Filling the canals
There are various ways to fill the prepared and cleansed canals. All methods have in common that some small steps are required leading to a result as predictable as possible.
Method 1, System B  in combination with Obtura II (a warm filling technique)
A gutta-percha point with a size similar to the main file (the thickest file yet reaching a certain required length), is fit in the canal in order to check if the point completely comes to length. Then, a plugger of System B is selected which gets locked at about 5 mm from the apex (binding point). Now cementum (AH26, AHplus & Topseal) is put into the canal. This can e.g. be done with a finger plugger, hand plugger , file or a paper point. Now, the selected gutta-percha point is brought into the canal up to the right length (exactly the number of millimetres of the main file’s length). It is advisable that the gutta-percha point owns some friction when it is tugged back somewhat with a pair of tweezers. Now, in a smooth movement the plugger of System B (at a temperature of 200 – 220 degrees) is put into the canal until about one mm from the point where it got locked (binding point). This will last for about two seconds. Now the plugger (without heating) is helt on its place with a light pressure to apical during about 8 seconds. Then, the temperature of the plugger is reduced to 200 degrees and pressed a little bit farther into the canal (until the binding point). After that, the plugger is removed from the canal in a smooth, somewhat turning movement. The plugger should at least have a high temperature for 2 seconds, otherwise there is a risk that also the apical gutta-percha is pulled out. Now the still mouldable gutta-percha is condensed vertically until it has cooled off a little bit. Now Obtura II’s needle of the Gutta-percha pistol is put into the canal up to the present condensed gutta-percha. The surface of the gutta-percha is getting mouldable now because Obtura II’s needle is about 100 degrees at the style. Under dosed pressure, gutta-percha is now sprayed in the canal with help of the pistol. The pressure of the spray presses – as it were – the needle out of the canal. As the apical gutta-percha had become mouldable, now the gutta-percha from the pistol now perfectly flows together with it. Once the canal has been filled, the gutta-percha with hand pluggers is postcondensed, until it has been cooled off. For a four canal element the complete above described filling method takes less than 5 minutes.
Method 2, Carrier born gutta-percha (Thermafil).
There are two ways to put in cementum before an Obturator is being placed. Because the canal entrance is closed directly, pressure towards apical arises.
- Cementum is applied around the canal entrance. When placing the Obturator, to the apical sufficient cementum is pressed forward in behalf of the gutta-percha.
- (Little) cementum is put at the canal wall with the aid of of paper point, a file or a hand plugger. After that, the Obtirator is placed.
The procedure is as follows:
- the canal’s length should match with the length at gutta-percha at the Obturator (too much gutta-percha will coronally be taken from the Obturator. In this way you prevent that the pulpa room is filled completely with gutta-percha)
- the rubber stopper on the Obtirator is fixed at the main file’s length
- the gutta-percha at the tip of the Obturator is cut down (ca 1 mm) until the plastic carrier
- the Obturator is warmed up in a little oven
- in approximately 4 seconds the Obturator is put in the canal
- now the Obturator is kept under light pressure during about 10 seconds to compensate shrinkage
- the excess until the canal entrance is removed with a Thema-cut drill or a heat carrier
From this page you can order in our web shop
- Gutta-percha style
- Hand plugger
- Obtura II
- Obturator (Thermafil)
- Paper-Points
- System B
- Heatcarrier (Buchanan plugger)
- Thermafill oven
- Therma-cut drill
- Files
to last chapter:
Closing an open apex
to next chapter:
Possible bleaching of the element
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