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Analysis of craniofacial development in children with hypohidrotic ectodermal dysplasia
Euphemia LaRee Johnson1, Michael W Roberts, Albert D Guckes
1Private Pediatric Dentistry Practice, Rocky Mount, North Carolina, USA.
Insights
Ectodermal dysplasias (ED) cause abnormal craniofacial development in males. This study found significant craniofacial differences in ED patients, linked to hypodontia, with implants not altering growth.
Area of Science:
- Craniofacial development
- Genetics
- Dental implantology
Background:
- Ectodermal dysplasias (ED) are inheritable disorders affecting ectodermal derivatives.
- Craniofacial abnormalities are common in ED, particularly hypohidrotic ED with hypodontia.
Purpose of the Study:
- Establish cephalometric norms for male children with ED.
- Assess craniofacial growth in hypohidrotic ED males with hypodontia.
- Compare implant-treated vs. non-implant-treated ED males.
- Correlate hypodontia severity with craniofacial dysmorphology.
Main Methods:
- Cephalometric analysis of radiographs from ED and non-ED groups.
- Evaluation of traditional cephalometric landmarks and measurements.
- Statistical comparison using generalized estimate equation analysis.
Main Results:
- Significant craniofacial differences exist between ED and non-ED males, independent of age and gender.
- Hypodontia severity, specifically missing maxillary teeth, significantly correlates with craniofacial dysmorphology in ED.
- Craniofacial morphology showed no significant difference between implant-treated and non-implant-treated ED males.
Conclusions:
- ED is associated with distinct craniofacial dysmorphology, including cranial base and mandibular length.
- The degree of hypodontia is a key factor in craniofacial abnormalities within the ED population.
- Intraosseous dental implants did not significantly alter or normalize craniofacial growth in this ED cohort.
Abstract:
Ectodermal dysplasias (ED) are a heterogeneous group of inheritable disorders characterized by abnormal development of embryologic ectoderm derivatives. The purposes of this study were to: 1) create baseline cephalometric norms for male children with ED; 2) assess craniofacial growth and development in hypohidrotic ED male children with severe hypodontia, compared with non-ED children with class I dental relationships; 3) compare the craniofacial morphology of titanium dental implant-treated ED males with non-implant-treated ED males; and 4) correlate the severity of hypodontia to craniofacial dysmorphology. Cephalometric radiographs of class I individuals and implant-treated and nontreated ED groups were used to evaluate craniofacial morphology. Traditional cephalometric landmarks and measurements were used to compare groups using the generalized estimate equation analysis. Age, gender, and the number of permanent maxillary teeth present had a significant (P =.01) explanatory relationship with the craniofacial measures when comparing untreated ED children to norms. Mean craniofacial differences between ED and non-ED children still existed when the explanatory effects of these variables were controlled, indicating dysmorphology in several craniofacial structures (e.g., cranial base, mandibular length). The number of missing maxillary permanent teeth was significantly related with craniofacial dysmorphology in the ED population. Craniofacial morphology did not differ significantly between implant-treated and nontreated ED children, suggesting that treatment with intraosseous dental implants, as applied in this population, did not rescue normal craniofacial growth and development.