“Ghassan Yared was working in war-torn Lebanon when he was inspired to develop the Reciproc instruments”
softer route, removing GP as it does so. Sometimes the end of the GP can be softened with a little heat to allow the instrument to get started but once started the GP comes out in lumps. Using a slight rotating
action on the handpiece you can often encourage whole GP points to come out. A brushing action can also be used which allows selective removal of dentine and the ability to sweep out chunks of old GP. All this can be done using
the R25 instrument, (Figures 2 and 3) the same that is used for preparation in ‘normal’ canals, ie no special re-treat- ment files are required. Once the GP is removed it is good to enlarge the canal further to remove infected dentine and create a flared, tapered shape which allows deep penetra- tion of disinfectant irrigant. For this the R40 and R50 instruments are ideal. Although these may seem
large sizes, the difference from the R25 is not that great because the taper is greater over the first 3mm of the smaller tipped instru- ment than the larger ones. It is enough to allow some preparation of the canal walls throughout the length of the canal. Working with an operating
microscope allows us to see the complexities of the root canal system and it is some- times surprising that we can clean such convoluted spaces at all. Clearly, the greater the volume of irrigant we can get into these areas the better the chance of success. Reciproc
will prepare a good shape to allow you whatever irrigation regime you prefer. The Reciproc system
apparently causes very little extrusion of cut material beyond the apex and it does seem to draw debris back up out of the canal (Figures 4 and 5). This action is useful for removing carrier based obtura- tion systems such as Thermafil and 3D GP. I’ve also used it to tease out a large silver point that had already been loos- ened with ultrasonic energy although this is something that needs a certain amount of caution! I have seen footage of a fibre-post being removed using a Reciproc instrument but I haven’t attempted this yet myself. Ghassan Yared was working
in war-torn Lebanon when he was inspired to develop the Reciproc instruments. One of his requirements, because of the war, was that his treat- ment needed to be carried out as quickly as possible – hence the single instrument. The whole system simplifies treat- ment and reduces the number of instruments but still allows high quality, predictable work to be carried out. Although the individual
Reciproc instruments are more expensive than those in other systems the overall cost is less because often only one will do the work of three or more in other systems. The only additional expenditure (albeit significant) is on a motor but for someone looking to invest for the first time or update a worn motor I would heartily recommend this system.
Scottish Dental magazine 73
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