The effect of placement technique upon the compressive strength and porosity of a composite resin

R. G. Chadwick, J. F. McCabe, A. W.G. Walls, R. Storer

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18 Citations (Scopus)

Abstract

This paper examines the effect of two placement techniques upon the compressive strength and level of porosity of specimens of a composite resin. Those specimens prepared by a condensation technique had a significantly lower mean compressive strength (P < 0·05) and value of Weibull modulus (P < 0·05) than specimens prepared using a smearing technique. No significant differences in the overall mean percentage area occupied by porosity and mean number of pores were demonstrated (P > 0·05) between the two placement techniques. Specimens prepared using the smearing technique, however, had significantly smaller mean maximum pore diameters (P < 0·05) than those prepared using the condensation technique. It is therefore desirable when placing composite resins to reduce to a minimum handling procedures that are likely to influence the levels of porosity within the material.

Original languageEnglish
Pages (from-to)230-233
Number of pages4
JournalJournal of Dentistry
Volume17
Issue number5
DOIs
Publication statusPublished - Oct 1989

Keywords

  • Composite resins
  • Properties
  • Technique

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