NCT04430387.

Study name	Evaluation of impact on environmental spatter using different isolation methods during hygiene appointment among pediatric patients
Methods	Randomised controlled trial ‐ single blinded "The image of the spots of fluorescence from the spatter collected will be captured using a digital camera with an amber‐colored lens cover. The image will be processed by a digital imaging software to get the number of the spots on each mask and film. The number of fluorescent spots is recorded to determine the amount of spatter produced."
Participants	Children from 4 to 15 years age who need dental prophylaxis or restorative procedure not requiring sedation or nitrous oxide
Interventions	Group 1 ‐ saliva ejector; Group 2 ‐ high‐volume evacuator (HVE); Group 3 ‐ DryShield
Outcomes	To collect, measure, and assess the environmental spatter produced during dental appointments under different isolation methods used in pediatric dentistry
Starting date	11 June 2020
Contact information	Contact: Di I Wu, The University of Texas Health Science Center, Houston, USA, Phone: 7135008220 E‐mail: di.wu@uth.tmc.edu
Notes	Overall trial end date: February 2022