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European Journal of Psychiatry
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Vol. 38. Issue 1.
(January - March 2024)
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Vol. 38. Issue 1.
(January - March 2024)
Original article
Is palatal rugae a specific marker of dysmorphogenesis in patients with schizophrenia?
O. Oflezera,
Corresponding author
zlmgrbz@yahoo.com

Corresponding author at: Department of Prosthodontics, Istanbul Provincial Health Directorate, Istanbul, Turkey.
, C. Oflezerb, Z.D. Gürbüzc, H. Bahadird, Ö.E. Çiçeke, E. Kurtf
a Department of Prosthodontics, Istanbul Provincial Health Directorate, Istanbul, Turkey
b Department of Anesthesiology, Bakirkoy Training and Research Hospital for Psychiatry, Neurology, and Neurosurgery, Istanbul, Turkey
c Faculty of Medicine, Biruni University, Istanbul, Turkey
d Department of Radiology, Private Practice, İstanbul, Turkey
e Department of Health Management, Istanbul University, Cerrahpasa Faculty, Istanbul, Turkey
f Department of Psychiatry, University of Health Sciences, Bakirkoy Training and Research Hospital for Psychiatry, Neurology, and Neurosurgery, Istanbul, Turkey
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Tables (3)
Table 1. Comparison of age, sex, and palatal rugae parameters between schizophrenia and control group.
Table 2. Comparison of age and palatal rugae parameters between schizophrenia and control groups based on sex.
Table 3. Results of logistic regression analysis. Odds ratios (OR) with 95% confidence intervals (CI).
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Abstract
Background and Objectives

Supporting the neurodevelopmental model of schizophrenia, minor physical anomalies (MPAs) are markers of abnormalities in early fetal development. The mouth seems to be a common region for the occurrence of MPAs in patients with schizophrenia. This study aimed to compare the palatal rugae patterns, according to their length, shape, and orientation, between patients with schizophrenia and controls in a blinded fashion. The palatal rugae patterns were also evaluated by sex, as its effect on neurodevelopment was relevant.

Methods

Dental stone models were fabricated from maxilla impressions of patients with schizophrenia (N = 105) and controls (N = 105). Based on their lengths, three types of palatal rugae were classified; primary, secondary, and fragmentary. Primary rugae were further categorized according to their shape and direction.

Results

The most detected palatal rugae were the primary ones in both groups. The primary, secondary, and fragmentary rugae numbers in both groups were no different. There were significant differences in the shape and orientation of the primary rugae between the two groups. Curved (OR:1.76, p = 0.006), island (OR:2.97, p = 0.001) and nonspecific (OR:5.44, p = 0.004) primary rugae shape were found to be significant predictive variables for schizophrenia. Randomly oriented rugae numbers were higher in schizophrenics than controls (p = 0.018). The two sexes had different preferences in primary rugae shapes and directions compared to same-sex controls in patients with schizophrenia.

Conclusion

Identifying subtle changes in the primary rugae pattern, which appear to be sex-specific, is consistent with impaired neurodevelopment in schizophrenia.

Keywords:
Schizophrenia
Neurodevelopment
Palatal rugae
Sex

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