Dr Coll received a dental degree, DMD, at the University of Pittsburgh. Served in the US Army Dental Corps and trained in pediatric dentistry at the University of Oregon obtaining an MS in medical genetics. He has published over 20 articles in refereed journals on primary tooth pulp therapy. He chairs a workgroup at the American Academy of Pediatric Dentistry doing systematic reviews on pulp therapy. In 2020 Dr Coll was the first author of the new Primary Tooth Non-Vital Pulp Guideline of the AAPD.