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Mandibular hypo-hyperdontia: A report of three cases
S V S G Nirmala1, C Sandeep1, Sivakumar Nuvvula1
1, , Pedodontics and Preventive dentistry, Narayana Dental College and Hospital, Nellore, Andhra Pradesh, India.
Summary
This study reports rare cases of concomitant hypodontia and hyperdontia (CHH) in the same dental arch. These cases involved missing mandibular incisors alongside extra mandibular teeth, a unique combination.
Area of Science:
- Dentistry
- Human Genetics
- Developmental Biology
Background:
- Dental anomalies, particularly concerning tooth number, are more prevalent in permanent than primary dentition.
- The simultaneous occurrence of hypodontia (missing teeth) and hyperdontia (extra teeth) within the same dental arch is exceptionally rare.
Observation:
- Three pediatric patients (one female, two male) presented with a rare combination of dental anomalies during routine examinations.
- These cases uniquely featured hypodontia of a mandibular central incisor and the presence of a mandibular mesiodens (an extra tooth) in the anterior mandible.
Findings:
- The observed anomaly is termed concomitant hypo-hyperdontia (CHH) affecting the mandibular anterior region.
- Notably, these are the only documented cases of mandibular CHH presenting with associated taurodontism (enlarged pulp chambers).
Implications:
- This finding highlights the complex interplay of genetic and developmental factors influencing tooth formation.
- Understanding these rare combined anomalies is crucial for accurate diagnosis and tailored dental management.
- Further research into the etiology of CHH and associated conditions like taurodontism is warranted.
