Succedaneous

Gungor and Turkkahraman found that people with hypodontia had smaller sized teeth than normal population and that deciduous teeth are overretained in cases when succedaneous teeth are absent7.

This, in turn helps in deciding treatment modalities like space regaining, space maintenance, space supervision or some extraction pattern like serial extraction.2-4 Mostly the size of primary buccal segment teeth is larger than their succedaneous teeth and is called leeway space.5,6 If not utilized, this space is most commonly lost in mesial drift of the molars.7

OPG depicted the presence of retained deciduous teeth in both upper and lower jaws with succedaneous permanent teeth and radiopaque teeth-like structures (51 and 21) [Figure 2].

Witkop Jr., "Agenesis of succedaneous teeth: an expression of the homozygous state of the gene for the pegged or missing maxillary lateral incisor trait.," American Journal of Medical Genetics, vol.

The difference in size be- tween the primary molars and the succedaneous premolars is termed "leeway space." This varies greatly from person to person, according to a longitudinal study by Bishara and colleagues.12 the average leeway space in that study was 2.2 mm in the maxilla and 4.8 mm in the mandible.