Magnetic resonance imaging and fractal analysis findings in temporomandibular joints with disk perforation

Running Title: Comparison of Fractal analysis and MRI Findings
Published:January 09, 2023DOI:



      : This study compared magnetic resonance image (MRI) findings and fractal dimension (FD) values, as calculated with fractal analysis, in the temporomandibular joints (TMJs) of study patients with disk perforation vs control patients.

      Study Design

      : Of 75 TMJs examined with MRI for characteristics of the disk and condyle, 45 were included in the study group and 30 in the control group. MRI findings and FD values were compared for significance of differences between the groups. The frequency of subclassifications was analyzed for differences between the two forms of disk configuration and grades of effusion. Mean FD values were analyzed for differences among subclassifications of MRI findings and between groups.


      : MRI variables of disk configuration, internal disk status, condylar morphology, and effusion differed significantly between study and control patients (P = .001). Joints with perforated disks had a large percentage of normal disk-condyle relationships (73.3%, P = .001). Significant differences were discovered between biconcave (normal) and flattened disk configuration in the frequencies of internal disk status and condylar morphology. FD values of all patients varied significantly among the subclassifications of disk configuration, internal disk status, and effusion. Mean FD values were significantly lower in the study group with perforated disks (1.07) compared to the control group (1.20, P = .001).


      : MRI variables and FD can be useful in investigating intra-articular TMJ status.


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