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Pubertal growth of the cephalometric point gnathion: Multilevel models for boys and girls
Author(s) -
Buschang Peter H.,
Tanguay Richard,
Demirjian Arto,
Lapalme Lise,
Goldstein Harvey
Publication year - 1988
Publication title -
american journal of physical anthropology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.146
H-Index - 119
eISSN - 1096-8644
pISSN - 0002-9483
DOI - 10.1002/ajpa.1330770307
Subject(s) - growth velocity , girl , mathematics , growth curve (statistics) , cephalometry , orthodontics , medicine , psychology , statistics , developmental psychology , endocrinology
Two‐level polynomial models are used to summarize the amount Sella‐Gnathion (S‐Gn) and direction Nasion‐Sella‐Gnathion (N‐S‐Gn) of growth changes for the cephalometric landmark gnathion. Growth descriptions pertain to a mixed longitudinal sample of 209 French‐Canadian children 10–15 years of age. The boy's growth curve attains mean minimum prepubertal velocity at 10.8 years and maximum pubertal velocity at 14.1 years. The girl's curve follows a cubic pattern, attaining maximum pubertal velocity at 12.1 years. Boys are larger than girls throughout the age range. Variation between‐subjects increases with age in a curvilinear fashion. Growth direction of gnathion is more horizontally directed for girls than boys. Small but significant changes in growth direction occur between 10 and 15 years of age.