Fracture resistance of root filled molar teeth restored with glass fibre bundles

Rodrigues FB, Paranhos MPG, Spohr AM, Oshima HMS, Carlini B, Burnett LH Jr. Fracture resistance of root filled molar teeth restored with glass fibre bundles. International Endodontic Journal, 43, 356–362, 2010. Aim To evaluate the effect of unidirectional or woven glass fibre tapes inserted into MO...

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Published in:	International endodontic journal Vol. 43; no. 5; pp. 356 - 362
Main Authors:	Rodrigues, F. B., Paranhos, M. P. G., Spohr, A. M., Oshima, H. M. S., Carlini, B., Burnett Jr, L. H.
Format:	Journal Article
Language:	English
Published:	Oxford, UK Blackwell Publishing Ltd 01-05-2010
Subjects:	Acid Etching, Dental Bisphenol A-Glycidyl Methacrylate - chemistry composite resin Composite Resins - chemistry Compressive Strength Dental Cavity Preparation - methods Dental Enamel - injuries Dental Materials - chemistry Dental Pulp Cavity - injuries Dental Restoration, Permanent - methods Dental Stress Analysis - instrumentation Dentistry endodontic therapy fracture resistance Glass - chemistry glass fibre Glass Ionomer Cements - chemistry Gutta-Percha - therapeutic use Humans Maleates - chemistry Materials Testing Molar - injuries Molar - pathology molar teeth Root Canal Filling Materials - therapeutic use Root Canal Therapy - methods Stress, Mechanical Tooth Fractures - physiopathology Tooth, Nonvital - therapy
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Summary:	Rodrigues FB, Paranhos MPG, Spohr AM, Oshima HMS, Carlini B, Burnett LH Jr. Fracture resistance of root filled molar teeth restored with glass fibre bundles. International Endodontic Journal, 43, 356–362, 2010. Aim To evaluate the effect of unidirectional or woven glass fibre tapes inserted into MOD cavity preparations on the fracture resistance of root filled molar teeth. Methodology Extracted human molar teeth were randomly divided into six groups (n = 15) : G1 – sound teeth, control; G2 – MOD cavity preparation; G3 – MOD + root canal treatment (Endo); G4 – MOD + Endo + composite resin restoration (Resin); G5 – MOD + Endo + unidirectional fibre (UF) + Resin; G6 – MOD + ;Endo + woven fibre (WF) + Resin. The teeth were subjected to a compressive fracture test in a universal testing machine. After testing, two failure modes were classified: pulp chamber floor or cusp. Results The highest and the lowest mean fracture strengths were found in sound teeth (G1) (4960N) and MOD + root canal treatment (G3) (612.84N), respectively, with significant differences from the other groups (P < 0.05). The remaining groups had statistically similar means. In G5 and G6, there was a tendency for fracture to occur in the pulp chamber floor compromising tooth integrity. Conclusions The insertion of glass fibres into MOD cavity preparations and restoring them with composite resin was not different than molar teeth filled with composite resin only in terms of fracture resistance. Fibres placed into MOD cavities do not reinforce teeth.
Bibliography:	istex:9938C5076EF3C6699040006C3179C6865909C32A ArticleID:IEJ1666 ark:/67375/WNG-PZ4LR3QP-Q ObjectType-Article-2 SourceType-Scholarly Journals-1 ObjectType-News-1 ObjectType-Feature-3 content type line 23 ObjectType-Feature-1
ISSN:	0143-2885 1365-2591
DOI:	10.1111/j.1365-2591.2009.01666.x