Sir, I have followed, with interest, the recent correspondence in the BDJ on ozone therapy in dentistry. The problem, cited both by the Cochrane Systematic Review1 and the review by NICE2 has been a lack of robust evidence. I was therefore attracted to the recent letter Missing the point (BDJ 2006; 200: 305) in the hope that newly published evidence, not available to the above reviews, would be quoted. However, I was disappointed, as five of the seven references were abstracts from the programmes for research meetings, rather than full papers published in peer-reviewed journals. These abstracts were dated 2003 and 2004, so I would have thought that there was sufficient time for the research to have been written up, submitted and published, despite the delays always encountered in the review and publication process. One is given to wonder, therefore, whether these abstracts failed to get into the review process or were simply not considered to be worth writing up as full papers. The dental research world is waiting for more evidence, of good quality, into a treatment (ozone therapy), which could be revolutionary. It surely is beholden to those researching the field to provide this evidence at the earliest possible opportunity.