Aims:This study aimed to investigate the morphology of the palate, palatal rugae pattern, and dental arch form in patients with schizophrenia. Methods and results:An observational case-control study was designed following the STROBE statement and checklist. The sample consisted of 132 patients (39 diagnosed with schizophrenia and 93 controls). Dental casts of the patients were classified based on the pattern of their palatal rugae, their dental arch form, and the area of their palate. The palatal rugae in patients with schizophrenia had a more random distribution and shape compared to the control group (P = .027). Oval dental arches were the most prevalent in both groups (P = .473). The palate area was slightly larger in the control group (3.2318 ± 0.549 mm 2 ) compared with the group of patients with schizophrenia (3.060 ± 0.470 mm 2 ) (P = .090). Conclusion:Palatal rugae pattern may feature as a potential minor physical anomaly for schizophrenia. Additional studies with alternative sampling and classification systems are necessary to understand this finding and its applications in practice. K E Y W O R D Smorphology, palatal rugae, schizophrenia

Aims The aim of this study was to compare individuals with and without schizophrenia through the characteristics of the palate, such as width, length, depth, palate shape, and upper dental arch shape. Methods and results The sample was divided into one case group (n = 45) and two control groups (n = 90; 45 individuals each group). Groups were paired by variables: sex, age, and malocclusion type. All analyses were performed on upper dental arch plaster models. All individuals were male and the mean age was 28.56 (SD: 7.82) years. The frequency of the malocclusion type observed was 54.1% (Class I), 22.2% (Class II), and 23.7% (Class III). Statistically significant difference was observed between the case and control groups for the variables palate shape (P = .004) and upper dental arch shape (P = .003). The case group had a higher frequency of the deep or grooved palate shape (57.8%) and parabolic dental arch shape (48.9%). There was no statistically significant difference for the palate width, length, and depth (P > .05). Conclusions There was an evidence that the deep or grooved palate shape and parabolic dental arch shape are morphological characteristics of the palate in men with schizophrenia.