Clinical Trials: Overview
Clinical Trials
Study Designs in Epidemiology
Community Based Intervention
Types of Biopharmaceutical Studies: Controlled and Non-Controlled Approaches
Bias in Epidemiological Studies
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Updated: Sep 20, 2025

Oral Biofilm Sampling for Microbiome Analysis in Healthy Children
Published on: December 31, 2017
Francisco J Ramos-Gomez1,2, Molly A Martin3, Suchitra S Nelson4
1Department of Pediatric Dentistry, University of California, Los Angeles, Los Angeles, CA, United States.
The COVID-19 pandemic disrupted clinical trials, especially in dentistry, due to high transmission risks. This study details challenges faced by oral health researchers to prepare for future public health crises.
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