The Asia-Pacific market includes Japan, South Korea, and Australia. In 2007, the combined Asia-Pacific market for dental bone graft substitutes and other biomaterials was valued at nearly US$60.1 million. The market is expected to grow at a double digit rate over the forecast period, driven by the market for dental implants. Autografts account for an unusually large percentage of dental bone graft substitute materials used in the Asia-Pacific region because allograft and xenograft products are not approved for use in Japan. In addition, non-resorbable synthetic membranes are far more popular in the Asia-Pacific region than in Europe or the U.S. By 2014, the combined market is expected to reach nearly US$250 million.