Radiographic Appearance of the Normal Temporomandibular Joint in Newborns and Small Children

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Abstract
The radiographic anatomy of the normal temporomandibular joint in newborns and children up to 4 yr of age was investigated, partly on specimens obtained at autopsy, with methods corresponding to clinical procedures and partly on patients. A rather flat mandibular fossa and immature mandibular head were found at birth, whereas a well-developed articular tubercle and an adult-like radiographic appearance of the joint were found at .apprx. 1 yr of age. No evident changes of the radiographic anatomy seemed to occur from 1-4 yr of age. A striking similarity was observed between the dystrophic temporomandibular joint in patients with juvenile rheumatoid arthritis and micrognathia and the normal radiographic appearance in the 1st mo. of life, indicating an early involvement of this joint in patients developing micrognathia.