Fusion or gemination? An unusual mandibular second molar

Area of Science:

• Dentistry
• Oral and Maxillofacial Radiology
• Developmental Dental Anomalies

Background:

• Tooth fusion and gemination are recognized developmental anomalies, frequently observed in primary dentition and permanent maxillary incisors.
• These dental anomalies can lead to various complications, necessitating accurate diagnosis and management.
• Radiographic interpretation plays a crucial role in identifying and differentiating between fusion and gemination.

Purpose of the Study:

• To report a rare case of an unusual mandibular second molar exhibiting characteristics that challenge the classification between fusion and gemination.
• To emphasize the diagnostic difficulties encountered by radiologists when faced with atypical presentations of these dental anomalies.
• To contribute to the literature by documenting a case not previously reported involving the "second and third" molar region.

Main Methods:

• A case study involving an 11-year-old male patient.
• Radiographic examination was performed to identify and analyze the dental anomaly.
• Differential diagnosis was considered to distinguish between fusion and gemination based on radiographic findings.

Main Results:

• An unusual radiographic finding of a mandibular second molar was identified.
• The case presented diagnostic challenges in classifying the anomaly as either fusion or gemination.
• This represents a unique instance in the literature involving the second and third molar.

Conclusions:

• While fusion and gemination are common in other dental regions, their occurrence in mandibular molars, particularly the second and third, is exceptionally rare.
• Radiologists must be prepared for unusual presentations and employ thorough diagnostic approaches for accurate classification.
• Further documentation of such rare cases is essential for a comprehensive understanding of dental developmental anomalies.