Examination of the possible relation of the superior semicircular canal morphology with the roof thickness of the glenoi
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Examination of the possible relation of the superior semicircular canal morphology with the roof thickness of the glenoid fossa and bone changes of the temporomandibular joint Gülsün Akay1 · Muhsin S. Karataş1 · Özge Karadağ2 · C. Özlem Üçok3 · Kahraman Güngör3 Received: 13 April 2020 / Accepted: 15 May 2020 © Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Purpose This study sought to assess the relationships between a morphological characteristic of the superior semicircular canal (SSC) and both the roof thickness of the glenoid fossa (GF) and bone changes of the temporomandibular joint (TMJ) on three-dimensional images. Methods Cone-beam computed tomography (CBCT) images of 200 individuals (105 females and 95 males; 400 temporal bone regions) were examined by two different observers. The correlations between the bone thickness overlying the SSC and the thickness of the roof of the GF with TMJ’s bone pathologies were analyzed. Results The superior semicircular canal dehiscence (SSCD) was significantly associated with dehiscence of the roof of the GF. The relationship between the dehiscence of the SSC and the roof thickness of the GF was found to be strongly correlated (p 0.05). The distribution of the age groups and gender according to the five radiological patterns of SSC and test results are given in Table 2. The association between the bone changes of TMJ and the presence of SSCD (SSCD/non-SSCD) was analyzed by Fisher’s exact test. There was no significant association between the bone changes of the condyle and the status of SSCD (p > 0.05) (Table 3). The difference between three different changes in the TMJ bone (flattening, surface irregularities—erosion, osteophyte formation) according to the status of SSCD (SSCD/non-SSCD) was also analyzed using the Chi-square test. There were no statistically significant discrepancies between the bone changes of TMJ and the presence or absence of SSCD (p > 0.05).
Table 2 Correlation between age/gender and radiological patterns of SSC
Age groups
Radiological patterns of SSC Normal pattern
Up to 19 years 20–29 years 30–39 years 40–49 years 50–59 years 60 + years Genders Females Males
The mean roof thickness of the GF was 1.16 ± 0.75 mm. The association between the bone thickness covering the SSC and the roof thickness of the GF was examined by the non-parametric Spearman’s correlation coefficient due to the violation of the normality assumption. For the right side, the correlation coefficient was calculated as 0.46; for the left side was 0.36 and for both sides was 0.41. All of the three coefficients are statistically significant (p
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