Table 2 Themes and sub-themes across interviews/focus groups with dental team members and parents and dental self-reported diaries related to the theoretical framework of acceptability [18]

1. Integration within the dental practice

1.1 “Strong Teeth” intervention viewed as a “friendly chat.”

1.2 Providing a comfortable environment

1.3 A need to involve the wider dental team

2. Incorporating the Oral-B Electric toothbrush

2.1 Toothbrushing impact on the wider family

2.2 Transition of electric toothbrush difficulties

2.3 Oral-B electric toothbrush makes brushing “fun.”

2.4 Costing of toothbrush products

2.5 The Oral-B electric toothbrush is “Easier to navigate.”

2.6 The electric toothbrush is a “next step” from manual/battery toothbrushes

3. “Strong Teeth” facilitating discussions and demonstrations

3.1 Resources create conversations

3.2 Toothbrushing demonstration should be “mandatory.”

3.3 Passing on oral health information to the wider family

3.4 Number of leaflets given varied

3.5 Resources provide structure

3.6 Resources provide “support.”

4. The practicality of the Disney Magic Timer app

4.1 App involves the siblings

4.2 App impacts routine

4.3 Internet access is needed to run the App

4.4 The practicality of devices in bathrooms