Bioelectric effect utilized a healthcare device for effective management of dental biofilms and gingivitis.

Oral healthcare is a critical condition for high quality of life. According to statistics, gingivitis is one of major diseases in the world (The Global Burden of Disease Study 2019, 3.5 billion population worldwide). Oral diseases, that initiated by a group of multispecies bacteria with diverse extracellular slime that called biofilms, are modifiable risk factors with the cancer, cardiovascular disease, chronic respiratory disease. Hence, effective management of biofilms is important. Since biofilms are comprised of extracellular matrix that inhibit drug diffusion, the traditional antibiotic treatment requires 500 -5000 times more concentration than planktonic bacterial infection. The biofilm cleaning in dentistry includes time-consuming and painful physical brushing. In this work, we have developed a new electric toothbrush in emphasis on demonstration of convenient and painless gingivitis improvement device. For the first time, the toothbrush has been integrated with an electromagnetic technology for effective biofilm removal, known for bioelectric effect (BE). Biofilms consists of electrically charged molecules that are affected by external electric fields. Thus, when an electric field is applied, it creates interruption of metabolism, reduction of enzyme activity, weakening surface attachment, and nonuniform electrolyte distribution, resulting in separation from the surface. Thus, integration of the BE on a toothbrush enables enhanced biofilm reduction. The toothbrush tested with mild gingival patient (N=40) at the department of dentistry, Ulsan University Hospital, South Korea. The patient used the BE toothbrush and non-BE toothbrush consecutively for 2 weeks in each, following their gingival index (GI) and plaque index (PI) measurement for the quantitative analysis. The results demonstrate 1.75 times more decrease of GI in BE toothbrush than the data of the non-BE device (p < 0.05). In conclusion, a new electromagnetic wave toothbrush has been successfully demonstrated especially in reduction of inflammation. Based on this work, we are going to further develop a medical device that dedicated on the treatment of inflammation.