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Operative Dentistry | 2013

Wear Rates of Resin Composites

Wayne W. Barkmeier; Robert L. Erickson; Latta Ma; Terry M. Wilwerding

SUMMARY A laboratory study was conducted to examine the wear of resin composite materials using a generalized wear simulation model. Ten specimens each of five resin composites (Esthet•X [EX], Filtek Supreme Plus [SP], Filtek Z250 [Z2], Tetric EvoCeram [EC], and Z100 Restorative [Z1]) were subjected to wear challenges of 100,000, 400,000, 800,000, and 1,200,000 cycles. The materials were placed in cylinder-shaped stainless-steel fixtures, and wear was generated using a flat stainless-steel antagonist in a slurry of polymethylmethacrylate beads. Wear (mean facet depth [μm] and volume loss [mm(3)]) was determined using a noncontact profilometer (Proscan 2000) with Proscan and ProForm software. Statistical analysis of the laboratory data using analysis of variance and Tukeys post hoc test showed a significant difference (p<0.05) for mean wear facet depth and volume loss for both the number of cycles and resin composite material. Linear regression analysis was used to develop predictive wear rates and volume loss rates. Linear wear was demonstrated with correlation coefficients (R(2)) ranging from 0.914 to 0.995. Mean wear values (mean facet depth [μm]) and standard deviations (SD) for 1200K cycles were as follows: Z1 13.9 (2.0), Z2 26.7 (2.7), SP 30.1 (4.1), EC 31.8 (2.3), and EX 67.5 (8.2). Volume loss (mm(3)) and SDs for 1200K cycles were as follows: Z1 0.248 (0.036), Z2 0.477 (0.044), SP 0.541 (0.072), EC 0.584 (0.037), and EX 1.162 (0.139). The wear rate (μm) and volume loss rate (mm(3)) per 100,000 cycles for the five resin composites were as follows: wear rate Z1 0.58, EC 1.27, Z2 1.49, SP 1.62, and EX 4.35, and volume loss rate Z1 0.009, EC 0.024, Z2 0.028, SP 0.029, and EX 0.075. The generalized wear model appears to be an excellent method for measuring relative wear of resin composite materials.


American Journal of Dentistry | 1995

4-year clinical study of castable ceramic crowns.

Kelsey Wp rd; Cavel T; Richard J. Blankenau; Wayne W. Barkmeier; Terry M. Wilwerding; Latta Ma


General dentistry | 2000

Comparison of composite resin-to-porcelain bond strength with three adhesives.

Kelsey Wp rd; Latta Ma; Stanislav Cm; Shaddy Rs


Journal of Applied Polymer Science | 2010

Physical Characterization of a Self-Healing Dental Restorative Material

Brittany E. Wertzberger; Joshua T. Steere; Ryan M. Pfeifer; Melissa A. Nensel; Latta Ma; Stephen M. Gross


Operative Dentistry | 1999

Bond strength of composite to enamel and dentin using Prime & Bond 2.1.

Wayne W. Barkmeier; Hammesfahr Pd; Latta Ma


Archive | 2007

Self-healing dental composites and related methods

Stephen M. Gross; Latta Ma


Archive | 2013

Buffered microencapsulated compositions and methods

Latta Ma; Stephen M. Gross; William A. Mchale


American Journal of Dentistry | 2005

Microtensile bond strength of total-etch and self-etch adhesives to the enamel walls of Class V cavities

Kelsey Wp rd; Latta Ma; Vargas Ma; Carroll Lr; Armstrong


American Journal of Dentistry | 2004

An accelerated in vitro model for adhesive testing.

William P. Kelsey; Latta Ma; O'Meara Jd; Wayne W. Barkmeier; Hammesfahr Pd; Jefferies


The Journal of clinical dentistry | 1989

Comparison of two light cured reline systems.

Latta Ma; Tateosian Lh

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Cavel T

Creighton University

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