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interview | Fig. 1a Fig. 1b Fig. 1c Fig. 2a Fig. 2b Fig. 2c “With a minimal investment for EDDY, dentists can achieve higher quality and efficiency in root canal therapy.” Since I have been using EDDY, I assert that there has been a significant improvement concerning the obtura- tion of lateral canals. There has been a difference espe- cially in the results in the front region. In cases of open apices or wide apical foramina, it is still advisable to work very carefully. Would you recommend EDDY to colleagues? Of course, I would. The system is eminently user- friendly. Therefore, it is comfortable and reliable to use, even without a microscope. With a minimal investment for EDDY, dentists can achieve higher quality and effi- ciency in root canal therapy. Actually, I use it to apply the cement too. Can you describe any clinical cases to demonstrate the advantages of EDDY? I remember a special case: a 17-year-old male patient came to my dental office suffering from severe pain of tooth #16 (Figs. 1a–c). The last treatment had taken place one year before, conducted by another dentist. The patient complained of constant pain, pain on per- cussion and swelling. Looking at the radiograph, an in- fection of the mesiobuccal and distobuccal canals was clearly visible. When I opened the tooth and removed a part of the gutta-percha, I noticed a fourth canal, but I was not able to access it, so I started to clean and shape the other three canals. I rinsed and used EDDY to remove as much of the old gutta-percha as possible. After cleaning with EDDY, it was much easier to gain access to the fourth canal. It seemed that the sonic cleaning had opened the canal. In the final radiograph the lateral canal in the palatal root is precisely visible. I have another interesting example of the success- ful application of EDDY: a patient with poor oral hy- giene came to the practice with severe pain of tooth #15 (Figs. 2a–c). A radiograph visualised a large old compos- ite restoration. When I opened the tooth, I detected two root canals. They were very long and narrow (25 mm), so I used EDDY to ensure that the sodium hypochlorite reached the tips of the roots. The final radiograph shows the result: a clean apical delta. Thank you very much for the interview. Images courtesy of Dr Katrien Carnotensis. Originally published in Tandartsenwereld/Le Monde Dentaire November 2017. roots 1 2018 33