Search results for "taper"
showing 10 items of 48 documents
Preload loss of abutment screws after dynamic fatigue in single implant-supported restorations. A systematic review
2017
Background To carry out a systematic literature review of the causes of preload loss of the abutment screws, of internal and external connection implants, tightened to different torque values and subjected to cyclic loading. Material and methods A systematic search was conducted in PubMed, EMBASE, and Cochrane Library databases with reference to in vitro studies in which internal and external connection implants were subjected to cyclic loads to determine the degree of loosening of the abutment screws after loading. Results The reviewed studies tested distinct implant connections (mostly externally hexed, and morse taper) subjected to diverse cycles (from 16667 to 1 million), with loads ran…
Innovations in endodontic filling materials
2012
One of the goals of endodontic treatment is to achieve a complete, tridimensional, hermetic sealing of the root canal system to prevent the entry of microorganisms or their products through both the coronal and apical pathways. Gutta-percha is the most widely used material for root canal filling and despite its numerous properties, such as biocompatibility and thermoplasticity, it has however an important limit: the lack of adhesion to the canal walls. Attempts to address this problem have been made over the years by using endodontic cements capable of bonding to canal dentine but their tendency to resorption in time can compromise the quality of treatment. The first step towards a real adh…
Tapered drip laterals and manifolds in flat and rectangular irrigation units
2023
Multiple-diameter laterals and manifolds reduce the total cost in microirrigation systems, however, the length of each sublateral should be determined carefully to assure appropriate performance and uniformity of emitter flow rates. The most accurate method is numerical trial and error, which is time-consuming. Many research efforts have been made to propose simple analytical design procedures. By using the power-law form of the Darcy-Weisbach formula, and equal emitters spacing for the sublaterals, Sadeghi et al. (2016) extended a previously introduced design solution for one-diameter laterals to tapered laterals. Recently, a simplified procedure to design dual-diameter drip laterals has b…
CCDC 892312: Experimental Crystal Structure Determination
2016
Related Article: Javier Pitarch-Jarque, Raquel Belda, Salvador Blasco, Pilar Navarro, Roberto Tejero, José Miguel Junquera-Hernández, Vicente Pérez-Mondéjar, Enrique García-España|2016|New J.Chem.|40|5670|doi:10.1039/C5NJ03234B
CCDC 934155: Experimental Crystal Structure Determination
2013
Related Article: Raquel Belda,Salvador Blasco,Begona Verdejo,Hermas R. Jimenez,Antonio Domenech-Carbo,Conxa Soriano,Julio Latorre,Carmen Terencio,Enrique Garcia-Espana|2013|Dalton Trans.|42|11194|doi:10.1039/C3DT51012C
CCDC 205093: Experimental Crystal Structure Determination
2004
Related Article: M.Ruben, E.Breuning, J.-M.Lehn, V.Ksenofontov, F.Renz, P.Gutlich, G.B.M.Vaughan|2003|Chem.-Eur.J.|9|4422|doi:10.1002/chem.200304933
CCDC 637553: Experimental Crystal Structure Determination
2007
Related Article: Xiao-Yu Cao, J.Harrowfield, J.Nitschke, J.Ramirez, A.-M.Stadler, N.Kyritsakas-Gruber, A.Madalan, K.Rissanen, L.Russo, G.Vaughan, J.-M.Lehn|2007|Eur.J.Inorg.Chem.||2944|doi:10.1002/ejic.200700235
CCDC 973771: Experimental Crystal Structure Determination
2014
Related Article: Alexandre Abhervé, Juan Modesto Clemente-Juan, Miguel Clemente-León, Eugenio Coronado, Jaursup Boonmak, Sujittra Youngme|2014|New J.Chem.|38|2105|doi:10.1039/C3NJ01516E
Experimental Tests to Validate a Simple Procedure to Design Dual-Diameter Drip Laterals on Flat Fields
2023
Multiple-diameter laterals reduce the total cost in microirrigation systems, however, the length of each sublateral should be determined carefully to assure appro-priate performance of emitter flow rates. The most accurate method is the numerical trial and error, which is time-consuming. A series of research efforts have been made to propose simple analytical design procedures. By using the power-law form of the Darcy-Weisbach formula, and equal emitters spacing for the sublaterals, Sadeghi et al. (Sadeghi et al. in J Irrig Drain E-ASCE 142:04,016,020, 2016) extended a previously introduced design solution for one-diameter laterals to tapered laterals. Recently, a simplified procedure to de…
Dentinal microcracks after root canal instrumentation using instruments manufactured with different NiTi alloys and the SAF system: A systematic revi…
2021
Aim: The aim of this systematic analysis was to assess the prevalence of dentinal microcracks at various levels (3, 6, and 9 mm from the apex) after using instruments made with conventional, R-Phase, and M-Wire NiTi alloys and the SAF system. Materials and Methods: Electronic searches were conducted in the databases Embase, Cochrane Library, Scopus, PubMed, and Web of Science. To arrange search methods, “MeSH” terms and/or keywords typically associated with the subject were paired with the Boolean operators “AND” and “OR.” Additional searches were conducted on the websites of four separate endodontic journals. After reading the titles and excluding duplicates, 1000 of the 1343 documents ori…