title: Comparison of the load at fracture of Turkom-Cera to Procera AllCeram and In-Ceram all-ceramic restorations.
abstract: OBJECTIVE
  This study investigated the occlusal fracture resistance of Turkom-Cerafused alumina compared to Procera AllCeram and In-Ceram all-ceramic restorations.
  
  
  METHODS
  Sixmaster dies were duplicated from the prepared maxillary first premolar tooth using nonprecious metal alloy (Wiron 99). Ten copings of 0.6 mm thickness were fabricated from each type of ceramic, for a total of thirty copings. Two master dies were used for each group, and each of them was used to lute five copings. All groups were cemented with resin luting cement Panavia F 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
  The results of the present study showed the following mean loads at fracture: Turkom-Cera (2184 +/- 164 N), In-Ceram (2042 +/- 200 N), and Procera AllCeram (1954 +/- 211 N). ANOVA and Scheffe's post hoc test showed that the mean load at fracture of Turkom-Cera was significantly different from Procera AllCeram (p < 0.05). Scheffe's post hoc test showed no significant difference between the mean load at fracture of Turkom-Cera and In-Ceram or between the mean load at fracture of In-Ceram and Procera AllCeram.
  
  
  CONCLUSIONS
  Because Turkom-Cera demonstrated equal to or higher loads at fracture than currently accepted all-ceramic materials, it would seem to be acceptable for fabrication of anterior and posterior ceramic crowns.
authors.affiliation: Department of Conservative Dentistry, Faculty of Dentistry, University of Malaya, 50603 Kuala Lumpur, Malaysia. makramani@yahoo.com
authors.forename: Bandar M A
authors.initials: BM
authors.lastname: AL-Makramani
authors.forename: Abdul A A
authors.initials: AA
authors.lastname: Razak
authors.forename: Mohamed I
authors.initials: MI
authors.lastname: Abu-Hassan
mesh_terms: D000537:Aluminum Oxide; D000704:Analysis of Variance; D019245:Compressive Strength; D003442:Crowns; D000044:Dental Abutments; D001840:Dental Bonding; D003776:Dental Porcelain / Q000145:classification; D017267:Dental Prosthesis Design; D019232:Dental Restoration Failure; D003799:Dental Stress Analysis / Q000379:methods; D006801:Humans; D018709:Statistics, Nonparametric; D013314:Stress, Mechanical
chemical_list: C105314:AllCeram; D003776:Dental Porcelain; C070870:In-Ceram; D000537:Aluminum Oxide