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    Investigation of glenoid fossa roof thickness in patients with and without TMJ disorders in a Turkish Subpopulation
    (2024) Altun, Arif; Dedeoğlu, Numan; Sobi, Elif
    The aim of this study was to evaluate the minimum thickness of the glenoid fossa (GFMT), the discontinuity of the roof of the glenoid fossa, and degenerative bone changes (DBC) using cone-beam computed tomography (CBCT), and to compare these findings between the patients with temporomandibular joint dysfunction (TMD) and patients witout TMD. CBCT images of 72 patients with TMD and 72 patients with non-TMD were evaluated for DBC and GMFC in the TMJ. The obtained data were compared between TMD group and non-TMD group, between DBC group and non-DBC group and between genders. Chi-square, fisher exact, and Mann-Whitney U tests were used to compare the data. The frequency of DBC was statistically different between the TMD group (79.2%) and non-TMD group (55.6%) (p=0.000). There was no statistical difference in the GFMT between in the TMD group (0.873 mm) and non-TMD group (0.853 mm). GFMT was statistically higher in DBC group (0.92 mm) compared to non-DBC group (0.738 mm) (p<0.05). There were no statistical differences between all groups for fossa discontuniuty and nutrition canal (p>0.05). The mean GFMT was found to be statistically higher in males than in females (p<0.05). Moreover, in the TMD group, the mean GFMT was found to be statistically higher in males than in females (p<0.05). The frequency of DBC was higher in TMD group than in non-TMD group. While TMD status had no effect on GFMT, it was found that GFMT increased in the presence of DBC. It was found that TMD and DBC had no effect on glenoid fossa discontinuity.
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    Öğe
    Relationship between maxillary sinus volume and alveolar trabeculation at orthodontic mini-implant sites across vertical skeletal patterns: a cross-sectional CBCT analysis
    (Bmc, 2025) Ozden, Samet; Cicek, Orhan; Sobi, Elif
    Background This study aimed to evaluate the relationship between maxillary sinus volume (MSV) and alveolar bone trabeculation using fractal dimension (FD) analysis across different vertical skeletal patterns, and to assess its potential implications for orthodontic mini-implant (OMI) stability. Methods CBCT images of 84 skeletal Class I individuals (47 females, 37 males; mean age 20.08 +/- 2.25 years) were analyzed and categorized into three vertical skeletal groups (28 normodivergent, 28 hyperdivergent, 28 hypodivergent). MSVs were measured bilaterally using 3D Slicer, and FD analyses were conducted on alveolar bone regions of interest (ROIs) located between the roots of teeth #14-15, #15-16, #16-17, and #24-25, #25-26, #26-27. MSV and FD values were analyzed within and between groups using one-way ANOVA, Kruskal-Wallis test, paired t-tests, Wilcoxon signed-rank tests, and Spearman's correlation test at a significance level of p < 0.05. The effects on OMI stability were then evaluated. Results Both right and left MSVs, as well as FD values in the ROIs between teeth #14-15, #15-16, #24-25, and #25-26, were found to be significantly higher in hypodivergent individuals. The posterior increase in FD values was significant only in the normodivergent group. In hypodivergent individuals, right MSVs were significantly correlated with FD values at the 14-15 ROI, and left MSVs with those at the 24-25 ROI, while no such correlation was found in other vertical patterns. Conclusions In hypodivergent individuals, increased trabecular complexity between the maxillary second premolar and first molar may enhance OMI stability; however, the MSV, which correlates significantly with FD values in this region, necessitates caution due to the potential risk of sinus perforation during insertion.