Question 22 · LDEK · Etiology of malocclusion
Which of the following concerning ectodermal dysplasia are true?
1) its characteristic features include malformation of middle and lower facial part. hypoplasia of the alveolar bone because of multiple hypodontia;
2) its characteristic features include multiple impacted teeth and supernumerary teeth;
3) its characteristic features include lack of many tooth buds, late eruption, small and conical teeth;
4) in group A according to Freire-Maia and Pinheiro minimum 3 signs must be diagnosed: hair disorder, teeth disorder, nail dysplasia, sweating disorders;
5) in group A according to Freire-Maia and Pinheiro minimum 2 signs must be diagnosed: hair disorder, teeth disorder, nail dysplasia, sweating disorders;
6) another name for the syndrome is mutual dysostosis.
The correct answer is:
2) its characteristic features include multiple impacted teeth and supernumerary teeth;
3) its characteristic features include lack of many tooth buds, late eruption, small and conical teeth;
4) in group A according to Freire-Maia and Pinheiro minimum 3 signs must be diagnosed: hair disorder, teeth disorder, nail dysplasia, sweating disorders;
5) in group A according to Freire-Maia and Pinheiro minimum 2 signs must be diagnosed: hair disorder, teeth disorder, nail dysplasia, sweating disorders;
6) another name for the syndrome is mutual dysostosis.
The correct answer is:
- A. 1,3,5.
- B. 3,5.
- C. 1,2,3,4.
- D. 1,3,4.
- E. 1,5,6.
Hint
Contrast ectodermal dysplasia (missing teeth) with cleidocranial dysplasia (extra and impacted teeth), and recall the Group A criterion.
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