Evaluation of load at fracture of Procera AllCeram copings using different luting cements.
OBJECTIVE
The current study investigated the effect of different luting agents on the fracture resistance of Procera AllCeram copings.


METHODS
Six master dies were duplicated from the prepared maxillary first premolar tooth using nonprecious metal alloy (Wiron 99). Thirty copings (Procera AllCeram) of 0.6-mm thickness were manufactured. Three types of luting media were used: zinc phosphate cement (Elite), glass ionomer cement (Fuji I), and dual-cured composite resin cement (Panavia F). Ten copings were cemented with each type. Two master dies were used for each group, and each of them was used to lute five copings. All groups were cemented according to manufacturer's instructions and received a static load of 5 kg during cementation. After 24 hours of distilled water storage at 37 degrees C, the copings were vertically compressed using a universal testing machine at a crosshead speed of 1 mm/min.


RESULTS
ANOVA revealed significant differences in the load at fracture among the three groups (p < 0.001). The fracture strength results showed that the mean fracture strength of zinc phosphate cement (Elite), glass ionomer cement (Fuji I), and resin luting cement (Panavia F) were 1091.9 N, 784.8 N, and 1953.5 N, respectively.


CONCLUSIONS
Different luting agents have an influence on the fracture resistance of Procera AllCeram copings.
Postgraduate Student, Department of Conservative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, MalaysiaHead, Department of Conservative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, MalaysiaDean, Department of Restorative Dentistry, Faculty of Dentistry, Universiti Teknologi MARA, Shah Alam, Malaysia.
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BMA
Al-Makramani
Postgraduate Student, Department of Conservative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, MalaysiaHead, Department of Conservative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, MalaysiaDean, Department of Restorative Dentistry, Faculty of Dentistry, Universiti Teknologi MARA, Shah Alam, Malaysia.
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Razak
Postgraduate Student, Department of Conservative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, MalaysiaHead, Department of Conservative Dentistry, Faculty of Dentistry, University of Malaya, Kuala Lumpur, MalaysiaDean, Department of Restorative Dentistry, Faculty of Dentistry, Universiti Teknologi MARA, Shah Alam, Malaysia.
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MI
Abu-Hassan
D000537:Aluminum Oxide / Q000737:chemistry*; D001641:Bicuspid; D002484:Cementation; D002858:Chromium Alloys / Q000737:chemistry; D003188:Composite Resins / Q000737:chemistry; D003442:Crowns; D003738:Dental Cements / Q000737:chemistry*; D003776:Dental Porcelain / Q000737:chemistry*; D019232:Dental Restoration Failure; D005899:Glass Ionomer Cements / Q000737:chemistry; D006801:Humans; D008422:Materials Testing; D008855:Microscopy, Electron, Scanning; D003765:Models, Dental; D019279:Resin Cements / Q000737:chemistry; D013314:Stress, Mechanical; D013499:Surface Properties; D013696:Temperature; D013997:Time Factors; D014867:Water / Q000737:chemistry; D015036:Zinc Phosphate Cement / Q000737:chemistry
C105314:AllCeram; D002858:Chromium Alloys; D003188:Composite Resins; D003738:Dental Cements; D005899:Glass Ionomer Cements; C438843:Panavia-Fluoro; D019279:Resin Cements; D014867:Water; D003776:Dental Porcelain; C084541:Fuji glass-ionomer lining cement; D015036:Zinc Phosphate Cement; D000537:Aluminum Oxide