Document Detail

The effect of different storage conditions and duration on the fracture strength of three types of translucent fiber posts.
MedLine Citation:
PMID:  18061255     Owner:  NLM     Status:  MEDLINE    
OBJECTIVES: (a) To evaluate the effects of storage duration, storage condition and type of fiber post on post fracture strength. (b) To morphologically evaluate the post structure before and after storage. METHODS: Three types of fiber posts were divided in different groups (n=14) according to the storage duration (1, 6, 12 months), and storage condition (dry at 37 degrees C; saline water at 37 degrees C; mineral oil at 37 degrees C and storage inside the roots of extracted human teeth immersed in saline water at 37 degrees C). Specimens were loaded in a universal testing machine with a compressive load until fracture. A 3-way ANOVA and Tukey's test (alpha=.05) were used to compare the effect of the experimental factors on the fracture strength. Two posts of each group were observed before and after the storage using a scanning electron microscope. RESULTS: Storage conditions and post type, had a significant effect on post fracture strength (p<0.05). The interaction between these factors was significant (p<0.05). Water storage significantly decreased the fracture strength, regardless of the post type and the storage duration. Storage inside roots, in oil, and at dry conditions did not significantly affect post fracture strength. SEM micrographs revealed voids between fibers and resin matrix for posts stored in water. Posts stored under the other conditions showed a compact matrix without porosities. SIGNIFICANCE: Fiber posts placed inside human root canals immersed in water are not affected by the detrimental effect of water.
Alessandro Vichi; Michele Vano; Marco Ferrari
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Publication Detail:
Type:  Comparative Study; Journal Article     Date:  2007-12-03
Journal Detail:
Title:  Dental materials : official publication of the Academy of Dental Materials     Volume:  24     ISSN:  0109-5641     ISO Abbreviation:  Dent Mater     Publication Date:  2008 Jun 
Date Detail:
Created Date:  2008-04-25     Completed Date:  2008-08-19     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8508040     Medline TA:  Dent Mater     Country:  England    
Other Details:
Languages:  eng     Pagination:  832-8     Citation Subset:  D    
Department of Restorative Dentistry and Dental Materials, University of Siena, Policlinico Le Scotte, Viale Bracci, 53100 Siena, Italy.
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MeSH Terms
Compressive Strength
Dental Materials / chemistry*
Dental Pulp Cavity
Dental Restoration Failure
Epoxy Resins / chemistry
Glass / chemistry
Materials Testing
Methacrylates / chemistry
Microscopy, Electron, Scanning
Mineral Oil / chemistry
Post and Core Technique / instrumentation*
Quartz / chemistry
Resin Cements / chemistry
Sodium Chloride / chemistry
Stress, Mechanical
Surface Properties
Time Factors
Reg. No./Substance:
0/Calibra; 0/Dental Materials; 0/Epoxy Resins; 0/Methacrylates; 0/Resin Cements; 0/fiberglass; 14808-60-7/Quartz; 7647-14-5/Sodium Chloride; 8020-83-5/Mineral Oil

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

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