Fatigue properties of mix ratio bone cement as a function of monomer/polymer
Mr Martin McGrory B.Eng Engineering, undergraduate project
The mixing of acrylic bone cement for use in orthopaedic surgery has long been a process prone to wide variation in mixing procedures and hence wide variations in mechanical strengths. The hand mixing process is still used in some hospitals producing variations in quality and amounts of porosity. Vacuum mixing of bone cement seemed to be the answer to reduce porosity and hence improve bone cement strength. Another factor that may influence bone cement strength is the monomer/polymer mix ratio and this work fatigue tested various ratios of cement after vacuum mixing.
The mixing of acrylic bone cement for use in orthopaedic surgery has long been a process prone to wide variation in mixing procedures and hence wide variations in mechanical strengths. The hand mixing process is still used in some hospitals producing variations in quality and amounts of porosity. Vacuum mixing of bone cement seemed to be the answer to reduce porosity and hence improve bone cement strength. Another factor that may influence bone cement strength is the monomer/polymer mix ratio and this work fatigue tested various ratios of cement after vacuum mixing.
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