Fibrous dysplasia is a benign fibroosseous bone dysplasia that can involve single (monostotic) or multiple (polyostotic) bones. Monostotic form is more frequent in the jaws. It is termed as craniofacial fibrous dysplasia, when it involves, though rarely, adjacent craniofacial bones. A 16-year-old girl consulted for a painless swelling in the right posterior mandible for two years. Panoramic radiography revealed ground-glass ill-defined lesions in the three different regions of the maxilla and mandible. Axial CT scan (bone window) showed multiple lesions involving skull base and facial bones. Despite lesions in the skull base, the patient had no abnormal neurological findings. The lesion was diagnosed as fibrous dysplasia based on radiological and histopathological examination. In this paper, CT findings and differential diagnosis of CFD are discussed. CT is a useful imaging technique for CFD cases.

The temporomandibular joint (TMJ) consists of a pair of symmetrical, mobile, synovial and diarthrodial joints located at the base of the head between the temporal bone and mandibular condyle.Separated into upper and lower joint spaces by a fibrous disc, 1 the TMJ allows the jaw to move in several directions and transfers the forces and loads resulting from chewing to the base of the head. 2 Recent developments in the imaging technology enabled 3D static and dynamic analysis of TMJ, thus helped better understand its biomechanics. Consequently, it is understood that mandibular morphology has wide intra-and interindividual variations.This variability depends on mutual interaction of morphology and functionality. 3 Abstract Background: The articular eminence of the temporomandibular joint is an anatomical structure exposed to functional loads resulting from masticatory forces. Tooth loss may change the biomechanics of the masticator system, and the articular eminence can be affected by this change.Objective: The aim of this study is to examine the relationship between the edentulousness and the articular eminence inclination of the temporomandibular joint. Methods:The articular eminence inclination was measured in panoramic radiographs in the right and left temporomandibular joint on a total of 100 patients (50 dentate and 50 edentulous). The articular eminence inclination of dentate and edentulous patients was compared, as well as the influence of gender and duration of edentulousness. Results:The mean articular eminence inclination value in the dentate group (42.6 ± 4.3 0 ) was higher than that of the edentulous group (35.1 ± 4.7 0 , P < .001).Although there was no significant difference between males and females in the dentate group with regard to articular eminence inclination (42.0 ± 4.7 0 and 42.9 ± 4.1 0 , respectively, P = .373), in the edentulous group, males had higher values as compared to females (37.1 ± 4.7 0 and 34.2 ± 4.5 0 , respectively, P = .003). Finally, the duration of edentulousness and the degrees of articular eminence inclination values did not show positive correlations (P = .782). Conclusion:According to the results of this study, we found that edentulous patients had lower articular eminence inclination than dentate patients, and it was more prominent in female than male patients. K E Y W O R D Sarticular eminence, edentulousness, eminence inclination, panoramic radiography, temporomandibular joint, tooth loss How to cite this article: Unal Erzurumlu Z, Celenk P. A radiological evaluation of the effects of edentulousness on the temporomandibular joint.

The oral hygiene of most patients was insufficient. The presence of Gram-negative Bacilli growth in the oral flora can be explained by poor hand hygiene. These findings suggest that it is useful to educate individuals about oral hygiene and hand hygiene and to inform the staff and families about this issue.

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