(patent No. 226063 since March 2015)
Simple design resistant to user errors and mechanical damage. In comparison to the alpha version from 2010, fragile movable parts that could be quickly worn or damaged have been eliminated.
Currently (January 2019) it is manufactured in 2 sizes (outer diameter of the tube) 1.0mm and 0.8mm. The diameter of 0.7mm is subjected to clinical tests, whereas the diameter of 0.6mm undergoes laboratory tests. The wall thickness of the tube is 0.1mm, and the depth of the embossment is 0.2mm. This means that with the use of a 1.00mm tip it is possible to grip broken instruments with a maximum diameter of approx. 0.3mm (2×0.1mm of the wall + 2×0.2mm of the circular embossment + a minimum of 0.1mm of free space for the blocking wedge), whereas with the 0.8mm tip – instruments with a maximum diameter of 0.1mm.
Just behind the circular embossment there are two opposite microwindows with a diameter of 1mm / 0.4mm. They allow to insert the tube onto the broken instrument at an acute angle (and not only 180°), while still observing it under the microscope! It is a unique feature of the ERS system!
The microwindows also serve as the additional mechanical retention in the event when a part of the broken instrument passes outside the tube. This is an absolutely unique feature of the ERS system providing extremely high grip strength of the broken instrument! In the case of removing long and thin instruments (convergence angle of 2o and less), e.g. Lentulo needle, which are wedged and stuck partly outside the root canal in the alveolar bone or in the maxillary sinus, the use of ERS system is particularly recommended due to the risk of further breaking of the removed fragment when trying to use ultrasound systems.
The angle of convergence of the movable wedge is chosen in a way to effectively block inside the tube both the thinnest instruments with a low angle of convergence, and modern rotary or reciprocal files with a high angle of convergence (even up to 8o).
Inside the tip there is a strong spring, which guarantees smooth and extremely simple operation of the system thanks to the function of automatic reversing of the movable blocking wedge in the case of releasing the pressure on the trigger („blow back system”). Long travel of the trigger combined with a strong spring tension ensures the doctor a high comfort of work, because it is possible to choose the strength of the grip of the broken instrument very precisely by the degree of pulling out the blocking wedge. The system of automatic return of the wedge to the starting position (hidden inside the tube outside the microwindows) after releasing the pressure on the trigger – „blow back system” – allows quick and effective work in the root canal in case of not gripping the broken instrument. There is no need to perform ANY additional steps to repeat the attempt to grip the broken instrument in the root canal – just release the pressure on the trigger!