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CME questions based on the Mini-Symposium on “What's New in Hip Replacement?”
Current Orthopaedics (2008) 22, 233e235
available at www.sciencedirect.com
journal homepage: www.elsevier.com/locate/cuor
CME SECTION CME questions based on the Mini-Symposium on ‘‘What’s New in Hip Replacement?’’ The following series of questions are based on the MiniSymposium on ‘‘What’s New in Hip Replacement?’’ Please read the articles in the Mini-Symposium carefully and then complete the self assessment questionnaire by filling in the square corresponding to your response to each multiple-choice question. After completing the questionnaire, either post or fax the answer page to the Current Orthopaedics Editorial Office at the address at the bottom of the RESPONSE sheet. Please photocopy this page if you wish to keep your copy of Current Orthopaedics intact. Replies received before the next issue of Current Orthopaedics is published will be marked and those reaching an adequate standard will qualify for three external CME points. You will be notified of your marks and a CME certificate will be despatched for your records.
Questions 1. Which of the following manoeuvres is least satisfactory for managing a patient whose hip is ‘slack’ on the table and is thought to be at risk of postoperative dislocation? A. B. C. D. E.
Ensure accurate cup version Increase the offset Use a larger head Use a longer neck length Use a PLAD
3. Approximately how many different total hip implants in clinical use in the UK have results published in peer reviewed journals? A. B. C. D. E.
5 10 20 30 50
4. Which group of patients seems to have a particularly high revision rate in the first postoperative year after resurfacing hip replacement? A. B. C. D. E.
Patients under 40 years of age, both sexes Males under 55 Females under 55 Males over 55 Females over 55
5. Which of the following is the most wettable of currently used bearing surfaces in total hip replacement? A. B. C. D. E.
Ceramic Cobalt chrome molybdenum Stainless steel Highly cross linked UHMWPE Ultra high molecular weight polyethylene
2. Approximately how many new designs of total hip replacement have been introduced in the UK over the last 5 years?
6. Which of the following types of lubrication does not occur in human joints?
A. B. C. D. E.
A. B. C. D. E.
5 10 20 30 50
0268-0890/$ - see front matter doi:10.1016/j.cuor.2008.07.001
Boundary Hydrodynamic Hydrostatic Squeeze film Weeping
234
CME SECTION
7. What type of wear typically occurs at interfaces with high loading but minimal movement? A. B. C. D. E.
Abrasive Adhesive Corrosive Fatigue Fretting
10. According to Livermore, which head size gives the best compromise between penetration and volumetric wear? A. B. C. D. E.
22.25 mm 25 mm 28 mm 32 mm 35 mm
8. What is the numerical difference in wear particles produced by metal on metal bearing surfaces compared to metal on UHMWPE?
11. Which of the following factors does not affect the primary arc range of a total hip replacement?
A. B. C. D. E.
A. B. C. D. E.
No significant difference MOM 10x more particles MOM 200x more particles MOM 103 more particles MOM 105 more particles
9. Which of the following factors is inversely related to the volume of material eroded from an articulating pair of surfaces? A. B. C. D. E.
The The The The The
normal load sliding distance hardness of the softer material Archard constant surface roughness of the harder material
The cup rim design The excursion distance The neck taper Variation of the neck size for any given head size Variation of head size for any given neck size
12. What form of lubrication is thought to occur advantageously in metal-on-metal articulations? A. B. C. D. E.
Fluid film lubrication Hydrodynamic Hydrostatic Squeeze film Weeping
CME SECTION
235
Please fill in your answers to the CME questionnaire above in the response section provided below. A return address and fax number is given at the bottom of the page. .......................................................................................................................................................
Responses Please shade in the square for the correct answer. 1
A
B
C
D
E
2
A
B
C
D
E
3
A
B
C
D
E
4
A
B
C
D
E
5
A
B
C
D
E
6
A
B
C
D
E
7
A
B
C
D
E
8
A
B
C
D
E
9
A
B
C
D
E
10
A
B
C
D
E
11
A
B
C
D
E
12
A
B
C
D
E
Your details (Print clearly) NAME................................................................................................................................................ ADDRESS ............................................................................................................................................ FAX NO ............................................................................................................................................. EMAIL ...............................................................................................................................................
