Composition and physical properties of gutta-percha endodontic filling materials

By Friedman CE, Sandrik JL, Heuer MA, Rapp GW. ​

Date: 03/1977
Journal: JOE

Summary:  ​

Purpose: To determine whether a correlation exists between the composition and the mechanical properties​

of five commercially available gutta-percha endodontic filling materials.​


  • The following gutta-percha endodontic filling materials were studied:  Dent-O-Lux, Indian Head, Mynol, Premier,w and Tempryte​
  • AAE specified size no. 100 gutta-percha cones were used​
  • Three samples of gutta-percha cones from each company were quantitatively assayed for organic and​ inorganic fractions.​
  • Correlations between proportions of these ingredients and the mechanical properties were made.​

​Most highlighted Results:​

  • The mean organic percentage of all five brands was 23.1% with SD of only -+0.5%, while the mean inorganic percentage was 76.4% with SD of -+0.7%.​
  • Dent-O-lux to be the most brittle of the five brands, because of its low-percentage elongation and ultimate tensile​ strength. (Table)
  • ​gutta-percha content was positively correlated with yield strength and the ultimate tensile strength.​​​

Clinical significance:​

High levels of gutta-percha were shown to produce stronger, more rigid filling materials, while high levels of zinc oxide tended to increase brittleness and thereby decrease flow. This might help dentists in selecting the brand of Gutta percha.