Arthroplasty Quiz

This exam must be completed in 10 minutes. Click here to start the exam

1. When comparing total knee replacement (TKR) with Unicompartmental Knee Replacement which of the following statement is untrue?

Longevity of UKR is equal to TKR.
Tibial resection made at right angles to the mechanical axis of the tibia, similar to that of total knee arthroplasty, is rarely suitable for UKA due to the intra- articular obliquities of the medial compartment.
UKA surgical procedure can correct alignment only within the joint
UKA differs from TKA in that alignment can be corrected only to the normal tension of the knee ligaments.

(Question 1 of 10)

2. What is true while doing anterior referencing for femoral cuts

Flexion gap is constant but there is danger of notching the anterior femoral cortex
Over resection will lead to loose extension gap
Under resection will cause flexion instability
Size of the component is based on the amount of femoral condyles that is removed

(Question 2 of 10)

3. Ultra- high molecular weight polyethylene is defined as polyethylene with an average molecular weight greater than __ million g/mol :

1
10
7
3

(Question 3 of 10)

4. Which of the following statements regarding the valgus knee is false?

In valgus knees lateral soft tissue structures including LCL, ITB and lateral capsule contract while medial tissues become stretched
Lateral femoral condyle has often been shown to be dysplastic in valgus deformities.
Most of the boney deficits occurs on the femoral side
While balancing a valgus knee, most of the release is performed from the lateral tibial condyle.

(Question 4 of 10)

5. All of the following are considered high risk factors for dislocation in THR except:

Posterior surgical exposure
Impingement of prosthetic neck on the acetabular component.
Use of 22mm heads.
AVN as primary pathology
Fracture Neck Femur as the primary pathology

(Question 5 of 10)

6. Which of the statements regarding Total Hip Arthroplasty in young patients is false:?

The survival rate of artificial joints in patients younger than fifty years of age is approximately 80% after ten years or more, regardless of the fixation tech- nique and bearing combination
Higher patient activity results in higher wear rates
In chronological order, the categorical factors limiting the function and longevity of a total hip prosthesis are the osteolysis (often associated with wear of the bearing), , fixation of the implant to the bone, surgical technique, fatigue failure of the
Studies of young patients have demonstrated a relationship between the amount of wear and the age of the patient, the revision rate, osteolysis and aseptic loosening.

(Question 6 of 10)

7. What is not true regarding difficult exposure of the knee?

During lateral dissection, often the popliteus insertion and fibular collateral ligaments need to be released at their insertion.
When exposing the stiff or ankylosed knee there is a higher risk of avulsing the patellar ligament attached to the tibial tubercle
d. For ankylosed knees, In addition to standard relesae – which includes medial dissection around the semimmebranous bursae, excision of fat pad and the lateral release of patella, one should expose the lateral tibial plateau, remove scar and elevate the
When mobilizing the patella it is important to perform the lateral release and improve the external rotation of the tibia so that the patella can be subluxated laterally rather than everted

(Question 7 of 10)

8. Which of the following is not a relative indication for preferentially using PS(Posterior Substituting) type of knee over CR(Cruciate Retaining) Knees

Post patellectomy patients.
Patients suffering from RA
Fixed varus deformity greater than 10 degrees
Posterior instability

(Question 8 of 10)

9. According to Paprosky classification for femoral defects a defect characterized by extensive loss of metaphyseal bone with a completely intact diaphysis will be classified as:

II
IIIA
I
IIIB

(Question 9 of 10)

10. The most commonly approach used for revision hip Arthroplasty is:

Watson Jones Approach
Anterior
Anterolateral
Posterior

(Question 10 of 10)

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Comments

sujitortho says

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excellent exam, i like the questions very much…
I just appeared it as such in morning without any preparation, but when i saw the questions i felt quite exciting..
appreciate the work ….
Sagnik Biswas says

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Taking the quiz!
Julio Samper says

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Thanks, I am ready to read the questions.
I will try to answer all.
Julio Samper says

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Gracias por la información que recibimos en cada correo.
Es muy importante para la actualización en ortopedia.
Estoy listo para responder en la mejor forma el Quiz.
HUMA says

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better luck next tm
Orthopaedic Principles says

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The winners for arthroplasty Quiz: Dr Sharath, Dr Rudra, Dr Rejith
DR ALI MOHAMMED P says

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Good….
dr. aljebali says

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interesting

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