"Abnormalities of Teeth"
– 9 –
Charles Dunlap, DDS
Sept. 2004
Segmental Odontomaxillary Dysplasia (SOD or SOMD)
SOD is illustrated in Slides # 61 and #62, the
patients are age 13 and 4 respectively. The
right maxilla is involved in both cases. Unlike
regional odontodysplasia which involves only
teeth, segmental odontomaxillary dysplasia
involves teeth and bone. The segment of the
jaw that is involved is expanded due to
enlargement of the bone and hyperplasia of
overlying gingiva. Teeth in the involved are
malformed and some may be congenitally
missing. The condition is not progressive, i.e. it
has a limited growth potential. Radiographs show increased density of the affect bone with a granular pattern, the maxillary
sinus may be smaller than normal. Those who are not familiar with this condition may interpret the enlarged bone to be evi-
dence of a tumor or fibrous dysplasia of bone, both of which are progressive diseases.
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