Artículos de revistas
Influence Of Chemical And Mechanical Polishing On Water Sorption And Solubility Of Denture Base Acrylic Resins
Registro en:
Brazilian Dental Journal. , v. 15, n. 3, p. 225 - 230, 2004.
1036440
2-s2.0-18244363071
Autor
Rahal J.S.
Mesquita M.F.
Henriques G.E.P.
Nobilo M.A.A.
Institución
Resumen
Influence of polishing methods on water sorption and solubility of denture base acrylic resins was studied. Eighty samples were divided into groups: Clássico (CL), and QC 20 (QC) - hot water bath cured; Acron MC (AC), and Onda Cryl (ON) - microwave cured; and submitted to mechanical polishing (MP) - pumice slurry, chalk powder, soft brush and felt cone in a bench vise; or chemical polishing (CP) - heated monomer fluid in a chemical polisher. The first desiccation process was followed by storage in distilled water at 37 ± 1°C for 1 h, 1 day, 1, 2, 3 and 4 weeks. Concluding each period, water sorption was measured. After the fourth week, a second desiccation process was done to calculate solubility. Data were submitted to analysis of variance, followed by Tukey test (p≤0.05). Means of water sorption (%) and solubility (%), respectively, were: CL-MP: 1.92 and 0.02; CL-CP: 1.98 and 0.52; QC-MP: 2.31 and -0.05; QC-CP: 2.32 and 0.25; AC-MP: 2.45 and -0.07; AC-CP: 2.43 and 0.41; ON-MP: 2.32 and -0.06; ON-CP: 2.34 and 0.27. Mechanical polishing promoted significantly lower solubility of acrylic resins; initially, water sorption values were higher for chemically polished samples, however, after 4 weeks all groups were similar. 15 3 225 230 Spencer, H.R., Gariaeff, P., The present status of vulcanite versus plastics as a baseplate material (1949) Contact Point, 27-28, pp. 263-267 Nishii, M., Studies on the curing of denture base resins with microwave irradiation: With particular reference to heat-curing resins (1968) J Osaka Dent Univ, 2, pp. 23-40 Gotusso, M.J., Tratamiento químico e superficial de las resinas acrílicas (1969) Rev Asoc Odontol Argent, 57, pp. 359-361 Aslan, Y., Avci, M., Monopoly coating on acrylic resin surfaces: A bacteriologic study (1990) J Prosthet Dent, 63, pp. 478-481 Nagem Filho, H., Chiodi-Neto, J., Araujo, P.A., Biocompatibility of acrylic resins implants in connective tissue (1973) Estomatol Cult, 7, pp. 120-123 Arima, T., Murata, H., Hamada, T., The effects of cross-linking agents on the water sorption and solubility characteristics of denture base resin (1996) J Oral Rehabil, 23, pp. 476-480 Barsby, M.J.A., Denture base resin with low water absorption (1992) J Dent, 20, pp. 240-244 Cucci, A.L.M., Vergani, C.E., Giampaolo, E.T., Afonso, M.C.S.F., Water sorption, solubility and bond strength of two autopolymerizing acrylic resins and one heat-polymerizing acrylic resin (1998) J Prosthet Dent, 80, pp. 434-438 Wong, D.M.S., Cheng, L.Y.Y., Chow, T.W., Clark, R.K.F., Effect of processing method on the dimensional accuracy and water sorption of acrylic resin dentures (1999) J Prosthet Dent, 81, pp. 300-304 Miettinen, V.M., Vallittu, P.K., Water sorption and solubility of glass fiber-reinforced denture polymethyl methacrylate resin (1996) J Prosthet Dent, 77, pp. 531-534 Revised American Dental Association Specification N. 12 for denture base polymers (1975) J Am Dent Assoc, 90, pp. 451-458 Monsénégo, P., Baszkin, A., Costa, M.L., Lejoyeux, J., Complete denture retention. Part II: Wettability studies on various acrylic resin denture base materials (1989) J Prosthet Dent, 62, pp. 308-312 Kilani, B.H.Z., Retief, D.H., Guldag, M.V., Castleberry, D.J., Fischer, T.E., Wettability of selected denture base materials (1984) J Prosthet Dent, 52, pp. 288-291 Monsénégo, P., (1987) L'interface Muco-prothéique en Prothèse Adjoinant Caractérisation Microscopique, Physicochimique et Microbiologique des Poymères Acryliques, , [Thesis] Paris: University of Paris Anusavice, K.J., (1998) Phillips: Materials Dentários. 10th Ed., , Rio de Janeiro: Guanabara Koogan Takahashi, Y., Chai, J., Kawaguchi, M., Effect of water sorption on the resistance to plastic deformation of a denture base material relined with four different denture reline materials (1998) Int J Prosthodont, 11, pp. 49-54 Szabó, G., Valderhaug, J., Ruyter, E., Some properties of a denture acrylic coating (1985) Acta Odontol Scand, 43, pp. 249-256 Sheridan, P.J., Koka, S., Ewoldsen, N.O., Lefebvre, C.A., Lavin, M.T., Cytotoxicity of denture base resins (1997) Int J Prosthodont, 10, pp. 73-77 Truong, V.T., Thomasz, F.G.V., Comparison of denture acrylic resins cured by boiling water and microwave energy (1988) Aust Dent J, 33, pp. 201-204 Harrison, A., Huggett, R., Jagger, R.C., The effect of a cross-linking agent on the abrasion resistance and impact strength of an acrylic resin denture base material (1978) J Dent, 6, pp. 299-304