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  • Title: Relationship between appearance of a double contour on the mandibular condyle and the change in articular disc position after splint therapy.
    Author: Yano K, Nishikawa K, Sano T, Okano T.
    Journal: Oral Surg Oral Med Oral Pathol Oral Radiol Endod; 2009 Oct; 108(4):e30-4. PubMed ID: 19717317.
    Abstract:
    OBJECTIVE: The aim was to investigate the relationship between the appearance of double contours on the mandibular condyle and changes in articular disc position after splint therapy. STUDY DESIGN: Panoramic radiographs and magnetic resonance images of 82 joints in 41 patients taken before and after treatment were studied. The number of cases showing a double contour after treatment was compared between the 2 groups with and without disc displacement before treatment, and between the 2 groups with and without reduction in the displacement group; a comparison was also made among age groups and among 3 groups showing improvement, aggravation, or no change in displacement after treatment. RESULTS: All joints showing a double contour after treatment showed articular disc displacement before treatment. No double contours were observed after treatment on joints without articular disc displacement before treatment. All joints showing a double contour showed improvement in disc displacement. CONCLUSION: The results indicate that a double contour on the mandibular condyle is the result of repositioning of, or positional improvement in, a displaced articular disc.
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