Scientific Studies

BruxZir® Scientific Studies

The comprehensive reports that follow evaluate the integrity and performance of BruxZir® Zirconia. Biomaterials research, university studies and clinician reports were completed in order to examine how well a variety of materials embody the characteristics vital to high-quality dental restorations. Performance assessments, including long-term data, show that BruxZir restorations are excellent alternatives to PFMs and cast gold restorations. Furthermore, tests that evaluate strength, wear and translucency affirm the advantages of BruxZir Zirconia compared to other all-ceramic restorations.

Outstanding Clinical Performance in 10-Year Independent Study

Gordon J. Christensen Clinicians Report®

For patients seeking treatment that’s both affordable and lasting, the Gordon J. Christensen Clinicians Report recommends that clinicians choose Class 5 zirconia, such as BruxZir® Zirconia, wherever possible. In this 10-year clinical study, BruxZir Zirconia demonstrated excellent durability, exhibited zero terminal fractures, and provided the margin of safety needed to survive common clinical abuses.

An independent, nonprofit, dental education and product testing foundation, Clinicians Report®, September, 2020. 

BruxZir Zirconia Crowns and Bridges 5-year Clinical Performance Report

The Dental Advisor

Conclusions: Over the five-year evaluation period, BruxZir Zirconia Crowns and Bridges has proven to be an excellent restoration with respect to esthetics and dependability. It is highly recommended for posterior crowns and three- and four-unit bridges as well as implant-supported crowns and bridges. In select cases, it can be used confidently for anterior restorations. It received a 97% clinical rating.

Esthetics
92%
Resistance to fracture or chipping
96%
Resistance to marginal discoloration
99%
Wear Resistance
91%
Retention
90%

Translucency of CAD/CAM Ceramics

The Dental Advisor

Specimens of the zirconia products were more translucent at 0.5 mm thickness than at 1.0 mm thickness. At the 0.5 mm thickness, the translucency parameter ranged from 10.3 to 10.7, and BruxZir was significantly more translucent than the other three products. At the 1.0 mm thickness, the translucency parameter ranged from 7.1 to 7.8, and BruxZir was significantly more translucent than Zenostar® Zr and Lava Plus. Translucency parameter was a function of wavelength when measured between 360–750 nm in reflection.

Zirconia vs. Porcelain Wear Study

J Adv Prosthodont 2010;2:111-5

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 vs. Ceramco® 3 — A Comparative Wear Study

University Hospital Tübingen

BruxZir Zirconia and Ceramco 3 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 compared favorably to Ceramco 3 with barely detectable wear.

BruxZir vs. IPS e.max® Enamel Wear Test

S.Shah, C.Michelson, P.Beck, L.C.Ramp, D.Cakir and J.Burgess

Some dentists are concerned about the wear of enamel when opposing BruxZir Zirconia. In a recent study to measure the volumetric loss of enamel, glazed BruxZir was found to cause less enamel wear than glazed IPS e.max®.

Natural Enamel
0.29 ± 0.12 mm3
Glazed BruxZir
0.37 ± 0.23 mm3
Glazed IPS e.Max
0.41 ± 0.15 mm3

The Translucency of BruxZir Zirconia

BruxZir materials exhibit higher light transmission resulting in a more natural shade value. The BruxZir Full-Strength zirconia powder composition results in restorations with improved optical transmission, homogeneity of color, heightened strength and a more precise fit in multi-unit restorations. The translucency of BruxZir Esthetic zirconia is superior to that of other zirconias. Exhibiting high translucency in the warm color wavelengths, BruxZir Esthetic zirconia results in more lifelike restorations for patients.

BruxZir Unshaded Zirconia Translucency Chart
BruxZir Esthetic True to Nature Translucency Chart

Scanning Electron Microscope Images

SEM of sintered colloidally processed BruxZir Full-Strength vs. sintered isostatically pressed zirconia. The 50 percent smaller average grain size and colloidal processing of BruxZir Full-Strength zirconia improves its physical properties and esthetics.

High Flexural Strength

Lithium Disilicate ceramics have 500 MPa and typical zirconia materials have a flexural strength of more than 1,150 MPa. However, because of post-powder processing, BruxZir Zirconia dental restorations are able to exceed that strength threshold, with flexural strengths up to 1,465 MPa.

BruxZir High Flexural Strength Chart