[Studies on the development and growth of the human maxilla--special references to the anterolateral, infratemporal and orbital surfaces].
Morphological and macroscopical studies were made on the lateral surface of the human maxilla. The materials consist of 128 cases of human fetuses ranging from the fourth to the tenth month and 306 cases of human juveniles and adults. The earliest month in which the loci with the scientific name (Nomina Anatomica) of the maxilla was observed was as follows; the frontal process, zygomatic process, anterior nasal spine and the nasal notch were first observed on the fourth fetal month. The infraorbital foramen and anterior lacrimal crest were first observed in some cases on the fourth fetal month and in all cases on the fifth fetal month. The infraorbital suture, lacrimal notch and alveolar process were first observed on the fifth to the sixth fetal month. The infraorbital sulcus and infraorbital canal were first formed on the fifth to the seventh fetal month. The following loci on the lateral surface of the maxilla which are related to the development of the maxillary teeth were first observed after birth as follows; the alveolar foramina were first observed in 3 to 7 years after birth and the maxillary tuberosity was first observed in 6 to 7 years after birth. The canine fossa was first observed in 6 years after birth. As far as the development of the maxilla is concerned, the frontal process and infraorbital margin were first observed and secondly the alveolar part was observed and finally the maxilla body which involved the maxillary sinus was formed.
Yanagi
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Y
Second Department of Anatomy, Hokkaido University School of Medicine, Sapporo, Japan.
D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging / Q000473:pathology*; D000886:Anthropometry; D002648:Child; D002675:Child, Preschool; D005260:Female; D005865:Gestational Age; D006801:Humans; D007223:Infant; D008297:Male; D008437:Maxilla / Q000033:anatomy & histology / Q000196:embryology / Q000254:growth & development*; D008875:Middle Aged