MedicalResearch.com Interview with:  Donna Warren Morris, RDH, Med Professor, Dean's Academy of Distinguished Teaching Scholars Houston, TX 77054 Medical Research: What are the main findings of the study? Answer: Power toothbrushes can harbor microorganisms that have been shown to cause disease and infections. A solid-head design was found to have less growth of microorganisms than two others with hollow head designs. (more…)