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Review Question - QID 1193

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QID 1193 (Type "1193" in App Search)
A 27-year-old male is involved in a motor vehicle accident and sustains the injury shown in Figures A through E. The articular surface is depressed 2 mm while there is 3 mm of condylar widening. Valgus instability of the knee is noted. Which of the following is most important to long-term success in surgical treatment of this case?
  • A
  • B
  • C
  • D
  • E

Restoration of joint stability

62%

1066/1710

Repair of associated meniscal pathology

3%

46/1710

Surgical fixation within 48 hours of injury

0%

7/1710

Correction of the articular depression

27%

465/1710

Tibial condylar diastasis < 3 mm

7%

116/1710

  • A
  • B
  • C
  • D
  • E

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The clinical presentation and imaging studies are consistent with a tibial plateau fracture. Restoration of joint stability has been shown to be the strongest predictor of long term outcomes.

Honkonen reviewed 131 tibial condyle fractures and determined that articular stepoff <3mm and tibial widening <5mm did not negatively effect outcomes. In contrast, 70% of knees with moderate to severe malalignment went on to functionally unacceptable outcomes. They suggested operative fixation for all medial uni and bicondylar fractures, any lateral fractures with >5 degrees of valgus tilt, >3mm of articular depression, >5mm of condylar widening, or >5 degrees of valgus malalignment.

In the Marsh et al JAAOS symposium review, the authors noted that fractures with up to 10mm of articular depression and joint stability obtained acceptable functional outcomes. They also cited a 20 year follow-up which indicated that articular step-off alone was not a predictor of poor long-term results. More importantly, when instability is present with other factors, including step-off and central depression, poor results followed.

Illustrations A and B show the intraoperative films. Illustration C reviews the Schatzker classification system.

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