Principle of absolute stability

Principle of absolute stability Suthorn Bavonratanavech M.D Bumrungrad Hospital Out come - Understand the definition of absolute stability & its effect on fracture healing - Understand the mechanical & biological requirements to achieve absolute stability - Understand clinical indications for absolute stability Definition • Rigidity : ability of the implant to withstand deformation • Stability : lack of motion between fracture fragments Stability • Stability is a spectrum from zero (absolute) to instability • Absolute stability : no movement between the fracture fragments • Relative stability : some motion between the fracture fragments Absolute stability - Effective abolish of fracture site movement - Reduces the strain at the fracture site, such that external callus will not form… Absolute Stability : How? No motion between fracture surfaces under functional load Absolute stability Anatomic reduction Absolute stability Anatomic reduction maximal friction Absolute stability Anatomic reduction maximal friction Interfragmentary compression ... ability of the implant to withstand deformation • Stability : lack of motion between fracture fragments Stability • Stability is a spectrum from zero (absolute) to instability • Absolute stability. .. form… Absolute Stability : How? No motion between fracture surfaces under functional load Absolute stability Anatomic reduction Absolute stability Anatomic reduction maximal friction Absolute stability. .. definition of absolute stability & its effect on fracture healing - Understand the mechanical & biological requirements to achieve absolute stability - Understand clinical indications for absolute stability