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Developmental anomalies of jaws
1. DEVELOPMENTAL ANOMALIES OF JAWS
MICROGNATHIA
MICROGNATHIA:SMALL JAW.
1.True micrognathia
2.Apparent micrognathia
In this case mandible is underdeveloped.
It giving a BIRD FACIES APPEARANCE.
AGNATHIA
A:Absence , Gnathia:jaw, Absence of maxilla /mandible
In maxilla: maxillary process/premaxilla, In mandible:ramus,condyle
Unilateral ramus missing(due to faliure of migration of neural crest mesenchyme into
maxillary prominence)
MACROGNATHIA
Abnormally large jaws
Pituitary gigantisetm:both jaws large
Maxillary enlargement:peget’s disease,cherubism
Mandibular enlargement:acromrgaly
Treatment:surgical correction.
Due to acromegaly.
bbbb
FACIAL HEMIHYPERTROPHY
Hyper trophy of soft and hard tissue.
T/t:cosmetic surgery.
Periodic ultra sound and MRI unilateral enlarge-
ment
FACIAL HEMIATROPHY
Othername :PARRY ROMBERG SYNDROME
Slowly progressive atrophy of the soft
tissue of essentially half of face .
Wasting of subcutaneous fat may spread one sie of neck & body
.
MANDIBLE
ABSENT
SK AZIZ IKBAL
DEPARTMENT OF ORAL MEDICINE AND RADIOLOGY
NORTH BENGAL DENTAL COLLEGE AND HOSPITAL