Fracture Rates of IPS Empress All-Ceramic Crowns--A Systematic Review

Heintze, Siegward D.; Rousson, Valentin
March 2010
International Journal of Prosthodontics;2010, Vol. 23 Issue 2, p129
Academic Journal
Purpose: The aim of this study was to evaluate the clinical fracture rate of crowns fabricated with the pressable, leucite-reinforced ceramic IPS Empress, and relate the results to the type of tooth restored. Materials and Methods: The database SCOPUS was searched for clinical studies involving full-coverage crowns made of IPS Empress. To assess the fracture rate of the crowns in relation to the type of restored tooth and study, Poisson regression analysis was used. Results: Seven clinical studies were identified involving 1,487 adhesively luted crowns (mean observation time: 4.5 ± 1.7 years) and 81 crowns cemented with zinc-phosphate cement (mean observation time: 1.6 ± 0.8 years). Fifty-seven of the adhesively luted crowns fractured (3.8%). The majority of fractures (62%) occurred between the third and sixth year after placement. There was no significant influence regarding the test center on fracture rate, but the restored tooth type played a significant role. The hazard rate (per year) for crowns was estimated to be 5 in every 1,000 crowns for incisors, 7 in every 1,000 crowns for premolars, 12 in every 1,000 crowns for canines, and 16 in every 1,000 crowns for molars. One molar crown in the zinc-phosphate group fractured after 1.2 years. Conclusion: Adhesively luted IPS Empress crowns showed a low fracture rate for incisors and premolars and a somewhat higher rate for molars and canines. The sample size of the conventionally luted crowns was too small and the observation period too short to draw meaningful conclusions.


Related Articles

  • Clinical Experience With Empress Crowns. Fradeani, Mauro; Aquilano, Augusto // International Journal of Prosthodontics;May/Jun1997, Vol. 10 Issue 3, p241 

    The IPS Empress pressed glass-ceramic system was used in this investigation to restore anterior and posterior single teeth. One hundred forty-four crowns were evaluated over a period of 6 to 68 months (mean period of 37 months). According to the Kaplan-Meier analysis, the estimated success rate...

  • Long-term esthetic dentistry. McLean, John W. // Quintessence International;Oct1989, Vol. 20 Issue 10, p701 

    The article talks about the implications of long term esthetic dentistry. As reported, esthetic materials have a limitation in their usage due to their physical and mechanical properties. The strength and durability of the metal bond is hard and it is likely that the cast gold restoration remain...

  • Veneer vs. Core Failure in Adhesively Bonded All-ceramic Crown Layers. Lee, J.J.-W.; Kwon, J.-Y.; Bhowmick, S.; Lloyd, I. K.; Rekow, E. D.; Lawn, B. R. // Journal of Dental Research;Apr2008, Vol. 87 Issue 4, p363 

    Joining a brittle veneer to a strong ceramic core with an adhesive offers potential benefits over current fabrication methods for all-ceramic crowns. We tested the hypothesis that such joining can withstand subsurface radial cracking in the veneer, from enhanced flexure in occlusal loading, as...

  • Salvaging crowns and fixed prostheses. Christensen, Gordon J. // Journal of the American Dental Association (JADA);Dec2008, Vol. 139 Issue 12, p1679 

    The article suggests ways on how to repair crowns and fix prostheses. If the fracture piece is small, the best solution is smoothing and polishing the restoration with disks, ceramic polishing wheels and ceramic polish. If the fractured piece is several millimeters, is from a single crown and...

  • Temporary crowns.  // British Dental Journal;12/20/2003, Vol. 195 Issue 12, p719 

    Presents a wide selection of temporary crown materials offered by Henry Schein Inc. Features of the Polycarbonate Temporary Crowns; Types of Stainless Steel Temporary Crowns; Details of the Aluminum Temporary Crowns.

  • SECTION 18: Resin-faced Crowns.  // Fixed Restorative Techniques;1989, p257 

    Section 18 of the book "Fixed Restorative Techniques" is presented. This section focuses on the modifications required to produce resin-faced crowns. It covers work authorization, pattern construction and window development stages. It also suggests several methods of providing the retention of...

  • Evaluation of marginal adaptation and traction resistance of zirconium crowns made up using two different techniques and cemented on pins with three types of cements. Chagas, Priscila C.; Bastos, Luiz Gustavo C.; Lima, Max José P. // Journal of Dental Implants;Jul2014, Vol. 4 Issue 2, p135 

    Objective: The aim was to assess marginal adaptation of zirconium crowns made up by manual milling (pantograph) and computerized (computer assisted designing/computer assisted machining [CAD/CAM]) before and after cementation; and the efficiency of 3 types of cements in retaining these crowns:...

  • Fit of Porcelain Fused-to-metal Crown and Bridge Castings. EDEN, G. T.; FRANKLIN, O. M.; POWELL, J. M.; OHTA, Y.; DICKSON, GEORGE // Journal of Dental Research;Dec1979, Vol. 58 Issue 12, p2360 

    The dimensional accuracy of porcelain fused to metal crown and bridge castings was determined on truncated cone-shaped steel dies. Ni-Cr castings produced in manufacturers' laboratories were consistently undersize, while precious metal castings were consistently oversize. Ni-Cr castings,...

  • A dual-cure composite core for teeth to be restored with full crowns. Strassler, Howard E.; Bare, Lyndsay C. // Australasian Dental Practice;Nov/Dec2009, p154 

    The article discusses the use of adhesive composite resin to restore structurally deficient teeth instead of amalgam cores. Composite core materials allow for rapid setting and eliminate the need for additional retention. The author explains the case of a 24-year-old patient with a maxillary...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics