On the etiology of growth disturbance of the mandible in juvenile rheumatoid arthritis.

SummaryOne case of congenital micrognathia unaccompanied by any other congenital malformations was discovered among 33,000 school children surveyed. This case showed roentgenological evidence of condylar aplasia. The same change had been noted earlier in some cases of juvenile rheumatoid arthritis associated with micrognathia. The conclusion is drawn that in some of the children with RA associated with micrognathia, this latter has a congenital basis whereas, in other cases, it is due to affection of the temporomandibular joint.