Abstract
We encountered a case of heterochromosome(46 XY, -22, +Mar. ) a boy seven years and four months of age.
1)His physical growth was normal, but his mental development was ratarded.
2)Our findings such include craniofacial characteristics as long eyelashes, almond-eyes and large ears. These are similar to the clinical finding of r (22) syndrome.
3)The mesio-distal diameters of the upper and lower diciduous molars, and permanent molars were smaller than normal.
4)Enamel hypoplasia was observed in the upper incisor teeth. Dental anomalies such as abnormal shape and lack of tooth germs were not observed.
5)The patient received dental treatment under general anesthesia because he had severe mental retardation and moved the upper part of body. Since then, his dental health has been maintained with periodic dental check-ups at our hospital.
