Results 31 to 40 of about 412,503 (375)

A Comparative Assessment of the Performance of Individual Tree Crowns Delineation Algorithms from ALS Data in Tropical Forests

Remote Sensing, 2019
Tropical forest canopies are comprised of tree crowns of multiple species varying in shape and height, and ground inventories do not usually reliably describe their structure.
M. Aubry-Kientz, Raphaël Dutrieux, A. Ferraz, S. Saatchi, Hamid Hamraz, Jonathan Williams, D. Coomes, A. Piboule, Grégoire Laurent Vincent   +8 more
semanticscholar   +1 more source

Fracture Resistance of Zirconia Oral Implants In Vitro: A Systematic Review and Meta-Analysis [PDF]

, 2020
Various protocols are available to preclinically assess the fracture resistance of zirconia oral implants. The objective of the present review was to determine the impact of different treatments (dynamic loading, hydrothermal aging) and implant features (
Bethke, Annalena, Burkhardt, Felix, Kohal, Ralf‐Joachim, Pieralli, Stefano, Spies, Benedikt Christopher, Stein‐Lausnitz, Manja von, Vach, Kirstin   +6 more
core   +1 more source

Choice and substantiation of stable crown shapes in deep-level iron ore mining [PDF]

, 2018
Purpose. The aim of the paper is to select and substantiate stable shapes of crown pillars through determining regularities of rock pressure impacts on their stability depending on the crown shapes, mining depths and iron ore hardness. Methods.
Kalinichenko, O, Kalinichenko, V, Morhun, O, Pysmennyi, S, Stupnik, M   +4 more
core   +1 more source

Effect of Surface Treatment and Cement on Fracture Load of Traditional Zirconia (3Y), Translucent Zirconia (5Y), and Lithium Disilicate Crowns.

Journal of Prosthodontics, 2019
PURPOSE To determine if surface treatment and cement selection for traditional 3 mol% yttria partially stabilized zirconia (3Y-PSZ), "translucent" 5 mol% yttria-stabilized zirconia (5Y-Z), or lithium disilicate crowns affected their fracture load ...
N. Lawson, C. Jurado, Chan-Te Huang, Geoffrey P Morris, J. Burgess, Perng‐Ru Liu, K. Kinderknecht, C. Lin, D. Givan   +8 more
semanticscholar   +1 more source

Effect of recasting on the thickness of metal-ceramic interface of nickel-chromium and cobalt-chromium alloys [PDF]

Vojnosanitetski Pregled, 2008
Introduction/Aim. This research was done to establish recasting effects of nickel-chromium and cobalt-chromium alloys on the thickness of their metal-ceramic interface in making fixed partial dentures.
Mirković Nemanja, Draganjac Miroslav, Stamenković Dragoslav, Ristić Ljubiša   +3 more
doaj   +1 more source

Effects of substrate, ceramic thickness, translucency, and cement shade on the color of CAD/CAM lithium-disilicate crowns.

Journal of Esthetic and Restorative Dentistry, 2019
OBJECTIVE The aim of this in vitro study was to evaluate the effects of substrate colors, different levels of ceramic thickness and translucency, and cement shades on the color difference from a reference color of lithium-disilicate crowns.
Alexandra Czigola, E. Ábrám, Z. Kovács, K. Márton, P. Hermann, J. Borbély   +5 more
semanticscholar   +1 more source

Effect of Resin Bonded Luting Agents Influencing Marginal Discrepancy in All Ceramic Complete Veneer Crowns.

Journal of clinical and diagnostic research : JCDR, 2016
INTRODUCTION Marginal discrepancy severely affects the long term success of All ceramic complete veneer crowns. The precise role of resin luting agents influencing this phenomenon needs to be explored further.
Dhanraj Ganapathy, A. Sathyamoorthy, Hemalatha Ranganathan, Karthikeyan Murthykumar   +3 more
semanticscholar   +1 more source

Comparing the Effectiveness of GLUMA and 940 nm Laser for Improving Crown Retention with Self-Adhesive Cement [PDF]

Journal of Dentistry
Statement of the Problem: The retention of dental crowns plays a pivotal role in their long-term success and maintenance. According to the ongoing controversy about the effect of GLUMA desensitizer and diode laser on the retention of full metal crowns ...
Pantea Amiri, Ghazale Tekie, Arash Azizi, Shirin Lawaf   +3 more
doaj   +1 more source

The Distribution of Saperda Inornata and Oberea Schaumii (Coleoptera: Cerambycidae) within the Crowns of Large Trembling Aspens, Populus Tremuloides [PDF]

, 2017
The larvae of Saperda inornata Say and Oberea schaumii LeConte inhabit the stems of trembling aspen (Populus tremuloides Michaux) root suckers and the twigs of larger trees. Nord et al.
Knight, Fred B., Nord, John C.
core   +3 more sources

EXPLORING THE USE OF PULSED ERBIUM LASERS TO RETRIEVE A ZIRCONIA CROWN FROM A ZIRCONIA IMPLANT ABUTMENT [PDF]

, 2020
Removal of zirconia crowns, commonly used as cement-retained implant fixed restorations, can be challenging. Conventional methods of crown removal are time consuming and often leave irreparable damage to the crown, which can be costly to patients and ...
Elkharashi, Ahmed
core   +1 more source