Table 1 Development of the research question based on PICOS

Population

Adult patients diagnosed as bruxers (by medical questionnaire and/or clinical examination and/or polysomnography)

Intervention

Analysis of imaging examination (2D or 3D): panoramic radiograph or cone beam computed tomography

Comparison

Density or volume of mandibular bone, without regard to the region of interest considered

Outcome

Evaluation of a difference in the volume or density of mandibular bone

Study type

Randomized or non-randomized clinical trials and observational studies (cross-sectional and longitudinal, retrospective or prospective)