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    Öğe
    Long-term results of arthrocentesis in degenerative temporomandibular disorders
    (Mosby-Elsevier, 2009) Önder, M. Ercüment; Tüz, Hakan H.; Koçyiğit, Doruk; Kişnişçi, Reha S.
    Objectives. Long-term efficacy of arthrocentesis was investigated in patients with degenerative temporomandibular disorder (TMD) in this clinical study. Study design. Twenty-two joints of 15 patients with degenerative TMD were included as the study group, and 16 joints of 10 patients served as the control group. Arthrocentesis procedures in upper joint spaces were performed. The study group patients' mean follow-up period was 36.7 +/- 18.7 months, whereas the control group were kept for an average 9.9 +/- 2.8 months. Results were statistically compared using 1-way repeated analysis of variance and t test. Results. Pretreatment maximal interincisal opening increased significantly from 33.6 +/- 6.0 mm to 37.8 +/- 6.0 mm in the study group. Pretreatment pain and crepitus scores decreased significantly from 71.0 +/- 6.6 to 27.0 +/- 16 and 0.73 +/- 0.4 to 0.6 +/- 0.5, respectively, in the study group. Conclusions. Arthrocentesis was found to be a useful method for the treatment of degenerative TMDs, and the outcomes of treatment provide long-term cure for degenerative temporomandibular joints. (Oral Surg Oral Med Oral Pathol Oral Radiol Endod 2009; 107: e1-e5)
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    Öğe
    Quantitative assessment of image artifacts from zygoma implants on CBCT scans using different exposure parameters
    (Sage Publications Ltd, 2023) Orhan, Kaan; Koçyiğit, Doruk; Fırıncıoğluları, Müjgan; Adısen, Mehmet Zahit; Koçyiğit, Seda
    This study was aimed at quantifying artifacts from zygoma implants in cone-beam computed tomography (CBCT) images using different exposure parameters. Two cadaver heads, one with two zygoma implants on each side and the other for control, were scanned using 18 different exposure parameters. Quantitative analysis was performed to evaluate the hypodense and hyperdense artifact percentages calculated as the percentage of the area. Hyperdense artifacts and hypodense artifacts were detected, followed by the calculation of the hyperdense and hypodense artifact percentages in the image. In the qualitative analysis of the artifacts, the scores used were as follows: absence (0), moderate presence (1), or high presence (2) for hypodense halos, thin hypodense lines, and hyperdense lines. Artifact analysis was performed qualitatively and quantitatively using the post-hoc Tukey and Two-way ANOVA tests. As a result, in the qualitative analyses, zygoma implants showed a significant difference compared to the control group with regard to hyperdense and hypodense artifacts (p < 0.05). There was a significant difference between the means according to the FOV size arithmetic averages (p < 0.05). In terms of voxel size, the difference was found to be significant, where 400 microns showed the highest hypodense artifact while 200 microns showed the lowest hypodense artifact. In conclusion, hypodense and hyperdense artifacts were significantly higher in cadavers with zygoma implants than in controls. As FOV and voxel size increase, more hypodense artifacts are produced by zygoma implants so smaller FOV and voxel sizes should be used to prevent poor image quality of adjacent teeth.