American Journal of Orthodontics and Dentofacial Orthopedics
Original articleSkeletodental patterns in patients with multiple congenitally missing teeth☆
Section snippets
Material and methods
The pretreatment orthodontic records of 115 children (45 boys and 70 girls) with multiple CMT collected from orthodontic clinics in Israel served as the database for this study. The inclusion criterion was at least 3 CMT (excluding third molars) from at least 2 different tooth groups. Children with cleft lip and palate, craniofacial anomalies, and diagnosed syndromes were excluded from the study group.
The age of the patients ranged from 6 to 27.5 years (mean 12.4 ± 2.8 years). The distribution
Results
Nine cephalometric measurements (means ± SD) of the total study group were compared with the classical norms (Table I) and 7 measurements with the Israeli norms (Table II). More statistically significant differences were observed in comparison with the latter group. The comparison of the 3 categories by number of CMT is given in Table III. Most differences were obtained in comparisons with the most severely affected category of 10+ CMT. The following results were obtained in comparing the
Discussion
Patients with a minimum of 3 CMT were included in this study if the missing teeth belonged to at least 2 different tooth groups. The justification for this decision was the clinical observation that 3 missing teeth from different groups is less frequent than 4 missing teeth from the same group. This might imply a higher severity of failure in tooth genesis. This could also involve a more complicated genetic transmittance; recent publications suggest a regional genetic control for tooth agenesis.
Conclusions
We made the following conclusions from this study.
- 1.
Patients with CMT have a characteristic skeletodental pattern.
- 2.
Patients with 10 or more CMT have the most extreme skeletodental pattern.
- 3.
Anterior tooth absence has a predominant influence on the skeletodental configuration.
Acknowledgements
We thank I. Einot, MSc, Department of Statistics, HU Jerusalem, for his help with the statistical workup and the Israeli orthodontists who contributed the records of their patients with multiple CMT.
References (19)
- et al.
Teeth. Where and how to make them
Trends Genet
(1999) - et al.
Craniofacial structure and soft tissue profile in patients with hypodontia
Am J Orthod Dentofacial Orthop
(1995) - et al.
An investigation of the association between anterior open-bite and amelogenesis imperfecta
Am J Orthod
(1982) - et al.
Congenitally missing teeth
- et al.
Hypodontiaprevalence amongst Jewish populations of different origin
Am J Phys Anthrop
(1973) Molecular determinants of anodontia
The primary role of functional matrices in facial growth
Am J Orthod
(1969)- et al.
Craniofacial morphology in patients with multiple congenitally missing teeth
Eur J Orthod
(1994) - et al.
The craniofacial morphology of individuals with hypodontia
Acta Odontol Scand
(1974)
Cited by (0)
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This project was supported (in part) by a grant from the joint Research Fund of the Hebrew University—Hadassah School of Dental Medicine founded by the Alpha Omega Fraternity—and the Hadassah Medical Organization.