Increased Wall-to-Wall Curing Contraction in Thin Bonded Resin Layers

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.

[1]  C. Davidson,et al.  Setting Stress in Composite Resin in Relation to Configuration of the Restoration , 1987, Journal of dental research.

[2]  B. Smith,et al.  In vitro studies of cuspal movement produced by adhesive restorative materials , 1986, British Dental Journal.

[3]  R. Bowen,et al.  Adhesive bonding of various materials to hard tooth tissues: forces developing in composite materials during hardening. , 1983, Journal of the American Dental Association.

[4]  G. Pearson,et al.  Cusp movement in molar teeth using dentine adhesives and composite filling materials. , 1987, Biomaterials.

[5]  C. Davidson,et al.  Relaxation of Polymerization Contraction Stresses by Flow in Dental Composites , 1984, Journal of dental research.

[6]  C. Davidson,et al.  Marginal Sealing of Curing Contraction Gaps in Class V Composite Resin Restorations , 1988, Journal of dental research.

[7]  J. Eick,et al.  Polymerization shrinkage of posterior composite resins and its possible influence on postoperative sensitivity. , 1986, Quintessence international.

[8]  Eick Jd,et al.  Polymerization shrinkage of posterior composite resins and its possible influence on postoperative sensitivity. , 1986 .

[9]  R. Bowen.  Adhesive Bonding of Various Materials to Hard Tooth Tissues. I. Method of Determining Bond Strength , 1965, Journal of dental research.

[10]  C. Davidson,et al.  Curing contraction of composites and glass-ionomer cements. , 1988, The Journal of prosthetic dentistry.

[11]  P. Lambrechts,et al.  Buonocore memorial lecture. Evaluation of clinical performance for posterior composite resins and dentin adhesives. , 1987, Operative dentistry.

[12]  E. Asmussen.  Composite restorative resins: Composition versus wall-to-wall polymerization contraction , 1975 .

[13]  E. K. Hansen,et al.  Wall-to-wall polymerization contraction of composite resins versus filler content. , 1987, Scandinavian journal of dental research.