- Last Updated on Saturday, 17 December 2011 21:38
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Various international and national studies show that the success rate of first endodontic treatment (primary treatment for teeth whose roots were never treated) can exceed 90%. This means, a complete cure can be achieved in at least 90 out of 100 treatments.
In case an existing root filling has to be removed and replaced due to a recurring inflammation, the success rate is about 80%.
This rate is documented by scientific studies under optimal conditions, in which treatment was performed by dentists with specialized training in endodontics or students with professional guidance.
Further studies revealed that root canal treatments performed by dentists without specialized training had higher failure rates.
The success rate in root canal treatment depends on many different factors. In Germany it is about 40-50%, in cross-sectional studies for treatment periods from 1977 to 1993.
Increasingly, - in complex cases - root canal treatment is referred to experienced colleagues, spezialized in endodontics.
Incomplete root canal treatment. The unfilled space is contaminated with bacteria. An inflammation is visible on the root tip as a dark shadow (arrow).
Incomplete root filling and root post. An inflammation is visible as a dark shadow at the root tip (arrow). Notice the unfilled space between post and root canal filling.
Complete root filling. In the middle of the root you can see a filled side canal (arrow). The root filling reaches the apex.
Complete root filling. The anterior root canals are filled completely, despite the strong curvature. ---------------------------------------
Factors that influence the success of root canal treatment positively
- All root canals were found.
- The entire root canal system could be cleaned and disinfected.
- All root canals were filled up to the root tip.
- Hidden side canals were cleaned and filled.
- The entrances to the canals were closed tightly.
- The tooth was treated with a tight seal filling or a crown.
Factors that influence the success of root canal treatment negatively
- Broken root canal instruments that can not be removed.
- Fully calcified root canals.
- Under - or over-filling of root filling material.
- Not treated, additional root canals.
- Root perforations.
- Strong root curvatures.