The cemented hip prosthesis is one of the most frequent operations worldwide in the orthopaedic field. In these operations bone coments are used to fix artificial joints filling the free space between bone and prostheses. As an elastic zone the cement is able to buffer the forces affecting the bone. Though chemically all cements on the market are basing on the same main substance (methyl methacrylate = MMA) they differ in their physical and chemical properties. The rising number of bone cements on the market makes it difficult for the surgeon to make an appropriate choice for good clinical long-term results. The present book is a complete, detailed comparative presentation of all relevant physical and chemical properties of the bone cements on the market.