Comparison Between the Dentapen and Vibraject

The needle was advanced into the tissue until it was estimated to be over the root apex while remaining parallel to the tooth's long axis. The Vibraject was activated after aspiration to deposit the solution slowly at approximately 50 seconds. Following cartridge deposition, the operator adjusted the participant to an upright seated position

The needle was advanced into the tissue until it was estimated to be over the root apex while remaining parallel to the tooth's long axis (needle placement). The Dentapen was activated after aspiration to deposit the solution at a medium rate (1 mL/60 s) using the ramp-up mode. Following cartridge deposition, the operator adjusted the participant to an upright seated position