working length
The distance between screws in plate fixation that determines construct flexibility and stress distribution.
Full Definition
Working length is a biomechanical principle in plate osteosynthesis referring to the distance between the screws closest to the fracture site on either side of the fracture. This parameter directly influences the stiffness and failure characteristics of the bone-implant construct. Longer working lengths create more flexible constructs that allow controlled motion at the fracture site, promoting callus formation, while shorter working lengths create stiffer constructs with less motion but higher stress concentration. Understanding working length is crucial for optimizing fracture healing and preventing implant failure in different clinical scenarios.
Usage
Usage note: Working length should be specified in biomechanical discussions and implant selection rationale.
In Context
- "A longer working length was chosen to promote secondary bone healing through callus formation." — Surgical planning discussion
- "The working length of 80mm provided appropriate flexibility for this diaphyseal fracture pattern." — Biomechanical analysis report