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The Journal of Bone and Joint Surgery 78:793 (1996)
© 1996 The Journal of Bone and Joint Surgery, Inc.

Correspondence

Correspondence

Valdemar Surin, M.D., Ph.D., Stuart Goodman, M.D., Ph.D., Yong Song, M.D., Gunther Knoblich, Phil Huie, M.S. and Donald Regula, M.D.

TO THE EDITOR:

In "Tissue Ingrowth and Differentiation in the Bone-Harvest Chamber in the Presence of Cobalt-Chromium-Alloy and High-Density-Polyethylene Particles" (77-A: 1025-1035, July 1995), Goodman et al. thoroughly studied the effect of polyethylene particles on the net bone formation in a bone-harvest chamber. I am, however, uneasy with their identification of the polyethylene product that they used in their experiments. They characterized it as "high-density-polyethylene particles ... highly crystalline and ... having a specific gravity of 0.95."

First, I am uncertain what kind of polyethylene they used in their experiments. The current material of choice for orthopaedic implants, ultra-high molecular weight polyethylene with a molecular weight of two to six million, has been incorrectly called high-density polyethylene by some authors2. It is unclear whether . . . [Full Text of this Article]


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