2. Aetiology
• It appears as a true dominant Mendelian
characteristic
• incomplete penetrance of genetic trait
3. Clinical features
• Primarily affects skull, clavicle and dentition
• shoulder meet in midline
• head is brachycephalic or wide and short
• lacrimal and zygomatic bone are also
underdeveloped
• sagittal suture is characteristically sunken,
giving skull flat appearance
• nasal bridge is depressed with a broad base
4. Oral manifestation
• Micrognathia
• maxilla is underdeveloped and is smaller than
normal, in relation to mandible
• prognathism
• prolonged retention of primary dentition and
delayed eruption of permanent dentition
• high narrow arched palate and cleft palate may
be common
• Crown may be pitted because of enamel
hypoplasia
5. Radiographic features
• Skull film reveals open sutures
• malformation and absence of clavicles
• prolonged retention of primary teeth
• presence of supernumerary teeth usually in
anterior region
• small underdeveloped jaw
• roots of teeth are short and thinner than
normal
6. Diagnosis
• Meeting shoulder in the midline is typical
feature of cleidocranial dysplasia
• supernumerary teeth, open sutures and
absence of clavicle
7. Management
• Management of skull and clavicle anomalies –
there is no treatment is required for this
anomaly
• dental care – supernumerary teeth, they
should be extracted
