Authors: Peters DD.
Title: Two-year in vitro solubility evaluation of four Gutta-percha sealer obturation techniques.
Journal: J Endod
Date: Apr 1986
Citation: 12(4):139-45
Category: Obturation
Evidence-based Ranking: 5
Purpose/Objectives: To evaluate the solubility of root fillings over time based on the obturation technique used.

Materials & Methods: 60 single-canal teeth were instrumented and then obturated with gutta-percha and Procosol sealer by one of 4 different methods – cold lateral, warm vertical, thermomechanical, and chloroform dip. After setting the teeth were sectioned horizontally and photographed with a microscope. The sections were then placed in sterile water for 2 years changing the water once a month. The sections were then re-photographed and compared. The following criteria were used for evaluation – definite loss of sealer, basically minimal change, through and through loss of sealer, and surface loss of sealer.

Results: The most statistically significant finding was that the lateral condensation technique was more likely to have definite loss of sealer and more likely to have through and through loss of sealer. The chloroform dip and the thermomechanical techniques had the least amount of change over time.

Author’s Conclusion: The lateral technique was the most likely to result in large empty areas over time.

Validity of Conclusion: Statistically significant to p<0.005

Reviewer’s Comments: Would be good study to repeat with modern sealer and techniques.