented (Barnhart et al, 2013). These included 3 broken plates, 3 bent plates resulting in malunion and 1 bent plate associated with a nonunion.…”