QUESTIONS 1 of 5 1 2 3 4 5 Previous Next 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. (SAE13BS.70) How are free radicals removed from highly cross-linked polyethylene? QID: 8309 Type & Select Correct Answer 1 Low-dose irradiation 14% (113/807) 2 High-dose irradiation 14% (112/807) 3 Oxidation 17% (137/807) 4 Thermal processing 54% (436/807) L 4 Question Complexity D Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 4 Review Tested Concept Review Full Topic Sorry, this question is for PEAK Premium Subscribers only Upgrade to PEAK (OBQ09.108) Polyethylene gamma irradiation in nitrogen gas results in which of the following? QID: 2921 Type & Select Correct Answer 1 Annealing 21% (657/3119) 2 Gas plasma 3% (107/3119) 3 Uncross-linking 8% (259/3119) 4 Free radicals 66% (2054/3119) 5 Remelting 1% (30/3119) L 2 Question Complexity A Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 4 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.40) Sterilization of ultra-high molecular weight polyethylene by gamma irradiation in air will degrade its wear performance because of QID: 6000 Type & Select Correct Answer 1 oxidation. 88% (544/620) 2 melting. 1% (8/620) 3 cross-linking. 8% (51/620) 4 corrosion. 1% (6/620) 5 creep. 1% (7/620) L 1 Question Complexity E Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 1 Review Tested Concept Review Full Topic (OBQ04.222) In evaluating methods of polyetheylene sterilization for hip arthroplasty, gamma-irradiation in air compared to irradiation in an inert substance results in which of the following? QID: 1327 Type & Select Correct Answer 1 No difference in regards to outcome 2% (51/2898) 2 Higher rate of cross-linking when irradiated in air 3% (93/2898) 3 Lower rate of oxidation when irradiated in air 2% (51/2898) 4 Accelerated wear and failure when irradiated in air 92% (2657/2898) 5 Better wear resistance and longevity when irradiated in air 1% (34/2898) L 1 Question Complexity A Question Importance Select Answer to see Preferred Response SUBMIT RESPONSE 4 Review Tested Concept Review Full Topic