Comparative Histological Studies on Existing and Not Existing HA Granules in the Same Hip in a Modified Cementing Technique Using HA Granules

We evaluated the differences of histological findings of the retrieved specimens from the different areas in the same hip with interposing HA granules and without interposing HA granules between the bone and bone cement interface. In the area existing HA, bone ingrowth into the spaces of HA granules was very dense and a thick bone layer with HA granules contacted around the bone cement. In the area not-existing HA, bone formation at the base was seen poorly and bone formation at the area adjacent to the bone cement was not seen.