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Can Vet J. 2010 February; 51(2): 139–140.
PMCID: PMC2808280

Orthopedic quiz corner

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One of the most consistently popular features of The Canadian Veterinary Journal is the “Quiz Corner.” As “homage” to that fine feature and in a blatant attempt to cash in on its popularity, we proudly present the first “Orthopedic Quiz Corner!”

  1. A 4-month-old cocker spaniel pup is presented for acute left front limb lameness after jumping off the owner’s bed. There is pain and crepitance on flexion of the elbow. The most likely diagnosis in this case is:

    1. elbow luxation
    2. Saltar-Harris I fracture of the distal humeral physis.
    3. Saltar-Harris I fracture of the proximal humeral physis.
    4. Saltar-Harris IV fracture of the lateral humeral condyle.
    5. Saltar-Harris IV fracture of the medial humeral condyle.
  2. Why are spaniels predisposed to the above injury?

    1. decreased bone density.
    2. diminished endosteal blood supply in the distal humerus
    3. incomplete ossification between the humeral condyles
    4. b & c
    5. a & c
  3. A 6-month-old miniature poodle with a medially luxating patella that is found to be luxated on examination but can be reduced temporarily with the stifle in extension, is best described as having what grade of patellar luxation?

    1. Grade 0
    2. Grade 1
    3. Grade 2
    4. Grade 3
    5. Grade 4
  4. A 45-kg Labrador retriever with a severely comminuted femoral fracture could best be treated with what fracture fixation technique?

    1. intramedullary pin and bone plate combination
    2. intramedullary pin and cerclage wires
    3. type 2 external skeletal fixator
    4. type 1a external skeletal fixator
    5. type 1b external skeletal fixator
  5. Which of the following has NOT been implicated as a possible causative factor in canine cranial cruciate ligament rupture?

    1. tibial plateau slope
    2. proximal tibial physeal fracture before 7 to 8 months of age
    3. femoral intercondylar notch dimensions
    4. genetic predisposition
    5. high energy puppy diets
  6. A 7-kg, 9-month-old, neutered male, indoor cat is presented with an acute lameness of the right rear leg. Physical examination reveals crepitance and pain in the coxofemoral joint and radiographs demonstrate a capital physeal fracture. Which of the following has NOT been implicated as a possible predisposing factor in these fractures?

    1. obesity
    2. neutering before 6 months of age
    3. high carbohydrate diets
    4. male gender
    5. physeal dysplasia
  7. In which breeds of dogs would cast stabilization be an acceptable treatment for a distal radius and ulna fracture?

    1. German shepherd
    2. Pomeranian
    3. Italian greyhound
    4. cocker spaniel
    5. a & d
  8. Inappropriate use of cerclage wires in fracture repair can impede fracture healing by:

    1. interfering with periosteal blood supply
    2. acting as a nidus of infection
    3. producing a metal reaction
    4. producing excessive bone callus formation
    5. inhibiting osteoblast activity
  9. Loosening of external fixation pins at the bone/pin interface is the most common complication encountered with external skeletal fixation. The frequency of this problem can be reduced by:

    1. predrilling pilot holes with an appropriate-sized drill bit
    2. low speed drilling and pin insertion
    3. placement of pins through muscle tissue for added stability
    4. a & b
    5. a & c
  10. The majority of cranial cruciate ligament ruptures are the result of a degenerative process in the stifle. Consequently, the likelihood that the contralateral cruciate ligament will eventually be affected by the process is:

    1. 0% to 20%
    2. 20% to 30%
    3. 30% to 50%
    4. 50% to 70%
    5. > 70%

(See p. 207 for answers./Voir les réponses à la page 207.)

Footnotes

Use of this article is limited to a single copy for personal study. Anyone interested in obtaining reprints should contact the CVMA office ( gro.vmca-amvc@nothguorbh) for additional copies or permission to use this material elsewhere.

References

1. Harasen G. Common long bone fracture in small animal practice-part 1. Can Vet J. 2003;44:333–334. [PMC free article] [PubMed]
2. Harasen G. Patellar luxation. Can Vet J. 2006;47:817–818. [PMC free article] [PubMed]
3. Harasen G. Common long bone fracture in small animal practice — Part 2. Can Vet J. 2003;44:503–504. [PMC free article] [PubMed]
4. Harasen G. What’s new in orthopedics. Can Vet J. 2007;48:199. [PMC free article] [PubMed]
5. Harasen G. Hot off the presses! Can Vet J. 2008;49:409–410. [PMC free article] [PubMed]
6. Harasen G. 2007 meeting of the American college of veterinary surgeons. Can Vet J. 2008;49:607–608. [PMC free article] [PubMed]
7. Harasen G. Atraumatic proximal femoral physeal fractures in cats. Can Vet J. 2004;45:359–360. [PMC free article] [PubMed]
8. Piermattei DL, Flo GL, DeCamp CE. Handbook of Small Animal Orthopedics and Fracture Repair. 4th ed. St Louis, Missouri: Saunders; 2006. pp. 110–117.
9. Piermattei DL, Flo GL, DeCamp CE. Handbook of Small Animal Orthopedics and Fracture Repair. 4th ed. St Louis, Missouri: Saunders; 2006. pp. 69–94.
10. Harasen G. Cranial cruciate ligament rupture in profile: 2002–2007. Can Vet J. 2008;49:193–194. [PMC free article] [PubMed]
11. Harasen G. Latest research in orthopedics — More highlights from the 35th annual meeting of the veterinary orthopedic society. Can Vet J. 2009;50:194. [PMC free article] [PubMed]

Articles from The Canadian Veterinary Journal are provided here courtesy of Canadian Veterinary Medical Association