No abstract

Dentoalveolar changes observed in HPT include alveolar bone demineralization. The fractal dimension (FD) analysis of the bone tissue has been introduced as an alternative method to investigate the quality of the alveolar bone. FD values of the patient showed osteoporotic bone characteristics between 1997 and 2006 until the date of parathyroidectomy. Mandibular bone FD analyses revealed a prominent development, which was also observed in dual energy X-ray absorptiometry values.

The findings of this study revealed that even though a slight deterioration occurred after the first exposure, each plate can be used up to 200 times. Further studies are required to reach a more concrete conclusion.

The objective of this study is to examine observer agreement on the rank of the color tones after toluidine blue staining of a mucosal lesion. Cohort study with repeated measures is the design of the study. Twenty observers ranked and scored 8 specified areas on the color images of a lesion before and after toluidine blue application in two sessions. Inter and intra-observer variations were analyzed with Cohen's kappa. The L* (the black-white axis), a* (red-green axis), and b* (yellow-blue axis) values were measured and set as the gold standards. Intra and inter-observer agreements were к = 0.86 and к = 0.854. All color parameters were effective on the color ranking order (pL* = 0.00, pa* = 0.007, pb* = 0.00), although L* and b* were more effective on the ranking of the samples than a*. Areas that appeared pale blue visually had a significant blue component, but the observers were confused with the effect of whiteness of the area in clinical decision making.

Objectives We have evaluated radiographic changes in mandibular bone texture before and after surgical therapies using fractal analysis and digital subtraction radiography (DSR). Materials and methods Preoperative and postoperative panoramic radiographs of 10 patients were acquired and converted into digital format. The procedures for calculating the fractal dimension (FD) were performed using Image J 1.38x software, and the mean gray values (MGVs) for digital subtraction were implemented using newly developed software (RAIN). Data were analyzed statistically with the paired t-test and Pearson's correlation test. Results The differences between the FD values (p = 0.0019) and between the MGVs (p = 0.0181) of the preoperative and postoperative images were statistically significant; the correlation did not reach statistical significance, however (p [ 0.05). Conclusion FD analyses and DSR application are proposed for quantitative determination of bone changes.Further studies are planned to provide a more detailed evaluation of these methods.