SDI Limited is engaged in the manufacture and distribution of amalgam and composite restorative materials, other dental materials, and product research and development. The Company manufactures dental restorative products, tooth whitening systems and small dental equipment for sale to dental distributors, dental dealers and dentists around the world. The Company's segments include SDI Australia segment, which includes SDI Limited; SDI Europe segment, which includes SDI Dental Limited (Ireland), SDI GmbH (Germany) and SDI Italy S.r.l (Italy); SDI USA segment, which includes SDI (North America), Inc.; SDI Brazil segment, which includes SDI Brasil Industria e Comercio Ltda, and other segments. The Company's product categories include alloys, etchants, adhesives, glass ionomers, sealants, composites, cements, tooth whitening, equipment, accessories and Riva Star. Its products are distributed through distributors and retailers in over 100 countries throughout the world.