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Amelogenesis imperfecta, type 1J(AI1J)

MedGen UID:
934597
Concept ID:
C4310630
Congenital Abnormality
Synonyms: AI1J; Amelogenesis imperfecta, type IJ
 
Gene (location): ACP4 (19q13.33)
 
Monarch Initiative: MONDO:0015008
OMIM®: 617297

Definition

Amelogenesis imperfecta is an inherited defect of dental enamel formation that shows both clinical and genetic heterogeneity. In the hypoplastic type of AI, the enamel is of normal hardness but does not develop to normal thickness. The thinness of the enamel makes the teeth appear small. Radiographically, enamel contrasts normally from dentin. The surface of the enamel can vary, showing smooth, rough, pitted, or local forms (Witkop, 1988). [from OMIM]

Clinical features

From HPO
Amelogenesis imperfecta
MedGen UID:
240
Concept ID:
C0002452
Congenital Abnormality
A developmental dysplasia of the dental enamel.
Carious teeth
MedGen UID:
8288
Concept ID:
C0011334
Disease or Syndrome
Caries is a multifactorial bacterial infection affecting the structure of the tooth. This term has been used to describe the presence of more than expected dental caries.
Enamel hypoplasia
MedGen UID:
3730
Concept ID:
C0011351
Disease or Syndrome
Developmental hypoplasia of the dental enamel.
Increased overbite
MedGen UID:
539656
Concept ID:
C0266063
Disease or Syndrome
Maxillary teeth cover the mandibular teeth when biting to an increased degree. The feature is defined as a vertical overlap of the maxillary incisors over the mandibular incisors that exceeds 2 mm.
Widely spaced teeth
MedGen UID:
337093
Concept ID:
C1844813
Finding
Increased spaces (diastemata) between most of the teeth in the same dental arch.
Abnormal dentin morphology
MedGen UID:
866943
Concept ID:
C4021299
Anatomical Abnormality
Any abnormality of dentin.

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