OBJECTIVES The aim of this study was to investigate the possibility to use high-frequency ultrasound imaging for the assessment of periodontal structures. MATERIAL AND METHODS A commercially available ultrasound scanner (Ultrasonix SonoTouch) with a linear 1.5 cm footprint, wideband 8 - 40MHz transducer was used, with external transcutaneous approach. A number of 4 patients with healthy perio...

The crown architecture of three shade-tolerant tree species (two subcanopy and one mid-canopy) was analyzed in relation to the light regime of the forest understorey. The aim was to examine to which extent shade-tolerant species variate in their crown architecture. Tree saplings (265) between 50 and 300 cm height, and distributed from understorey to variously-sized canopy gaps, were measured fo...

the aim of study was to evaluate qualitative and quantitative characteristics of old trees in pattom and namkhaneh districts in the nowshahr, northern iran. the trees quantitative characteristics of dbh, total height, slenderness coefficient, trunk height, crown length, buttress height, and canopy cover area and qualitative characteristics of crown and trunk, i.e., health, vitality, and concurr...

PURPOSE The aim of this study was to evaluate interproximal papillae and clinical crown height following the placement of single-tooth implants according to early and delayed protocols. MATERIALS AND METHODS Forty-five patients were randomly allocated to either the "early" group or the "delayed" group. They were treated with a single-tooth acid-etched Osseotite implant in the maxillary or man...

The overall goal of this study was to develop methods for assessing crown base height for individual trees using airborne lidar data in forest settings typical for the southeastern United States. More specific objectives are to: (1) develop new lidar-derived features as multiband height bins and processing techniques for characterizing the vertical structure of individual tree crowns; (2) inves...

Large, late-winter ptarmigan migrations heavily impact the shoot, plant, and patch architecture of shrubs that remain above the snow surface. Ptarmigan browsing on arctic shrubs was assessed in the vicinity of Toolik Lake, on the north side of the Brooks Range in Alaska. Data were collected in early May 2007, at maximum snow depth, after the bulk of the ptarmigan migration had passed through th...

The European vines pale swallowwort and black swallowwort are invading various habitats in northeastern North America. It is unclear how these plants might respond to potential biological control agents, as they experience little herbivore damage in North America, or longer durations of mowing given the reported lack of efficacy of mechanical control. We evaluated the effect of six seasons of a...

background: palmaris longus (pl) is a muscle with marked variations. it is harvested as a tendon graft in many surgical proceduresin which a certain length of tendon is required. the aims of the present study were to determine the variations of this tendon in iranian population and to find whether the length of pl tendon could be estimated by measuring the forearm length and height.   methods: ...

In this study the quantification of biomass within all relevant compartments of a three-year-old poplar clone (P. maximowicii × P. trichocarpa) planted on abandoned agricultural land at a density of 5000 trees ha −1 is presented. A total of 30 trees within a diameter range of 1.8 cm to 8.9 cm, at breast height (dbh at 1.3 m), were destructively sampled. In order to analyze the biomass, the comp...