Abstract
It is supposed that great influences are recognized for the stomatognathic system by natural and premature loss of canine.For the case of TMJ syndrome with the background of unilateral canine defect, attrition of remaining caninus dicidus and working side posterior molar causing premature contact with the balancing side, we carried out morphological examination of the dental arch and TMJ by using three-dimentional high elaborate razor and X-ray. We obtained the following results.1. Excluding the premature contact with the balancing side, disappearance of trismus and pain were recognized.2. Attrition of canine defect side molars, especially on palatal surface, were stronger than the other side may indicate the possibility of a shortening vertical dimension.3. Palatal form of canine defect side was narrow and inclined. So the dental arch was near the median line.4. X-ray of canine defect side showed a shallow glenoid fossa and modification of the condyle.
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