EVER since Gregory and Hellman, the number of cusps on the molar teeth and the pattern of the occlusal grooves have been used as taxonomic criteria in the assessment of hominid and hominoid remains 1,2 . Both the number of cusps (4, 5 or 6) and the groove pattern (+ or Y ) have ...
Multiple developmental pathways produce the same numbers of cusps, despite highly variable cusp morphologies, indicating the existence of limits on how morphological evolution can fill a morphospace defined by cusp numbers. These constraints are both developmental and phylogenetic in nature and the ...
1)number of root tips as diameter under 1 mm根尖数 2)periapical index根尖周指数 1.The curative effects were evaluated based on clinical examination and radiographic assessment using periapical index(PAI).采用根尖周指数(periapical index,PAI)评定X线片并结合临床检查,对疗效进行评价。 3)digital periapica...
Clinical examination was done, and the morphological details of the crown (the number of cusps) were recorded. Dental casts of the mandibular teeth were made. The occlusal grooves were highlighted by using Indian ink and observed under the 2脳 magnification for the groove pattern (+ or y type...
titanium aluminides based on TiAlheat treatmentmicrostructureMutations in members of the ectodysplasin (TNF-related) signalling pathway, EDA, EDAR, and EDARADD in mice and humans produce an ectodermal dysplasia phenotype that includes missing teeth and smaller teeth with reduced cusps. Using the ...
anterior buccal sEK, the first sEK, is derived from the pEK.58and consists of non-proliferating cells consistent with the pEK, whereas the second sEK established throughde novosignalling contains dividing cells.59All sEKs are located in the inner enamel epithelial region where the tooth cusps ...
Multiple developmental pathways produce the same numbers of cusps, despite highly variable cusp morphologies, indicating the existence of limits on how morphological evolution can fill a morphospace defined by cusp numbers. These constraints are both developmental and phylogenetic in nature and the ...