Wataru Morita

Wataru Morita
National Museum of Nature and Science | NMNS · Department of Anthropology

Doctor of Philosophy

About

20
Publications
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155
Citations

Publications

Publications (20)
Article
Full-text available
Tooth development is governed largely by epithelial–mesenchymal interactions and is mediated by numerous signaling pathways. This type of morphogenetic processes has been explained by reaction–diffusion systems, especially in the framework of a Turing model. Here we focus on morphological and developmental differences between upper and lower molars...
Article
Background Tooth identification is important not only for anatomists and anthropologists but also for dental practitioners and dental students studying dental anatomy courses. This review paper provides an overview of the significance of tooth identification focusing on the morphological and developmental background. Highlight The process of tooth...
Article
Full-text available
Ptch receptors 1 and 2 mediate Hedgehog signaling pivotal for organ development and homeostasis. In contrast to embryonic lethal Ptch1 −/− phenotype, Ptch2 −/− mice display no effect on gross phenotype. In this brief report, we provide evidence of changes in the putative incisor mesenchymal stem cell (MSC) niches that contribute to accelerated inci...
Article
This study examined the occurrence of carious lesions and antemortem tooth loss (AMTL) in skeletal remains from Pacopampa, a Formative period site in Peru. We sought to identify variations in carious lesions and AMTL within and between groups to uncover insights into social stratification and subsistence. Targets were permanent teeth and alveoli fr...
Article
Full-text available
A major challenge in evolutionary developmental biology is to understand how genetic mutations underlie phenotypic changes. In principle, selective pressures on the phenotype screen the gene pool of the population. Teeth are an excellent model for understanding evolutionary changes in the genotype-phenotype relationship since they exist throughout...
Article
Metameric variation of molar size is in part associated with the dietary adaptations of mammals and results from slight alterations of developmental processes. Humans and great apes exhibit conspicuous variation in tooth morphology both between taxa and across tooth types. However, the manner in which metameric variation in molars emerged among ape...
Article
Full-text available
Chondroitin sulfate (CS) proteoglycan is a major component of the extracellular matrix and plays an important part in organogenesis. To elucidate the roles of CS for craniofacial development, we analyzed the craniofacial morphology in CS N-acetylgalactosaminyltransferase-1 (T1) gene knockout (KO) mice. T1KO mice showed the impaired intramembranous...
Article
Epidemiological research has suggested that birth weights are correlated with adult leg lengths. However, the relationship between prenatal undernutrition (UN) and postnatal leg growth remains controversial. We investigated the effects of UN during early pregnancy on postnatal hindlimb growth and determined whether early embryonic malnutrition affe...
Article
In Primates, enamel thickness variation stems from an evolutionary interplay between functional/adaptive constraints (ecology) and the strict control mechanisms of the morphogenetic program. Most studies on primate enamel thickness have primarily considered the permanent teeth, while the extent of covariation in tooth enamel thickness distribution...
Article
Full-text available
Clarifying morphological variation among African and Eurasian hominoids during the Miocene is of particular importance for inferring the evolutionary history of humans and great apes. Among Miocene hominoids, Nakalipithecus and Ouranopithecus play an important role because of their similar dates on different continents. Here, we quantify the lower...
Article
Human molars exhibit a type of metameric variation, which is the difference in serially repeated morphology within an organism. Various theories have been proposed to explain how this variation is brought about in the molars. Actualistic data that support the theories, however, are still relatively scarce because of methodological limitations. Here...
Article
There are no available detailed data on the three-dimensional courses of the human superior alveolar nerves and vessels. This study aimed to clarify the relationships of the maxillary sinus with the superior alveolar nerves and vessels using cone-beam computed tomography (CT) combined with μ-CT and histological analyses. Digital imaging and communi...
Article
Background The basement membrane between the inner enamel epithelium and the dental mesenchyme in the tooth germ is preserved in a fully formed tooth crown as the enamel­–dentine junction (EDJ). The outer enamel surface (OES) is a culmination of enamel deposition above this basement membrane. The EDJ and OES are used extensively in studies of syste...
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Tooth crown patterning is governed by the growth and folding of the inner enamel epithelium (IEE) and the following enamel deposition forms outer enamel surface (OES). We hypothesized that overall dental crown shape and covariation structure are determined by processes that configurate shape at the enamel-dentine junction (EDJ), the developmental v...
Article
Under the patterning cascade model (PCM) of cusp development inspired by developmental genetic studies, it is predicted that the location and the size of later-forming cusps are more variable than those of earlier-forming ones. Here we assessed whether differences in the variability among cusps in total and each particular crown component (enamel-d...
Article
The Edo-period (AD 1603–1867) human skeletal remains were excavated from the Unseiji site in Akashi, Japan. The inscription of the gravestone suggested that the individual was a grandmother of a chief retainer of the Akashi clan. Because the accumulation of anthropological data for high-status persons in the Edo period is important for future studi...
Article
A gradual population increase accompanying climate cooling has been evinced as having occurred in western Japan during the Middle (ca. 5000–4000 years BP) to Late-Final Jomon period (ca. 4000–2300 years BP). We test the hypothesis that this population change paralleled increasing human migration. We also test the archaeological hypothesis that type...
Article
This study investigated interpopulation genetic relationships in the Jomon Atsumi Peninsula area, comparing the pattern of human migration revealed by strontium isotope ratio with dental metric variation of Yoshigo and Inariyama skeletal remains. Morphological differences were evaluated between the local and immigrant groups to determine whether or...
Article
The Pacopampa site is located in the northern highlands of Peru and is an archaeological site belonging to the Formative Period (2500-1 BC). The excavation of the Pacopampa site yielded unusual human skeletons from the main platform of a ceremonial center of the site during the 2009 field season. The skeletal remains were associated with a pair of...

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