[Cases analysis and clinical classification of oligodontia].
OBJECTIVE
To classify the clinical symptoms of oligodontia and summarize the characteristics of the diseases.


METHODS
33 patients with congenitally permanent teeth missing (6 or more than 6) were taken clinical examination, diagnosis, prosthetic treatment and made records of the status of tooth agenesis, systemic symptoms, and family history.


RESULTS
The symptoms of oligodontia were clinically classified into two groups: oligodontia with or without systemic syndromes. And the former has two typical kinds of diseases: anhidrotic/hypohidrotic ectodermal dysplasia (EDA) and Rieger syndrome.


CONCLUSIONS
Correct diagnosis and early treatment for these patients are of very importance.
Zhang
Xiao-xia
XX
Department of Prosthodontics, Peking University School of Stomatology, Beijing 100081, China.
Feng
Hai-lan
HL
D000293:Adolescent; D000328:Adult; D000848:Anodontia / Q000175:diagnosis* / Q000628:therapy; D002648:Child; D002675:Child, Preschool; D004476:Ectodermal Dysplasia / Q000175:diagnosis; D005124:Eye Abnormalities / Q000175:diagnosis; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D013577:Syndrome