Comparison of dentofacial morphology in monozygotic twin pairs with their siblings using LISREL.
Lateral cephalometric radiographs from 33 families of monozygotic twins and their siblings were digitized. Seven dentofacial parameters were measured: 1 to SN, 1 to NA, 1 to NA(mm), 1 to 1, 1 to Mandibular Plane Angle, 1 to NB(mm) and 1 to APg(mm). Data from monozygotic twin pairs and siblings were analyzed using LISREL to determine variance components of heredity, common environment and random environment. Five of the parameters measured showed heredity as the primary factor of variance, while two, 1 to NB(mm) and 1 to APg(mm) showed a common environment as having the greatest effect.
Ramsey
T C
TC
Medical College of Virginia.
Sorin
M S
MS
Hart
T C
TC
Farrington
F H
FH
D000293:Adolescent; D000704:Analysis of Variance; D002508:Cephalometry; D002648:Child; D002675:Child, Preschool; D003936:Diagnosis, Computer-Assisted; D004777:Environment; D005260:Female; D006801:Humans; D008297:Male; D008445:Maxillofacial Development / Q000235:genetics*; D008957:Models, Genetic; D012984:Software; D014430:Twins, Monozygotic