INFRARED STUDY OF THE INTERACTION OF ACRYLIC BONE-CEMENT WITH BONE-STRUCTURE INVITRO

Infrared Spectroscopy was used for the characterization of some commercial bone cements and investigation of their inter-action with compact bone in vitro. The IR spectra of the cements and their mixtures with bone powder were recorded at various periods ranging from day one to 8 weeks. The quantitative analysis of the IR spectra of the mixtures provided a strong evidence that a certain reaction takes place between the acrylic resin and bone powder. It was found that the rate of reaction depends on the concentration of the bone powder and time. In any event, the rate of reaction showed a maximum value at 45-days for all concentrations. It was concluded that, a bond is formed between the cement and the bone powder, and this bond is not perfect.