QUESTIONS 1 of 2 1 2 Previous Next (OBQ10.39) A 45-year-old male, with a history of avascular necrosis, undergoes a total hip arthroplasty using a metal-on-metal bearing. Which of the following statements regarding the use of metal-on-metal bearings is true? QID: 3127 Type & Select Correct Answer 1 Produce lower serum metal ion concentrations than metal-on-cross linked polyethylene bearings 1% (20/3241) 2 Have a decreased volumetric wear rate compared to metal-on-ceramic bearings 12% (376/3241) 3 Have smaller wear particles compared to metal-on-cross linked polyethylene bearings 75% (2419/3241) 4 Have a higher incidence of early soft-tissue sarcoma compared to all other bearing surfaces. 7% (239/3241) 5 The wear rate significantly increases after the first year of use. 5% (173/3241) L 2 Question Complexity C Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 3 Review Tested Concept Review Full Topic This is an AAOS Self Assessment Exam (SAE) question. Orthobullets was not involved in the editorial process and does not have the ability to alter the question. If you prefer to hide SAE questions, simply turn them off in your Learning Goals. (SAE07HK.55) Based on the type of articulation shown in Figure 32, wear is not affected by which of the following factors? QID: 6015 FIGURES: A Type & Select Correct Answer 1 Radial mismatch of the femoral head to the acetabular component 8% (59/726) 2 Sphericity of the bearings 9% (63/726) 3 Surface finish of the articulation 6% (42/726) 4 Carbon content of the metal-on-metal bearing 20% (142/726) 5 Head-to-neck ratio 58% (418/726) L 3 Question Complexity E Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 5 Review Tested Concept Review Full Topic