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Review Question - QID 51

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QID 51 (Type "51" in App Search)
A 35-year-old male sustains the fracture seen in Figures A and B. Which of the following substances has been shown to result in the least radiographic subsidence when combined with open reduction and internal fixation?
  • A
  • B

Cancellous allograft bone chips

7%

74/1016

Autograft iliac crest

16%

167/1016

Femoral intramedullary reamings

2%

25/1016

Calcium phosphate cement

68%

688/1016

Calcium sulfate cement

6%

58/1016

  • A
  • B

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Figures A and B show a plateau fracture with a lateral split and depression of the articular surface. In treating tibial plateau fractures, calcium phosphate has been shown to have the least amount of articular subsidence on follow-up examinations due to its high compressive strength.

The study by Lobenhoffer et al noted improved radiographic outcomes and earlier weightbearing with usage of calcium phosphate cement. Welch and Zhang reproduced tibial plateau fractures in goats and compared cancellous autograft to calcium phosphate cement augmentation. At 24 hours, four of five specimens treated with autograft had subsidence of the fragment. Only two specimens from limbs treated with cement showed minimal subsidence; the remaining were congruent.

Yetkinler’s study compared cement to no cement treatment in a model of depressed plateau fractures. Calcium phosphate cement of high compressive strength provided equivalent or better stability than conventional open reduction
and internal fixation with either auto/allograft bone which had both a lower compressive strength and reduced mechanical stability.

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