Abstract
Tooth impaction is a pathological condition where a tooth fails to attain its normal functional position. The present study aims to highlight the phenotypic heterogeneity of impacted third molars in a Caucasian family, to investigate the characteristics of the dental phenotype, to evidence the diversity of dental phenotype, and to identify the inheritance mode of the condition. Detailed anamnesis, clinical examination, complementary tests (panoramic radiographs), family study and pedigree analysis. Phenotypic characteristics of impacted third molar tooth in our family case report was: Severe horizontal impaction of the mandibular right third molar, Angular impaction of the maxillary right third molar and angular impaction of the maxillary left third molar, Angular impaction of the mandibular left third molar and partial eruption of the maxillary right third molar, Horizontal impaction of the mandibular left third molar and Angular impaction of the mandibular left third molar. The inheritance mode of the impacted third molar tooth in the family case report was: from mother to both daughters’ transmission, from mother to both sons’ transmission, and from mother to daughter transmission. Family study and pedigree analysis are very important for illustrate the genetic basis of impacted teeth.
Highlights
Tooth impaction is a pathological situation where a tooth fails to attain its normal functional position [1]
The present study aims to highlight the phenotypic heterogeneity of impacted third molars in a Caucasian family, to investigate the characteristics of the dental phenotype, to evidence the diversity of dental phenotype, and to identify the inheritance mode of the condition
Most authors claim that the incidence of mandibular third molar impaction is higher in females [6,7,8]
Summary
Tooth impaction is a pathological situation where a tooth fails to attain its normal functional position [1]. 1: Mother, II4: severe horizontal impaction of the mandibular right third molar (Figure 1); Case no. 3: Second soon, III8: angular impaction of the mandibular left third molar and partial eruption of the maxillary right third molar (Figure 3); Case no. 4: Mother's sister, II5: horizontal impaction of the mandibular left third molar (Figure 4); Case no. 5: Daughter, III9: angular impaction of the mandibular left third molar (Figure 5). The inheritance mode of the impacted third molar tooth in the family case report was: from mother (I1) to both daughters transmission (II4 and II5), from mother (II4) to both sons transmission (III7 and III8), and from mother (II5) to daughter transmission (III9), (Figure 6). 3 - III8: angular impaction of the mandibular left third molar and partial eruption of the maxillary right third molar. Case no. 4 - II5: horizontal impaction of the mandibular left third molar Case no. 5 - III9: angular impaction of the mandibular left third molar
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