The primary long-term goal of this project is to improve a wide range of dental clinical procedures through the use of glass fiber-reinforced thermoplastic composites (FRC). The FRC will be used as wires, bars, clasps, and frameworks in applications such as retainers, splints, space maintainers, orthodontic archwires and prosthodontic devices. FRC possess a unique combination of properties for dental applications, including good mechanical properties, esthetics and the potential for chair-side formability and bonding to tooth structure. In fulfilling this goal the structure-property relationships of these systems will be examined carefully. FRC formulations with the desired characteristics for each application will be developed by studying the effects of thermoplastic matrices (PETG,PC, PU, PCTG, Nylon 6), fiber loadings (30-70%) and coupling agents. Samples will be prepared in the laboratory with an automated solvent-cast/filament- winding technique. Evaluations will be conducted microscopically (optical, SEM, image analysis); mechanically (flexure, tensile, torsion, stress relaxation); and physically (water sorption, hydrolytic stability, formability). Samples of some formulations will be produced by pultrusion and compared to the analogous laboratory specimens to determine if the filament-winding technique is a useful, predictive model system. The effects of specimen geometry on measured properties will also be studied. The effects of various organosilane surface treatments on fiber/matrix interfacial behavior will be characterized for different thermoplastic resins and types of fibers, under dry and wet conditions. The technique of mechanically testing a single fiber embedded in a matrix will be used. Surfaces will be evaluated with transmission and diffuse reflectance FTIR.

Agency
National Institute of Health (NIH)
Institute
National Institute of Dental & Craniofacial Research (NIDCR)
Type
Research Project (R01)
Project #
5R01DE009126-03
Application #
3222947
Study Section
Oral Biology and Medicine Subcommittee 1 (OBM)
Project Start
1990-07-01
Project End
1993-06-30
Budget Start
1992-07-01
Budget End
1993-06-30
Support Year
3
Fiscal Year
1992
Total Cost
Indirect Cost
Name
University of Connecticut
Department
Type
Schools of Dentistry
DUNS #
City
Farmington
State
CT
Country
United States
Zip Code
06030
Ardeshna, Anil P (2011) Clinical evaluation of fiber-reinforced-plastic bonded orthodontic retainers. Am J Orthod Dentofacial Orthop 139:761-7
Freilich, Martin A; Duncan, Jacqueline P; Alarcon, E Karina et al. (2002) The design and fabrication of fiber-reinforced implant prostheses. J Prosthet Dent 88:449-54
Freilich, M A; Duncan, J P; Meiers, J C et al. (1998) Preimpregnated, fiber-reinforced prostheses. Part I. Basic rationale and complete-coverage and intracoronal fixed partial denture designs. Quintessence Int 29:689-96
Freilich, M A; Karmaker, A C; Burstone, C J et al. (1998) Development and clinical applications of a light-polymerized fiber-reinforced composite. J Prosthet Dent 80:311-8
Karmaker, A C; DiBenedetto, A T; Goldberg, A J (1997) Continuous fiber reinforced composite materials as alternatives for metal alloys used for dental appliances. J Biomater Appl 11:318-28
Freilich, M A; Goldberg, A J (1997) The use of a pre-impregnated, fiber-reinforced composite in the fabrication of a periodontal splint: a preliminary report. Pract Periodontics Aesthet Dent 9:873-4, 876
Altieri, J V; Burstone, C J; Goldberg, A J et al. (1994) Longitudinal clinical evaluation of fiber-reinforced composite fixed partial dentures: a pilot study. J Prosthet Dent 71:16-22
Goldberg, A J; Burstone, C J; Hadjinikolaou, I et al. (1994) Screening of matrices and fibers for reinforced thermoplastics intended for dental applications. J Biomed Mater Res 28:167-73
Goldberg, A J; Burstone, C J (1992) The use of continuous fiber reinforcement in dentistry. Dent Mater 8:197-202