Fracture patterns of glass-ionomer cement overlays versus stainless steel bands during endodontic treatment: an ex-vivo study

Aim To compare fracture patterns of posterior teeth temporized with: mesio‐occlusal‐distal (MOD) glass–ionomer cement (GIC) interim restorations, stainless steel (SS) bands, GIC dome overlays and GIC dome overlays with occlusal temporary restorations. Methodology The root canals of 92 extracted huma...

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Bibliographic Details
Published in:International endodontic journal 2013-12, Vol.46 (12), p.1115-1124
Main Authors: Pakdeethai, S., Abuzar, M., Parashos, P.
Format: Article
Language:English
Subjects:
Dentistry
endodontically treated teeth
Glass Ionomer Cements
glass-ionomer cement overlays
Humans
In Vitro Techniques
interim restorations
Materials Testing
Root Canal Preparation
Stainless Steel
stainless steel bands
temporary restorations
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Summary:Aim To compare fracture patterns of posterior teeth temporized with: mesio‐occlusal‐distal (MOD) glass–ionomer cement (GIC) interim restorations, stainless steel (SS) bands, GIC dome overlays and GIC dome overlays with occlusal temporary restorations. Methodology The root canals of 92 extracted human premolars and molars were prepared with rotary NiTi instruments and dressed with calcium hydroxide paste prior to cavity preparation for standardized MOD restorations. Teeth were divided into four groups (n = 23) and temporarily restored with: GIC interim restorations (GIC group), stainless steel bands (SS group), GIC dome overlays (GIC‐O group) or GIC dome overlays with intermediate restorative material (IRM) in the access cavities (GIC‐IRM group). Teeth were subjected to compressive axial load until fracture; fracture forces and fracture modes were recorded. Statistical analysis included Kaplan–Meier plots, Cox proportional hazards model, one‐way analysis of variance, chi‐square and Fisher's exact tests. Results There was a significantly higher risk of failure in the GIC group compared with the SS (P 
ISSN:0143-2885
1365-2591
DOI:10.1111/iej.12102