GUM Proxabrush Go-Betweens handle and refills are comfortable, easy to use, specially designed handle and brush systems to remove dental plaque from hard-to-reach places between the teeth most commonly missed by tooth brushing alone. Ideal for between natural teeth and around crowns, bridges, dental implants, and orthodontic appliances. GUM Proxabrush Go-Betweens refills have a precision manufactured brush head with unique triangular bristles that are proven to remove more dental plaque than conventional round bristles.