Author's correction note:

Research article Br Dent J 2021; DOI: 10.1038/s41415-021-3081-1.

When initially published, there were errors in the 'Materials and method' section and Table 1. In the methods section, 'This study recruited 28 obese volunteer participants with a Body Mass Index (BMI) >30 from the wider community in Dunedin, New Zealand' should have read 'This study recruited 28 obese volunteer participants with a Body Mass Index (BMI) >35 from the wider community in Dunedin, New Zealand'. In Table 1, 'BMI >30' should have read 'BMI >35'.

In addition, the authors wish to include the following ethics declaration: 'The authors note that, as anticipated by the ethics application, patent protection in the device was sought, with that being done through a new, non-active, holding company in which the research collaborators had proportionate ownership interests'.

The authors apologise for any inconvenience caused.