2018 R. Earl Robinson Periodontal Regeneration Award for the article entitled, “Periodontal regeneration compared with access flap surgery in human intra bony defects 20-year follow-up of a randomized clinical trial: tooth retention, periodontitis recurrence and costs.” - American Academy of Periodontology Foundation. This award, sponsored by the American Academy of Periodontology Foundation, is presented to the most outstanding published scientific article on periodontal regeneration in the basic or clinical sciences. The intent of the award is to encourage research in this area.