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Clinical RelevanceAs a result of variations in accurate shade perception, considerations should be given to using multiple opinions to compensate for errors caused by gender or inexperience, especially when lighter shades are involved. SUMMARYStatement of the Problem: Precise shade matching can be one of the most difficult tasks for the dentist and some variables may influence the process of shade comparison.Purpose of the Study: This study tested the differences in shade perception between genders, the influence of the observer's clinical experience, and the value of ceramics in correct shade selection. Results: The results indicated that there were statistical differences among gender, clinical experience, and shades in discriminating ceramics.Conclusions: Men and observers with more clinical experience were more successful in discriminating shades, although darker shades were selected more correctly than the lighter ones.

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Juvenile idiopathic arthritis is a term used to include all chronic childhood arthritis of unknown etiology. It is characterized by chronic inflammation persisting for at least 6 weeks, beginning before 16 years of age. The characteristics present are chronic synovitis, arthralgia, impaired joint mobility in at least one joint, and erosion with destruction of cartilage and subchondral bone, that could be associated or not with systemic involvement, according to each subtype of the disease. During the pathologic process, the temporomandibular joint can be involved by the juvenile idiopathic arthritis, resulting in severe mandibular dysfunction, with higher frequency in female patients. Initially, these lesions can show minor alterations like flattening of the condyle, erosions, and evolve to severe lesions, like destruction of the head of the condyle. We report a case of male patient who had destruction of both condyles, as a result from juvenile idiopathic arthritis. Proposed mechanisms to explain the juvenile idiopathic arthritis was reviewed. In this report the patient did not have pain or inflammatory process, and the temporomandibular diseases was the only manifestation.