Dental maturation in hemifacial microsomia.

Area of Science:

• Dentistry
• Genetics
• Craniofacial Biology

Background:

• Hemifacial microsomia (HFM) is a congenital condition characterized by unilateral or bilateral mandibular malformations.
• The severity of mandibular deformity in HFM varies, impacting facial asymmetry.
• Understanding tooth development in HFM is crucial for diagnosis and treatment planning.

Purpose of the Study:

• To evaluate and compare mandibular tooth development patterns between the affected and unaffected sides in patients with unilateral Hemifacial Microsomia (HFM).
• To determine if the severity of mandibular deformity in HFM influences dental maturation.
• To analyze the symmetry or asymmetry of tooth maturation in relation to HFM severity.

Main Methods:

• Utilized the Demirjian and Goldstein technique to assess mandibular tooth development in 89 patients with unilateral HFM.
• Classified mandibular severity using Pruzansky's grading system (Grade I, II, III).
• Compared tooth development patterns using 45-degree oblique cephalometric radiographs of affected and unaffected sides.

Main Results:

• 45.7% of patients exhibited symmetrical tooth maturation between affected and unaffected sides.
• Among patients with asymmetrical maturation (54.3%), 54.4% showed advanced dental development on the affected side, while 45.5% showed advancement on the non-affected side.
• These patterns were observed across different grades of mandibular deformity severity.

Conclusions:

• Mandibular deformity in Hemifacial Microsomia (HFM) does not consistently affect dental maturation compared to the contralateral side.
• Tooth development symmetry is common in unilateral HFM, irrespective of malformation severity.
• Further research may explore underlying genetic or developmental factors influencing dental maturation in HFM.