Mechanical properties and microstructures of glass-ionomer cements (Record no. 52904)

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fixed length control field 03241nam a2200241Ia 4500
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control field MX-MdCICY
005 - DATE AND TIME OF LATEST TRANSACTION
control field 20250625162418.0
040 ## - CATALOGING SOURCE
Transcribing agency CICY
090 ## - LOCALLY ASSIGNED LC-TYPE CALL NUMBER (OCLC); LOCAL CALL NUMBER (RLIN)
Classification number (OCLC) (R) ; Classification number, CALL (RLIN) (NR) B-18758
008 - FIXED-LENGTH DATA ELEMENTS--GENERAL INFORMATION
fixed length control field 250602s9999 xx |||||s2 |||| ||und|d
245 10 - TITLE STATEMENT
Title Mechanical properties and microstructures of glass-ionomer cements
490 0# - SERIES STATEMENT
Volume/sequential designation Dental Materials, 16, p.129-138, 2000
520 3# - SUMMARY, ETC.
Summary, etc. Objective: The objective of this study was to determine the flexural strength (FS), compressive strength (CS), diametral tensile strength (DTS), Knoop hardness (KHN)and wear resistance of ten commercial glass-ionomer cements (GICs). The fracture surfaces of these cements were examined using scanning electron microscopic (SEM)techniques to ascertain relationships between the mechanical properties and microstructures of these cements. Methods: Specimens were fabricated according to the instructions from each manufacturer. The FS, CS, DTS, KHN and wear rate were measured after conditioning the specimens for 7 d in distilled water at 378C. One-way analysis of variance with the post hoc Tukey-Kramer multiple range test was used to determine which specimen groups were significantly different for each test. The fracture surface of one representative specimen of each GIC from the FS tests was examined using a scanning electron microscope. Results: The resin-modified GICs (RM GICs)exhibited much higher FS and DTS, not generally higher CS, often lower Knoop hardness and generally lower wear resistance, compared to the conventional GICs (C GICs). Vitremer (3M)had the highest values of FS and DTS; Fuji II LC (GC International)and Ketac-Molar (ESPE)had the highest CS; Ketac-Fil (ESPE)had the highest KHN. Ketac-Bond (ESPE)had the lowest FS; a-Silver (DMG-Hamburg)had the lowest CS. Four GICs (a-Fil (DMG-Hamburg), a-Silver, Ketac-Bond and Fuji II)had the lowest values of DTS, which were not significantly different from each other; a-Silver and Ketac-Silver had the lowest values of KHN. The highest wear resistance was exhibited by a-Silver and Ketac-Fil; F2LC had the lowest wear resistance. The C GICs exhibited brittle behavior, whereas the RM GICs underwent substantial plastic deformation in compression. The more integrated the microstructure, the higher were the FS and DTS. Higher CS was correlated with smaller glass particles, and higher KHN was found where there was a combination of smaller glass particles and lower porosity. Larger glass particle sizes and a more integrated microstructure contributed to a higher wear resistance. Significance: The mechanical properties of GICs were closely related to their microstructures. Factors such as the integrity of the interface between the glass particles and the polymer matrix, the particle size, and the number and size of voids have important roles in determining the mechanical properties.
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element GLASS-IONOMER CEMENTS
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element MECHANICAL PROPERTIES
650 14 - SUBJECT ADDED ENTRY--TOPICAL TERM
Topical term or geographic name entry element MICROSTRUCTURES
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Xiea, D.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Brantleyb, W.A.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Culbertsonb, B.M.
700 12 - ADDED ENTRY--PERSONAL NAME
Personal name Wanga, G.
856 40 - ELECTRONIC LOCATION AND ACCESS
Uniform Resource Identifier <a href="https://drive.google.com/file/d/1r6hx-vtEoQD6-ywDL6n2jVM_At-4VEAR/view?usp=drivesdk">https://drive.google.com/file/d/1r6hx-vtEoQD6-ywDL6n2jVM_At-4VEAR/view?usp=drivesdk</a>
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  Clasificación local     Ref1 CICY CICY Documento préstamo interbibliotecario 25.06.2025   B-18758 25.06.2025 25.06.2025 Documentos solicitados