Microbial contamination and plaque scores of nanogold‐coated toothbrush

Objective The study aimed to evaluate the microbial contamination and plaque scores of nanogold‐coated and uncoated toothbrushes. Methods This study was designed as a single‐centre, parallel, examiner‐blinded, randomized, two‐group clinical trial. Eighty‐four participants were enrolled and randomly assigned to receive either a nanogold or uncoated toothbrush. Basic periodontal therapy was performed for all the recruited subjects, and plaque scores of zero were considered baseline values. All participants were instructed to follow a twice‐daily brushing regimen without dentifrice and to refrain from other oral hygiene care during the one‐week study period. Plaque levels were assessed after one week using the Turesky modification of the Quigley‐Hein Plaque Index (TMQHPI). The bristles were tested for microbial contamination by viable cell counting. The recorded data were statistically analysed, and a P‐value of