A characteristic pattern of dental anomalies including cone-shaped premolars, multitubercular molar crowns, pyramidal molar roots with single root canals, shovel-shaped incisors with palatal invaginations and hypodontia usually described as lobodontia was recognised as a separate entity. Only a few family reports on this condition have been published until now. The prevalence of the condition i...

Pterocarpus angolensis DC and Bobgunnia madagascariensis (Desv.) J. H. Kirkbr. & Wiersema are two hardwood species found in Miombo woodland. Crown size, being closely related to the photosynthetic capacity of a tree, is an important parameter studies growth individual trees. In this sense, present study aimed morphometric relationships P. B. as resource describe features these species. Data...

The complexation reactions between Tl+ and Pb2+ ions and crown ethers 12-crown-4(12C4), 15-crown-5 (15C5), benzo-15-crown-5 (B15C5), 18-crown-6 (18C6), dicyclohexyl-18-crown-6 (DC18C6) and aza-18-crown-6 (A18C6) were studied in 90% acetonitrile and 90% ethanol solutions at 25 °C, using an a.c. polarographic technique. The stoichiometry and stability of the complexes we...

A 7-m tall white ash tree (Fraxinus americana Marsh.) was dissected, and hydraulic parameters of the xylem were determined by inducing a steady-state flow of water through the stem segments and monitoring volume and velocity flow rates. Leaf-specific conductivity (LSC) was highest in the main stem and lowest in some of the leaf-bearing lateral shoots. The LSC was higher in the main stem than in...

• Design and simulation by FEM of customized scaffolds fixed to the jaw a dental implant. Distribution stress in crown, implant, scaffold, cortical trabecular bone, strain bone. Influence porosity hole size on The use allows significant reduction stresses peri-implant Teeth loss due periodontal diseases, trauma, or infections often causes dimensional affected maxillary. In patients with reduced...

Premise Epiphytes have commensal relationships with their host trees. Besides the influence of tree traits, little has been discussed concerning ecology epiphytes in disturbed habitats (e.g., pasture). We herein tested whether occurrences pasture and forest specialist pastures are affected differently by traits. hypothesized that (H1) richness abundance generalist would be positively associated...

Crown class, an ordinal tree-level mensuration attribute used extensively by foresters, is di#icult to ass ign in thefield because def ini t ions of individual classes are confounded by ambiguous references to the position the tree in the canopy and amount of light received by its crown. When crown class is decomposed into its two elements-crown position and crown light exposure--field assignme...

Although there have been numerous studies of the extent to which the crown dimensions of the permanent teeth are correlated (MOORREES and REED, Arch Oral Biol 9:685, 1964; GARN, LEWIS and KEREWSKY, J Dent Res 44:350, 1965) comparable information on deciduous tooth dimensional communalities is meagre. Moreover, it is not known whether the crown dimensions of the deciduous teeth show different pa...

This study uses elliptical Fourier analysis to quantify shape differences observed in the P(4) crown of Neandertals and anatomically modern humans. Previously, P(4) shape was assessed qualitatively, and results suggested marked differences between Neandertals and anatomically modern humans (Bailey [2002] New Anat. 269:148-156). The goal of this study was to investigate the P(4) shape in more de...