I read Dr. Grippos letter with interest and, as always, agree with some points and disagree with others. We have had these discussions before, and I look forward one day to meeting him. However, he clearly illustrates the difference in emphasis placed on understanding of tooth wear and acid erosion in Europe and by some in North America.
Back in 1999, after a sabbatical to Seattle, I wrote an article with Dr. Keith Phillips on the difference in perspectives on the interpretations of tooth wear.1 The aim of that article was to review how different countries interpret tooth wear. While the United Kingdom often views most things in sympathy with North America on the issue of tooth wear and erosion, there is overwhelming consensus over the term "erosion." In some other European countries, the focus on erosion is even more embedded in common language. These differences in emphasis and opinion are healthy and should be encouraged.
Our knowledge base on the causes of cervical wear, acid erosion (or simply erosion), attrition and abrasion is at an early stage. We simply do not understand nor do we know the absolute causes involved with these processes, and are at a stage in our development that is equivalent to that of dental caries 30 years ago. Research in this area is increasing and, in time, we will know more and may be able to show convincingly what causes tooth wear.