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Root canal retreatment using reciprocating and continuous rotary nickel-titanium instruments.
Patricia Fonseca de Souza1, Leonardo Cantanhede Oliveira Goncalves1, Andre Augusto Franco Marques1
1Department of Endodontics, State University of Amazonas, Manaus, Amazonas, Brazil.
European Journal of Dentistry
|June 4, 2015
Summary
Complete filling material removal during endodontic retreatment is challenging. This study found reciprocating instruments (Reciproc) removed filling material faster than continuous rotary systems, though neither achieved complete removal.
Area of Science:
- Endodontics
- Dental Materials Science
- Biomaterials
Background:
- Complete removal of filling materials during endodontic retreatment is a significant clinical challenge.
- Nickel-titanium instruments offer potential advantages in root canal preparation and retreatment.
Purpose of the Study:
- To evaluate and compare the efficacy of reciprocating (Reciproc) and continuous rotary (ProTaper Universal Retreatment System) nickel-titanium instruments for root canal filling material removal during endodontic retreatment.
Main Methods:
- Forty human premolars were obturated using lateral compaction. Filling material was removed using either the Reciproc system or the ProTaper Universal Retreatment System.
- Teeth were analyzed under an operating microscope to quantify the remaining filling material and time taken for removal.
Main Results:
- No statistically significant difference in the amount of residual filling material was found between the Reciproc and ProTaper Universal Retreatment System groups (P > 0.05).
- The Reciproc system demonstrated a significantly shorter time for filling material removal compared to the ProTaper Universal Retreatment System (P < 0.05).
Conclusions:
- Residual filling material was observed in all teeth, regardless of the retreatment system employed.
- Reciprocating motion, utilized by the Reciproc system, resulted in a faster root canal retreatment procedure.