RETURN THE COMPLETED RESPONSE FORM by fax to þ44-113-392-3290, or by post to CME, Current Orthopaedics, Academic Department of Orthopaedic Surgery, ‘‘A’’ Floor Clarendon Wing, Leeds General Infirmary, Great George Street, Leeds LS1 3EX, UK.
available at www.sciencedirect.com
journal homepage: www.elsevier.com/locate/cuor
CME SECTION CME questions based on the Mini-Symposium on ‘‘What’s New in Hip Replacement?’’ The following series of questions are based on the MiniSymposium on ‘‘What’s New in Hip Replacement?’’ Please read the articles in the Mini-Symposium carefully and then complete the self assessment questionnaire by filling in the square corresponding to your response to each multiple-choice question. After completing the questionnaire, either post or fax the answer page to the Current Orthopaedics Editorial Office at the address at the bottom of the RESPONSE sheet. Please photocopy this page if you wish to keep your copy of Current Orthopaedics intact. Replies received before the next issue of Current Orthopaedics is published will be marked and those reaching an adequate standard will qualify for three external CME points. You will be notified of your marks and a CME certificate will be despatched for your records.
Questions 1. Which of the following manoeuvres is least satisfactory for managing a patient whose hip is ‘slack’ on the table and is thought to be at risk of postoperative dislocation? A. B. C. D. E.
Ensure accurate cup version Increase the offset Use a larger head Use a longer neck length Use a PLAD
3. Approximately how many different total hip implants in clinical use in the UK have results published in peer reviewed journals? A. B. C. D. E.
5 10 20 30 50
4. Which group of patients seems to have a particularly high revision rate in the first postoperative year after resurfacing hip replacement? A. B. C. D. E.
Patients under 40 years of age, both sexes Males under 55 Females under 55 Males over 55 Females over 55
5. Which of the following is the most wettable of currently used bearing surfaces in total hip replacement? A. B. C. D. E.
Ceramic Cobalt chrome molybdenum Stainless steel Highly cross linked UHMWPE Ultra high molecular weight polyethylene
2. Approximately how many new designs of total hip replacement have been introduced in the UK over the last 5 years?
6. Which of the following types of lubrication does not occur in human joints?
A. B. C. D. E.
A. B. C. D. E.
5 10 20 30 50
0268-0890/$ - see front matter doi:10.1016/j.cuor.2008.07.001
Boundary Hydrodynamic Hydrostatic Squeeze film Weeping
234
CME SECTION
7. What type of wear typically occurs at interfaces with high loading but minimal movement? A. B. C. D. E.
Abrasive Adhesive Corrosive Fatigue Fretting
10. According to Livermore, which head size gives the best compromise between penetration and volumetric wear? A. B. C. D. E.
22.25 mm 25 mm 28 mm 32 mm 35 mm
8. What is the numerical difference in wear particles produced by metal on metal bearing surfaces compared to metal on UHMWPE?
11. Which of the following factors does not affect the primary arc range of a total hip replacement?
A. B. C. D. E.
A. B. C. D. E.
No significant difference MOM 10x more particles MOM 200x more particles MOM 103 more particles MOM 105 more particles
9. Which of the following factors is inversely related to the volume of material eroded from an articulating pair of surfaces? A. B. C. D. E.
The The The The The
normal load sliding distance hardness of the softer material Archard constant surface roughness of the harder material
The cup rim design The excursion distance The neck taper Variation of the neck size for any given head size Variation of head size for any given neck size
12. What form of lubrication is thought to occur advantageously in metal-on-metal articulations? A. B. C. D. E.
Fluid film lubrication Hydrodynamic Hydrostatic Squeeze film Weeping
CME SECTION
235
Please fill in your answers to the CME questionnaire above in the response section provided below. A return address and fax number is given at the bottom of the page. .......................................................................................................................................................
Responses Please shade in the square for the correct answer. 1
A
B
C
D
E
2
A
B
C
D
E
3
A
B
C
D
E
4
A
B
C
D
E
5
A
B
C
D
E
6
A
B
C
D
E
7
A
B
C
D
E
8
A
B
C
D
E
9
A
B
C
D
E
10
A
B
C
D
E
11
A
B
C
D
E
12
A
B
C
D
E
Your details (Print clearly) NAME................................................................................................................................................ ADDRESS ............................................................................................................................................ FAX NO ............................................................................................................................................. EMAIL ...............................................................................................................................................
RETURN THE COMPLETED RESPONSE FORM by fax to þ44-113-392-3290, or by post to CME, Current Orthopaedics, Academic Department of Orthopaedic Surgery, ‘‘A’’ Floor Clarendon Wing, Leeds General Infirmary, Great George Street, Leeds LS1 3EX, UK.