Wall-to-wall (WTW) polymerization contraction of filled and unfilled chemically and photo-initiated resins was studied in relation to the WTW distance. In an experimental set-up, the resins were bonded to two opposing disks, and the axial (WTW) displacement resulting from the polymerization shrinkage was measured continuously. It was found that the WTW contraction increased with decreasing WTW distance and ultimately reached a value of almost three times the linear polymerization shrinkage.
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References
1.
Asmussen, E. (1975): Composite Restorative Resins. Composition versus Wall-to-Wall Polymerization Contraction, Acta Odontol Scand33:337-344.
2.
Bowen, R.L.; Nemoto, K.; and Rapson, J.E. (1983): Adhesive Bonding of Various Materials to Hard Tooth Tissues: Forces Developing in Composites During Hardening, J Am Dent Assoc106:475-477.
3.
Davidson, C.L. and De Gee, A.J. (1984): Relaxation of Polymerization Contraction Stresses by Flow in Dental Composites, J Dent Res63: 146-148.
4.
Eick, J.D. and Welch, F.H. (1986): Polymerization Shrinkage of Posterior Composite Resins and its Possible Influence on Postoperative Sensitivity, Quintessence Int17:103-111.
5.
Feilzer, A.J.; De Gee, A.J.; and Davidson, C.L. (1987): Setting Stress in Composite Resin in Relation to Configuration of the Restoration, J Dent Res66:1636-1639.
6.
Feilzer, A.J.; De Gee, A.J.; and Davidson, C.L. (1988): Curing Contraction of Composites and Glass-lonomer Cements, J Prosthet Dent59:297-300.
7.
Kemp-Scholte, C.M. and Davidson, C.L. (1988): Marginal Sealing of Curing Contraction Gaps in Class V Composite Resin Restorations, J Dent Res67:841-845.
8.
Lambrechts, P.; Braem, M.; and Vanherle, G. (1987): Evaluation of Clinical Performance for Posterior Composite Resins and Dentin Adhesives, Oper Dent12:53-87.
9.
McCullock, A.J. and Smith, B.G.N. (1986): In vitro Studies of Cuspal Movement Produced by Adhesive Restorative Materials, Br Dent J161:405-409.
10.
Munksgaard, E.C.; Hansen, E.K.; and Kato, H. (1987): Wall-to-Wall Polymerization Contraction of Composite Resins versus Filler Content, Scand J Dent Res95:526-531.
11.
Pearson, G.J. and Hegarty, S.M. (1987): Cusp Movement in Molar Teeth Using Dentine Adhesives and Composite Filling Materials, Biomaterials8:473-476.
12.
Soltesz, U.; Bath, P.; and Klaiber, B. (1986): Dimensional Behaviour of Dental Composites Due to Polymerization Shrinkage and Water Sorption. In: Biological and Biomechanical Performance of Biomaterials, P. Christel, A. Meunier, and A.J.C. Lee, Eds., Amsterdam: Elsevier Science Publishers, pp. 123-128.
