BruxZir Solid Zirconia Crowns and Bridges

SCIENTIFIC VALIDATION

BruxZir Solid Zirconia Crowns and Bridges 18-month Clinical Performance Report Description: Ninety-eight percent of BruxZir Solid Zirconia Crowns and Bridges restorations manufactured by Glidewell Dental Laboratories received a 5 or excellent rating at 18-month recall. All of the single crowns and all of the three- and four-unit bridges had no evidence of fracture or chipping. One of two five-unit bridges failed shortly after cementation and was replaced. Over the 18-month period, BruxZir has proven to be an excellent restoration with respect to esthetics, resistance to fracture/chipping, resistance to marginal discoloration, wear resistance, and retention. BruxZir received a clinical rating of 98%.

BruxZir and Milled IPS e.maxCAD: Very Promising 1-year Clinical Study Results Description: BruxZir (Glidewell Laboratories) and milled e.maxCAD (Ivoclar Vivadent) attracted attention of TRAC Research scientists because they are the first of over 100 posterior tooth-colored restoratives tested here clinically over the past 35 years that showed NO cracks, chips, breaks, wear, or staining after their first year of service.Practice-based controlled clinical tests of tooth-colored restoratives began in this lab in 1976, when the demise of metal in dentistry began to be discussed seriously. The goal was to identify the most promising alternatives. The same test protocol has been used throughout, allowing comparative analyses as restorations age in service. At one year, BruxZir and milled e.maxCAD show superior performance.

Zirconia vs. Porcelain Wear Study Description: Although conventional belief might suggest that zirconia's high fracture strength and surface hardness would cause a greater degree of wear on enamel, a recent study found that the degree of wear on the opposing tooth was actually four times greater in dental porcelain than in polished, unglazed zirconia, suggesting that zirconia restorations are not only more fracture-resistant than porcelain restorations, but also gentler in their functional interaction with natural dentition.

BruxZir® Solid Zirconia vs. Ceramco®3 - A Comparative Wear Study Description: BruxZir Solid Zirconia and Ceramco3 were recently tested in a comparative wear study. Each material was tested using the Willytech Chewing Simulator, which simulated the clinical performance of the material over a period of five years. After 1.2 million wear cycles under a load of 5 kg, BruxZir Solid Zirconia compared favorably to Ceramco3 with barely detectable wear.

BruxZir® Solid Zirconia vs. IPS e.max® Enamel Wear Test Description: Some dentists are concerned about the wear of enamel when opposing BruxZir full-contour zirconia crowns and bridges. In a recent study1 to measure the volumetric loss of enamel, glazed BruxZir Solid Zirconia was found to wear compatible with enamel and virtually identical to glazed IPS e.max. 1. Wear of Enamel on Polished and Glazed Zirconia: Shah S, Michelson C, Beck P, Ramp LC, Cakir D, Burgess J. 2010; Washington, DC: AADR. Abstract #129615.

Light Transmission vs. Wavelength Graph Description: BruxZir Zirconia exhibits higher translucency in the warm color spectral wavelength (>550 nanometers) allowing for more natural looking restorations.

Scanning Electron Microscope Images Description: SEM of sintered, colloidally processed BruxZir Solid Zirconia vs. sintered, isostatically pressed zirconia.

High Flexural Strength Description: Lithium disilicate ceramics deliver 400 MPa of flexural strength and typical zirconia materials have a flexural strength of more than 1200 MPa. However, because of post-powder processing, BruxZir Solid Zirconia dental restorations are able to exceed that strength threshold, with flexural strengths up to 1465 MPa.

Antagonist Wear Study Description: The antagonistic (Steatite balls) wear shows BruxZir® Solid Zirconia only with 72±21 micron, which is significantly lower than Ceramco®3, with 110±48 micron. The University of Tübingen study was run using an eight chamber Willytec Chewing Simulator at 1.2 million cycles.

High-Strength Crown Options Description: View a side-by-side comparison of high-strength crown options, and conduct your own analysis on how BruxZir restorations compare visually to traditional PFM and full-cast restorations. While some patients may favor the esthetics of precious or non-precious metals, BruxZir crowns & brides present a more lifelike tooth shade, making the final restoration nearly indistinguishable from natural dentition.

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