An In Vivo and Cone Beam Computed Tomography Investigation of the Accuracy in Measuring Alveolar Bone Height and Detecting Dehiscence and Fenestration Defects.

Purpose: To investigate cone beam computed tomography (CBCT) accuracy in measuring facial bone height and detecting dehiscence and fenestration defects around teeth.

Materials And Methods: Patients who were treatment planned for periodontal flap or dental implant surgeries were enrolled (n = 25). CBCT imaging (Carestream CS 9300) was obtained at 0.

A hierarchical analysis of the interactive effects of elevated CO2 and water availability on the nitrogen and transpiration productivities of velvet mesquite seedlings.

In this study we apply new extensions of classical growth analysis to assess the interactive effects of elevated CO2 and differences in water availability on the leaf-nitrogen and transpiration productivities of velvet mesquite (Prosopis velutina Woot.) seedlings. The models relate transpiration productivity (biomass gained per mass of water transpired per day) and leaf-nitrogen productivity (biomass gain per unit leaf N per day) to whole-plant relative growth rate (RGR) and to each other, allowing a comprehensive hierarchical analysis of how physiological and morphological responses to the treatments interact with each other to affect plant growth.

Reconciling the apparent difference between mass- and area-based expressions of the photosynthesis-nitrogen relationship.

The relationship between photosynthetic carbon assimilation (A ) and leaf nitrogen content (N ) can be expressed on either a leaf area basis (A vs N ) or a leaf mass basis (A vs N ). Dimensional analysis shows that the units for the slope of this relationship are the same for both expressions (μmol [CO] g [N] s). Thus the slope measures the change in CO assimilation per gram of nitrogen, independent of leaf mass or leaf area.