Flexible plate fixation of bone fractures
A bone plate and bone surface technology, applied in the field of elastically fixed bone plate, can solve problems such as implant fracture, hindering fracture healing, and delaying
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example 1
[0117] summary : The high stiffness of the locking plate structure can lead to iatrogenic fractures and implant fatigue. In contrast, impact damping resulting from elastic fixation is a major engineering strategy for improving the durability of load-bearing structures subjected to long-term dynamic loads. This example evaluates the impact damping provided by a "dynamic" locking plate design in which the locking screw holes are resiliently suspended within a silicone envelope on the inside of the locking plate.
[0118] In a biomechanical study, impact damping was evaluated against three different fixation structures applied to bridge the 10 mm fracture gap of the femoral shaft substitute: standard locking plate, dynamic locking plate and Ilizarov ring retainer. First, the three fixation structures were characterized by determining their axial stiffness. Subsequently, these structures were subjected to a series of axial shock loads to quantify the damping to force transmiss...
example 2
[0139] summary : Symmetrical axial dynamization of locking plate constructs using distal cortical locking ("FCL") screws was found to significantly increase the speed and strength of fracture healing. Because the FCL derives dynamization from flexure of the elastic screw shaft, it cannot be effectively scaled to the short screws required for fractures in small diameter bones. To address this scaling limitation, this biomechanical study evaluates a novel dynamic locking plate that derives a symmetric axial direction independent of the length of the locking screw by elastically suspending the locking hole within the plate being used. Motorized.
[0140] Standard locked (“standard”) plate configurations and dynamically locked (“dynamic”) plate configurations were examined in a diaphysis bridging plate model of the femoral shaft to determine the amount and symmetry of interfragmentary movement in response to axial loading, and in Evaluation of structural stiffness under axial l...
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