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Statistical models for evaluating the penetrating ability of endodontic instruments
C Fuchs1, C Friedlander, E Rosenberg
1Department of Statistics, School of Mathematical Sciences, Sackler Faculty of Exact Sciences, Tel Aviv University, Israel.
Journal of Dental Research
|September 1, 1990
Summary
The Canal Finder System (CFS) file demonstrated superior penetration in narrow, curved molar roots compared to traditional K-files and the Pathfinder instrument. This automated device showed increased efficiency in later stages of root canal access.
Area of Science:
- Endodontics
- Dental Materials Science
- Biomedical Engineering
Background:
- Navigating complex root canal anatomy, particularly curved and narrow molar canals, presents a significant challenge in endodontic treatment.
- The effectiveness of endodontic instruments in achieving apical patency is crucial for successful root canal therapy.
- Existing hand instruments have limitations in accessing and negotiating challenging root canal configurations.
Purpose of the Study:
- To compare the in vitro penetrating ability of a No. 08 Canal Finder System (CFS) file against a No. 10 K-file and a "Pathfinder" instrument.
- To evaluate the efficiency of these instruments in achieving apical penetration in extracted curved and narrow molar roots.
- To assess the performance of instruments across sequential stages of root canal negotiation.
Main Methods:
- An in vitro study utilizing 270 extracted curved and narrow molar roots.
- Random allocation of roots into six groups, each representing a permutation of three instruments: No. 08 CFS, No. 10 K-file, and "Pathfinder".
- A three-stage experimental design, with subsequent stages initiated only if apical penetration was not achieved in prior stages.
Main Results:
- In Stage I, the No. 08 CFS (71.1%) and No. 10 K-file (68.8%) showed comparable initial penetration probabilities.
- The No. 08 CFS exhibited superior efficiency in Stage II (20.7% penetration probability) and Stage III (20.7%) compared to the "Pathfinder" (9.8%) and No. 10 K-file (7.4%).
- The automated CFS file demonstrated a significantly higher success rate in achieving apical penetration in challenging root canal anatomy across later stages.
Conclusions:
- The No. 08 Canal Finder System is a highly efficient instrument for negotiating narrow and curved molar root canals, especially when initial attempts are unsuccessful.
- The automated nature of the CFS may offer an advantage over traditional hand files in complex endodontic access.
- This study highlights the potential of the CFS to improve treatment outcomes by enhancing instrument penetration in challenging root canal systems.