Document Detail


In vivo wear pattern of experimental light-cured hybrid composite resins.
MedLine Citation:
PMID:  8004917     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
This study evaluated the effect of various types of microfiller on the in vivo wear resistance of composite resins. Experimental light-cured composites with two different microfiller systems were prepared: (1) 56 wt % fine quartz filler, 21 wt% organic filler and 3 wt% colloidal silica filler (Hybrid type 1), and (2) 64 wt% fine quartz filler and 21 wt% colloidal silica filler (Hybrid type 2). The resin monomer consisted of 50 wt % Bis-GMA and 50 wt% TEGDMA. These materials were placed in 2 mm diameter cylindrical cavities located in the OCA (occlusal contact area) or the CFA (contact free area) in cast gold-silver-palladium alloy full coverage crowns, which were temporarily set in a volunteer patient's mouth. The crowns were removed at monthly intervals for SEM observation. Hybrid type 1, which contained organic fillers, showed bulk fractures in the OCA, by the second month of the experiment. However, reinforcement of the resin matrix by dispersion of microfiller provided Hybrid type 2 with superior wear resistance for up to two months.
Authors:
A Okamoto; K Sekiya; M Fukushima; M Iwaku
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Publication Detail:
Type:  Comparative Study; Journal Article    
Journal Detail:
Title:  Dental materials journal     Volume:  12     ISSN:  0287-4547     ISO Abbreviation:  Dent Mater J     Publication Date:  1993 Dec 
Date Detail:
Created Date:  1994-07-20     Completed Date:  1994-07-20     Revised Date:  2006-11-15    
Medline Journal Info:
Nlm Unique ID:  8309299     Medline TA:  Dent Mater J     Country:  JAPAN    
Other Details:
Languages:  eng     Pagination:  225-32     Citation Subset:  D    
Affiliation:
Department of Operative Dentistry and Endodontics, Niigata University School of Dentistry, Japan.
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MeSH Terms
Descriptor/Qualifier:
Adult
Bisphenol A-Glycidyl Methacrylate
Composite Resins / chemistry*
Crowns
Dental Restoration, Permanent / methods*
Humans
Microscopy, Electron, Scanning
Particle Size
Polyethylene Glycols
Polymethacrylic Acids
Quartz
Silicon Dioxide
Surface Properties
Chemical
Reg. No./Substance:
0/Composite Resins; 0/Polyethylene Glycols; 0/Polymethacrylic Acids; 109-16-0/triethylene glycol dimethacrylate; 14808-60-7/Quartz; 1565-94-2/Bisphenol A-Glycidyl Methacrylate; 7631-86-9/Silicon Dioxide

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine


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