This article was produced for ProPublica’s Local Reporting Network in partnership with The Salt Lake Tribune. The patients kept coming to the Utah oral surgeon’s office — one after another, year after ...

Root canals treat infected or damaged pulp tissue to save the tooth. Success relies on patient-specific factors—not just technical skill. Technology like microscopes and 3D imaging improves outcomes.

This article originally appeared on ProPublica. ProPublica is a Pulitzer Prize-winning investigative newsroom. Sign up for The Big Story newsletter to receive stories like this one in your inbox.

These highlights were written by the reporters and editors who worked on this story. The patients kept coming to the Utah oral surgeon’s office — one after another, year after year — with dental work ...