Artículos de revistas
Thermal Variations In The Pulp Chamber Associated With Composite Insertion Techniques And Light-curing Methods
Registro en:
Journal Of Contemporary Dental Practice. , v. 10, n. 1, p. 17 - 24, 2009.
15263711
2-s2.0-58649106674
Autor
Guiraldo R.D.
Consani S.
Sinhoreti M.A.C.
Correr-Sobrinho L.
Schneider L.F.J.
Institución
Resumen
Aim: The aim of this study was to investigate the effect of different incremental insertion techniques, photoactivation, and restorative phases on thermal variations occurring during the polymerization of Filtek Z250 composite resin. Methods and Materials: The experiment was conducted using 90 bovine incisor teeth. The teeth were randomly assigned to three groups according to the technique used for photoactivation with a halogen light (continuous, soft-start, or intermittent). The groups were further separated into three subgroups according to method of increment placement (bulk, oblique, or horizontal/vertical) for a total of nine groups (n=10). Restorations were placed in a controlled environment (37°C and 50±10% RU) and the temperature recorded using a digital thermometer coupled to a Type-K thermocouple inserted in the pulp chamber through the root canal in contact with the dentin. Data were analyzed using an analysis of variance (ANOVA) and the Tukey's test. Results: Higher temperature values were found for continuous light photoactivation in combination with the placement of horizontal/vertical composite increments and photoactivation of the adhesive using a continuous light exposure. Conclusion: The light source is the most important factor producing temperature changes during photoactivation of resin composite. Clinical Significance: Temperature increases in the pulp chamber due to light curing should be considered to avoid harming the delicate pulp tissue when large restorations or inlays/onlays require several consecutive light curing exposures for a complete cure. 10 1 17 24 Bowen, R.L., Properties of silica-reinforced polymer for dental restorations (1963) J Am Dent Assoc, 66 (1), pp. 57-64 Feilzer, A.J., Dooren, L.H., De Gre, A.J., Davison, C.L., Influence of light intensity on polymerization shrinkage and integrity of restoration-cavity interface (1995) Eur J Oral Sci, 103 (5), pp. 322-326 Unterbrink, G.L., Muessner, R., Influence of light on two restorative systems (1995) J Dent, 23 (3), pp. 183-189 Watts DC, Al-Hindi A. Soft-star photo-polymerization effects in resin-composite restoratives. J Dent Res. 1998 77:658(Abstr. 216)Obici, A.C., Sinhoreti, M.A., Goes, M.F., Consani, S., Correr Sobrinho, L., Effect of the Photo-activation method on polymerization shrinkage of restorative composites (2002) Oper Dent, 27 (2), pp. 192-197 Eakle, W.S., Ito, R.K., Effect of insertion technique on microleakage in mesio-occlusodistal composite resin restorations (1990) Quintessence Int, 21 (5), pp. 369-374 Hilton, T.J., Schwartz, R.S., Ferracane, J.L., Microleakage of four Class II resin composite insertion techniques at intraoral temperature (1997) Quintessence Int, 28 (2), pp. 135-144 Neiva, I.F., Andrada, M.A., Baratieri, L.N., Monteiro Junior, S., Ritter, A.V., An in vitro study of effect of restorative technique on marginal leakage in posterior composites (1998) Oper Dent, 23 (6), pp. 282-289 Zach, L., Cohen, G., Pulp response to externally applied heat (1965) Oral Surg Oral Med Oral Pathol, 19, pp. 515-530 McCabe, J.F., Wilson, H.J., The use of differential scanning calorimetry for the evaluation of dental materials (1980) J Oral Rehabil, 7 (3), pp. 103-110 Lloyd, C.H., Joshi, A., McGlynn, E., Temperature rises produced by light sources and composites during curing (1986) Dent Mater, 2 (4), pp. 170-174 Masutani, S., Setcos, J.C., Schinell, R.J., Philips, R.W., Temperature rise during polymerization of visible light-activated composite resins (1988) Dent Mater, 4 (4), pp. 174-178 McCabe, J.F., Cure performance of light-activated composites by differential thermal analysis (DTA) (1985) Dent Mater, 1 (6), pp. 231-234 Consani, S., Ruhnke, L.A., Temperature developed during the cutting of tooth tissue (1976) Bull Tokyo Dent Col, 17 (2), pp. 101-105 Hansen, E.K., Asmussen, E., Correlation between depth of cure and temperature rise of a light-activated resin (1993) Scand J Dent Res, 101 (3), pp. 176-179 Knezevic, A., Tarle, Z., Meniga, A., Sutalo, J., Pichler, G., Ristic, M., Degree of conversion and temperature rise during polymerization of composite resin samples with blue diodes (2001) J Oral Rehabil, 28 (6), pp. 586-591 Rueggeberg, F.A., Caughman, W.F., Curtis Jr, J.W., Effect of light intensity and exposure duration on cure of resin composite (1994) Oper Dent, 19 (1), pp. 26-32 Loney, R.W., Price, R.B.T., Temperature transmission of High-output light-curing units through dentin (2001) Oper Dent, 26 (5), pp. 516-520