British Society of Periodontology: More research is published globally on periodontology than any of the dental sciences; periodontal diseases have both an oral and general health impact and the profession relies on high quality clinical studies to inform our understanding of these important disease processes. The British Society of Periodontology is pleased to support the AllTrials campaign to ensure transparency in trial registration and the reporting of results, to the benefit of our patients who suffer from these debilitating conditions.