Biomaterials
A 45-year-old active patient with primary osteoarthritis undergoes total hip arthroplasty. The surgeon recommends a ceramic-on-ceramic bearing using BIOLOX Delta components to maximize implant longevity. The patient asks about the advantages and risks of ceramic bearings compared to metal-on-polyethylene. You explain that modern ceramic composites offer ultra-low wear rates but carry specific complications including squeaking and fracture risk. Regarding ceramic bearing surfaces in arthroplasty:
Mark each as TRUE or FALSE
BIOLOX Delta is an alumina matrix composite consisting of 82% alumina (Al2O3), 17% zirconia platelet...
Ceramic-on-ceramic bearings achieve wear rates of less than 0.005 mm per year, approximately 10-fold...
Pure zirconia femoral heads were withdrawn from clinical use due to in vivo phase transformation fro...
Squeaking in ceramic-on-ceramic bearings occurs in 1-8% of cases, is usually benign and resolves spo...
The elastic modulus of ceramic bearings is approximately 20-25 GPa, similar to cortical bone, which ...
Answer the questions to see explanations
Click T (True) or F (False) for each option