Abstract

Machining of brittle materials has traditionally been slow, expensive, and prone to creating surface damage, decreasing strength and service lifetime. The objective of this project is to (1) enhance the machinability of dental ceramics in terms of both increasing the rate of material removal and decreasing the damage incurred during machining and further to (2) via chemical tempering, increase clinical success by increasing strength and fatigue life while decreasing wear. Two novel machining concepts will be explored to create these enhancements; machining in a chemically active high-temperature bath and machining with in-situ chemical tempering.
Four specific aims will be investigated: (1) investigate high-temperature machining to increase the efficiency of machining, (2) tailor chemical reactions during machining in a high- temperature salt bath to promote high material removal rates with low surface damage, (3) determine the effect of selected chemical tempering methods on surface integrity, fatigue strength, and wear in conjunction with Projects 1, 2, and 3, and (4) incorporate chemical tempering and high-temperature machining into a single process.

  Funding Agency

Agency
National Institute of Health (NIH)
Institute
National Institute of Dental & Craniofacial Research (NIDCR)
Type
Research Program Projects (P01)
Project #
1P01DE010976-01A1
Application #
3732675
Study Section
Project Start
Project End
Budget Start
Budget End
Support Year
1
Fiscal Year
1995
Total Cost
Indirect Cost

  Institution

Name
University of Medicine & Dentistry of NJ
Department
Type
DUNS #
605799469
City
Newark
State
NJ
Country
United States
Zip Code
07107

  Publications

Yin, Ling (2012) Property-process relations in simulated clinical abrasive adjusting of dental ceramics. J Mech Behav Biomed Mater 16:55-65
Silva, N R F A; Bonfante, E A; Rafferty, B T et al. (2011) Modified Y-TZP core design improves all-ceramic crown reliability. J Dent Res 90:104-8
Rafferty, Brian T; Janal, Malvin N; Zavanelli, Ricardo A et al. (2010) Design features of a three-dimensional molar crown and related maximum principal stress. A finite element model study. Dent Mater 26:156-63
Bonfante, Estevam A; Sailer, Irena; Silva, Nelson R F A et al. (2010) Failure modes of Y-TZP crowns at different cusp inclines. J Dent 38:707-12
Guess, P C; Zhang, Y; Kim, J-W et al. (2010) Damage and reliability of Y-TZP after cementation surface treatment. J Dent Res 89:592-6
Coelho, Paulo G; Silva, Nelson R; Thompson, Van P et al. (2009) Effect of proximal wall height on all-ceramic crown core stress distribution: a finite element analysis study. Int J Prosthodont 22:78-86
Zhang, Yu; Kim, Jae-Won; Bhowmick, Sanjit et al. (2009) Competition of fracture mechanisms in monolithic dental ceramics: flat model systems. J Biomed Mater Res B Appl Biomater 88:402-11
Guess, Petra C; Zhang, Yu; Thompson, Van P (2009) Effect of veneering techniques on damage and reliability of Y-TZP trilayers. Eur J Esthet Dent 4:262-76
Santana, Tomasa; Zhang, Yu; Guess, Petra et al. (2009) Off-axis sliding contact reliability and failure modes of veneered alumina and zirconia. Dent Mater 25:892-8
Coelho, P G; Bonfante, E A; Silva, N R F et al. (2009) Laboratory simulation of Y-TZP all-ceramic crown clinical failures. J Dent Res 88:382-6

Showing the most recent 10 out of 54 publications