Title: Heritability of Facial Growth of Children Using Lateral Cephalograms
Ramandeep Samra (Presenter)
Melih Motro, Boston University
AHMED ALSULAIMAN, Boston University
Leslie Will, Boston University
Objectives: The purpose of this study was to test the association of parental mid-face and nasal soft and hard tissue morphology with their offspring.
Methods: This retrospective pilot study was comprised of twenty western European families from the Forysth/Moorrees Twin Study. The lateral cephalograms of each parent and post-pubertal child, who was at least 2 years past peak growth (from literature age ≥ 16 yrs for females and ≥ 17 yrs for males) were evaluated on thirteen cephalometric variables including ANB, overjet, ratio of the nose to total face height (Nasion (N)-Anterior Nasal Spine (ANS)/N-Menton), angle of nasal bone relative to Sella (S)-N, nasal bone length, distance from rhinion to ANS, angle of ANS to S-N, distance of rhinion to pronasale, distance of ANS to pronasale, nasolabial angle, projection of nose, soft tissue convexity and nasal height. A two-way ANOVA with multiple comparisons (TUKEY) was performed to test for the differences between family members controlling for the effect of the individual family. Statistical significance was set at p < 0.05.
Results: Twelve male and 8 female offspring were studied. There was a significant difference between the child and father but not the mother for angle of nasal bone relative to S-N (p = 0.04), rhinion to ANS (mm) (p = 0.048), rhinion to pronasale (mm) (p < 0.0001), ANS to pronasale (mm) (p = 0.005), projection of nose (p = 0.0006) and nasal height (p = 0.03). There was no difference between males and females in the extent of their similarity to their mothers or fathers except for nasal height, where females were similar to their mother but different from their fathers (p = 0.03).
Conclusions: Children are morphologically more similar to their mothers than their fathers when comparing mid-face and nasal bone soft and hard tissue parameters.