Authors: Wong M, Peters DD, Lorton L, Bernier WE.
Title: Comparison of gutta-percha filling techniques: three chloroform--gutta-percha filling techniques, part 2.
Journal: J Endod
Date: Jan 1982
Citation: 8(1):4-9
Category: Obturation
Evidence-based Ranking: 5
Purpose/ Objectives: To compare the replication abilities, volumetric changes, and time requirements of three chlorform gutta-percha filling techniques: Chloroform-dip, chlorpercha, and Kloroperka.

Material and Methods: A gold mold which could be separated into two vertical halves was fabricated to duplicate an actual root canal system. A total of 64 fillings, 16 with chloropercha, 16 using Kloroperka, 16 using chloroform-dip, and 16 using the lateral condensation technique. Volumetric changes, time, and replication properties of the fillings were evaluated in the same manner described in part 1.

Results: Chloropercha showed the most volume change with an average shrinkage of 12.42% +/- 2.7%, Kloroperka 4.86% +/- 1.55%, and Chloroform-dip showed the least amount of shrinkage 1.40% +/- 0.57%. Lateral condensation showed an expansion of 1.13% +/- 0.60%. The time required for fillings: lateral condensation 5.62 +/- 1.11 minutes, chloropercha 3.71 +/- 0.55 minutes, Kloroperka 4.05 +/- 0.37 minutes, and chloroform-dip 3.69 +/- 0.36 minutes. As for the replication abilities, the chloroform techniques proved to be significantly superior to the lateral condensation technique.

Author’s Conclusion: The chloroform-dip fillings had excellent replication qualities and low shrinkage characteristics. If a chloroform technique is to be used, the chloroform-dip technique should be considered.

Reviewer’s Comments: An interesting study that proves chloroform technique has better replication abilities than lateral condensation. However, I wonder why the vertical condensation wasn’t used as control like in Part 1.