Methods: Dental age was derived from OPT radiographs and assigning stages of crown and root development using the technique as described by Haavikko in 1970. Skeletal age was gained from the proportions of the third and fourth cervical vertebrae as seen on Lateral Cephalograms described by Mito 1972.
Results: Triplets A and B were facially similar, were concordant for absent teeth and had similar dental ages. Triplet C was facially dissimilar, discordant for absent teeth and discordant for dental age. Triplet A and B had a delayed dental age relative to chronological age. This is in agreement with published literature (Uslenghi 2006). Triplet C, who had increased severity of hypodontia, had a dental age well in advance of his chronological age. This is contrary to published literature which shows increasing delay of dental development with increased severity of hypodontia. Skeletal age for A and B was similar to their Chronological age but triplet C showed delayed skeletal age. Skeletal aging was complicated by Lateral Cephalograms which were not standardised at the cervical vertebrae.
Conclusion: Triplet A and B were more similar for Dental and Skeletal age than triplet C. Triplets A and B were facially similar, though no zygosity testing was carried out. Dental aging techniques are less reliable when there are a reduced number of teeth to assess.