Purpose: To compare differences between restoratively projected and surgically acceptable virtual implant positions at sites identified by cylindric radiopaque markers on diagnostic templates for implant-retained mandibular overdentures using cone beam computed tomography (CBCT).
Materials And Methods: A retrospective chart audit of a CBCT database identified 77 subjects who had been imaged to assess the residual alveolar ridge in the completely edentulous mandible prior to implant placement for mandibular overdentures. Individuals had been scanned with a diagnostic template using cylindric markers to identify the restoratively derived locations and trajectories for implants.