Papadogianis, Y., Boyer, D. B. and Lakes, R. S., "Creep of conventional and microfilled dental composites", J. Biomed. Materials Research, 18 15-24 (1984). abstract
Papadogianis, Y., Boyer, D. B. and Lakes, R. S., "Creep of posterior dental composites", J. Biomed. Materials Research, 19 85-95 (1985).
The creep of microspecimens of posterior dental composites was studied using a torsional creep apparatus. Shear stresses were maintained for 3 h and recovery was followed for 50 h. Creep curves were obtained at 21, 37, and 50 degrees C and four torque levels. The effect of conditioning the specimens in water up to 8 weeks was studied. The posterior composites exhibited linear viscoelastic behavior at low deformations. They had higher shear moduli and greater resistance to creep than conventional and microfilled composites. In aging experiments, maximum shear moduli occurred when specimens were 48 h to 1 week old. Subsequent softening was attributed to water absorption. Residual strain was highest when the composites were stressed within 24 h of initiating polymerization. Residual strain was very low in specimens 48 h to 8 weeks of age.
Park, H. C., Liu, Y. K. and Lakes, R. S., "The material properties of bone-particle impregnated PMMA", J. Biomechanical Engineering, 108 141-148 (1986). abstract
Papadogianis, Y., Boyer, D. B. and Lakes, R. S., "Creep of amalgam at low stress", J. Dental Research, 66, 1569-1575 (1987). abstract
Lee, J. H., Park, J. B., Andreasen, G. F., and Lakes, R. S., "Thermomechanical studies of Ni-Ti alloys", J. Biomed. Materials Research, 22, 573-588 (1988).
Papadogiannis, Y., Helvatjoglou-Antoniadi, M., Lakes, R. S., and Sapountjis, M., "The creep behavior of glass-ionomer restorative materials", Dental Materials, 7, 40-43 (1991). abstract
Suliman, A. A., Boyer, D. B., and Lakes, R. S., "Cusp movement in premolars resulting from composite polymerization shrinkage", Dental Materials, 9, 6-10 (1993). abstract
Suliman, A. A., Boyer, D. B., and Lakes, R. S., "Interferometric measurements of cusp deformation of teeth restored with composites", J. Dental Research, 72, 1532-1536, (1993). abstractPapadogiannis Y, Lakes RS, Petrou-Americanos A, Theothoridou-Pahini S, "Temperature dependence of the dynamic viscoelastic behavior of chemical- and light-cured composites", Dent Mater. 9(2): 118-22, Mar. (1993) abstract
Suliman, A. A., Boyer, D. B., and Lakes, R. S., "Polymerization shrinkage of composite resins: comparison with tooth deformation", J. Prosthetic Dentistry, 71, 7-12, (1994). abstract
Boyer, D. B., Papadogiannis, Y., Park, H. C., and Lakes, R. S., "Viscoelasticity and aging of dental composites", Bio-Medical Materials and Engineering, 8(1), 45-53, (1998). abstractPapadogiannis, Y., Boyer, D. B., Helvatjoglou-Antoniades M., Lakes, R. S., and Kapetanios, C.., "Dynamic viscoelastic behavior of resin cements measured by torsion resonance", Dental Materials, 19, (6), 510-516, Sept. (2003). (Get pdf)