The cause of<unk>  is still unknown. However, there are a few possible factors contributing to<unk> : * Vitamin deficiency * Hormonal irregularities * Infection or inflammation of areas near to the developing tooth bud * Drug induced * Genetic predisposition * Radiotherapy that caused damage to the developing tooth germ
Tooth gemination
Tooth fusion
Neural clique
Zona hatching
Labial fusion
Tooth regeneration
Sensory decussation
Vitreomacular adhesion