- Last Updated on Saturday, 19 November 2011 15:07
- Hits: 564
To treat a root canal, its exact length must be determined. Thus it can be assured that all parts of the root canal system can be cleaned mechanically and chemically.
There are three methods to achieve this.
Here, the narrowest point at the root tip is probed with a root canal instrument. This method relies solely on the experience and the feeling of the dentist and thus is very inaccurate. It is considered obsolete and is no longer applied.
2. X - Ray Measurement
With this technique a root canal instrument is inserted into the tooth to determine the root length. Then a X-Ray is made, on which the instrument is visible in the root canal and the length can be calculated. This is the standard method for the determination of the root canal length, although it is also prone to error.
3. Electronic Length Measurement
In endodontics this method has been firmly established in recent years. The initial devices were inaccurate and the results often incorrect, but today the endometry is an indispensable tool for root canal treatment. The measurement is performed by using an impedance measurement at two or more frequencies.
The most accurate results are obtained from the combination of X-ray and endometry.
A radiographic comparison of the root canal instrumentation technologies
Backman, C., R.Oswald, D.Pitts
.J. of Endodontics, 1992, 18, 19.
A clinical evaluation of some methods of determining tooth length
Bramante, C., A. Berbert
Oral Surgery 37, 1974, 463 – 473.
Reliability of radiographic interpretation
Gelfand, M., Etal
J. of Endodontics, 9, 1989, 9, 71 -75.
Electronic apex locators
Gordon M., N. Chandler
Int. End. J., 37, 2004, 425 – 437.
In vivo determination of root canal: a preliminary report using the Tri Auto ZX apex-locating hand piece
Grimberg F., G. Banegas, L. Chiacchio et al.
Int.End. J., 35, 2002, 590-3.
In Vivo Determination of the Frequency Response of the Tooth Root Canal Impedance versus Distance from the Apical Foramen
Rambo, M., Gamba, H., Ratzke, A., Schneider, F., Maia, J., Ramos, C.
Engineering in Medicine and Biology Science. 29th International Conference of the IEEE 2007; 570-573