We recommend removing accumulated debris from the instrument during preparation by using an interim stand. The instrument is cleaned by simply inserting the instrument into the foam disk. This procedure prevents debris from accumulating in the instrument’s flutes which would increase the friction within the canal.
When starting root canal treatment with rotary nickel-titanium instruments, the canal patency should be determined with a hand instrument, and a glide path should be created. The working length should be determined with an electronic apex locator and the hand instrument before using an Mtwo® instrument. In order to verify the working length, e.g. in curved canals, the measuring result can be rechecked after each Mtwo instrument.
The brushing file movement and the excellent lateral cutting efficiency of Mtwo® ensure removal of obstructions within the coronal third. Thus, with every instrument used, the canal access is gradually enlarged. A separate root canal enlargement is, therefore, not mandatory. However, the canal access can be enlarged with an Mtwo 25/.06, for example.
After carrying out apical gauging and subsequent preparation, a visual inspection can be carried out. Humid or red debris located on the lower instrument third is a signal that further apical preparation is necessary. Dry and white dentine chips however mean that the apical target size is reached.
The root canal can be irrigated at any time during preparation. Thanks to the instruments‘ conicity in combination with Simultaneous Shaping to full working length, irrigation of the root canal can already be carried out after use of the second Mtwo® instrument size 15/.05 to 3 mm short of full working length. We recommend using an ISO size 30 irrigation cannula.