In producing this ninth edition of Applied Dental Materials we have updated the text in both content and appearance. We hope that the book will remain helpful to students and teachers of the science of dental materials alike by remaining true to the core principles and developing them into a more comprehensive text which covers a wide spectrum of materials falling within the scope of ‘dental materials’. Hence, there are more references to practical issues like handling and clinical performance of materials, whilst maintaining a strong link to quality issues encompassed within newly developed ISO standards. Some areas, such as adhesion, ceramics, light activation technology, CAD-CAM have been developed and expanded significantly from the eighth edition, reflecting significant changes or developments in these areas. There is a new chapter on endodontic materials. All areas have benefited from a fresh approach to the use of drawings and photographs including the use of colour for the first time