“…The understanding, definition and reporting of bruxism is one notable example of an outcome measure in oral health that Charles Kettering may have considered as 'a problem half-solved', as our colleagues have rightly pointed out in their recent letter to the editor (de Figueiredo et al, 2022). The authors stressed the importance of future studies differentiating between sleep or awake bruxism and standardising its diagnosis as 'possible', 'probable' or 'definite' based on the presence of self-reporting and/or clinical inspection (Lobbezoo et al, 2018).…”