Effects of Manual Instrumentation on Premolar Root Canals
Author Information
Author(s): Li Ke-Zeng, Gao Yuan, Zhang Ru, Hu Tao, Guo Bin
Primary Institution: State Key Laboratory of Oral Diseases, West China College of Stomatology, Sichuan University
Hypothesis
Does the inclusion of variations in the internal anatomy of premolars affect the outcomes of a single instrumentation technique?
Conclusion
Different morphological changes were observed in the five types of root canal systems shaped with the same hand instrumentation technique.
Supporting Evidence
- Canal volumes and surface areas increased after instrumentation.
- Prepared canals were straightened, but some ledges formed in certain canal types.
- A wide range of unchanged canal surfaces was recorded.
Takeaway
This study looked at how different shapes of tooth canals change when using the same tools to clean them. It found that each tooth shape needs special care.
Methodology
Thirty single-root premolars were scanned with micro-CT before and after preparation with hand ProTaper instruments, measuring various canal characteristics.
Limitations
The study was limited by the small sample size and the observational nature of the report.
Participant Demographics
Extracted human teeth from a Chinese population sample.
Digital Object Identifier (DOI)
Want to read the original?
Access the complete publication on the publisher's website