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Abstract

Shrinkage results from a complex spatial strain network, producing movements within materials. The purpose of this study was to test whether microtensile bond strength (μTBS) of a light-curing resin composite to enamel depends on distance to the center of the curing mass. Labial surfaces of bovine incisors were ground flat, divided into 2 groups (n = 8), acid-etched, and coated with an unfilled resin bond. A resin-based composite was placed in one increment (group A) or separately at gingival, central, and incisal sites (group B), and light-cured. Teeth were sectioned, yielding stick-shaped specimens assigned to one of 9 groups according to distance to incisal edge of restoration (NDistanc). Microtensile bond strength was transformed to percentages of its maximum values within each tooth (PMPa). Comparisons within groups showed (group A) that mean PMPa decreased from central to gingival and from central to incisal (p < 0.01). Comparisons between groups showed that mean PMPa was significantly lower in group A compared with group B, only at gingival and incisal sites. Microtensile bond strength significantly decreased as the distance increased to the center of the curing mass.

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References

Asmussen E, Peutzfeldt A (1999). Direction of shrinkage of light-curing resin composites. Acta Odontol Scand 57:310–315.

Bausch JR, de Lange K, Davidson CL, Peters A, de Gee AJ (1982). Clinical significance of polymerization shrinkage of composite resins. J Prosthet Dent 48:59–67.

Carvalho RM, Santiago SL, Fernandes CA, Suh BI, Pashley DH (2000). Effects of prism orientation on tensile strength of enamel. J Adhes Dent 2:251–257.

Cho BH, Dickens SH, Bae JH, Chang CG, Son HH, Um CM (2002). Effect of interfacial bond quality on the direction of polymerization shrinkage flow in resin composite restorations. Oper Dent 27:297–304.

Davidson CL, de Gee AJ (1984). Relaxation of polymerization contraction stresses by flow in dental composites. J Dent Res 63:146–149.

Davidson CL, de Gee AJ, Feilzer A (1984). The competition between the composite-dentin bond strength and the polymerization contraction stress. J Dent Res 63:1396–1399.

De Gee AJ, Davidson CL, Smith A (1981). A modified dilatometer for continuous recording of volumetric polymerization shrinkage of composite restorative materials. J Dent 9:36–42.

Feilzer AJ, De Gee AJ, Davidson CL (1989). Increased wall-to-wall curing contraction in thin bonded resin layers. J Dent Res 68:48–50.

Feilzer AJ, de Gee AJ, Davidson CL (1990). Relaxation of polymerization contraction shear stress by hygroscopic expansion. J Dent Res 69:36–39.

10.

Ferrari M, Goracci C, Sadek F, Cardoso C (2002). Microtensile bond tests: scanning electron microscopy evaluation of sample integrity before testing. Eur J Oral Sci 110:385–391.

11.

Giannini M, Carvalho RM, Martins LR, Dias CTS, Pashley DH (2001). The influence of tubule density and area of solid dentin on bond strength of two adhesive systems to dentin. J Adhes Dent 3:315–324.

12.

Jorgensen KD, Asmussen E, Shimokobe H (1975). Enamel damages caused by contracting restorative resins. Scand J Dent Res 83:120–122.

13.

Kinomoto Y, Torii M, Takeshige F, Ebisu S (1999). Comparison of polymerization contraction stresses between self- and light-curing composites. J Dent 27:383–389.

14.

Loguercio AD, Reis A, Schroeder M, Balducci I, Versluis A, Ballester RY (2004a). Polymerization shrinkage: effects of boundary conditions and filling technique of resin composite restorations. J Dent 32:459–470.

15.

Loguercio AD, Reis A, Ballester RY (2004b). Polymerization shrinkage: effects of constraint and filling technique in composite restorations. Dent Mater 20:236–243.

16.

Loguercio AD, Uceda-Gomez N, Carrilho MR, Reis A (2005). Influence of specimen size and regional variation on long-term resin-dentin bond strength. Dent Mater 21:224–231.

17.

Pereira PNR, Okuda M, Sano H, Yoshikawa T, Burrow MF, Tagami J (1999). Effect of intrinsic wetness and regional difference on dentin bond strength. Dent Mater 15:46–53.

18.

Reis AF, Giannini M, Kavaguchi A, Soares CJ, Line SR (2004). Comparison of microtensile bond strength to enamel and dentin of human, bovine and porcine teeth. J Adhes Dent 6:117–121.

19.

Sakaguchi RL, Sasik CT, Bunczak MA, Douglas WH (1991). Strain gauge method for measuring polymerization contraction of composite resins. J Dent 19:312–316.

20.

Sakaguchi RL, Wiltbank BD, Murchinson CF (2004). Prediction of composite elastic modulus and polymerization shrinkage by computational micromechanics. Dent Mater 20:397–401.

21.

Sano H, Shono T, Sonoda H, Takatsu T, Ciucchi B, Carvalho R, et al. (1994). Relationship between surface area for adhesion and tensile bond strength—evaluation of a microtensile bond test. Dent Mater 10:236–240.

22.

Shono Y, Ogawa T, Terashita M, Carvalho RM, Pashley EL, Pashley DH (1999). Regional measurement of resin-dentin bonding as an array. J Dent Res 78:699–705.

23.

Versluis A, Tantbirojn D, Douglas WH (1998). Do dental composites always shrink toward the light? J Dent Res 77:1435–1445.

24.

Watts DC, Cash AJ (1991). Determination of polymerization shrinkage kinetics in visible-light-cured materials: methods development. Dent Mater 7:282–287.

25.

Yoshiyama M, Carvalho RM, Sano H, Horner JA, Brewer PD, Pashley DH (1996). Regional bond strengths of resins to human root dentine. J Dent 24:435–442.

26.

Yoshiyama M, Matsuo T, Ebisu S, Pashley D (1998). Regional bond strength of self-etching/self-priming adhesive systems. J Dent 26:609–616.

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Polymerization Shrinkage Influences Microtensile Bond Strength

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