{"type":"rich","version":"1.0","provider_name":"Transistor","provider_url":"https://transistor.fm","author_name":"Protrusive Dental Podcast","title":"Rotary vs Reciprocating Files – The Endo Showdown with Samuel Johnson Part 1 – PDP270","html":"","width":"100%","height":180,"duration":2641,"description":"Rotary or reciprocating files — which should you actually be using?\nIs one safer than the other? Does reciprocation really reduce file separation? Are you choosing your system because it suits the canal anatomy, or because it is simply the one you were taught?\nEndodontic file systems can feel like a maze of brands, tapers, alloys, motions and marketing claims. But beneath all that noise, the real question is much more practical: what is your file doing inside the canal, and what compromise are you accepting?\nIn this episode, Dr Samuel Johnson returns to unpack the Endo Showdown: rotary versus reciprocating files. We cover file motion, glide paths, shaping philosophy, NiTi metallurgy, cyclic fatigue, torsional fatigue, and why no system is perfect.\n https://youtu.be/HfWDBbNgjsA \nWatch PDP270 on YouTube\nProtrusive Dental Pearl\nA palliative root canal can be useful for an unrestorable tooth if disinfecting the canal allows infection to heal and natural bone to recover before extraction and future implant planning.\n⚠️ Do not dismiss root canal treatment purely because the tooth is not a long-term functional restoration.\n✅ Where appropriate, consider whether endodontic disinfection could improve the future implant site by allowing natural bone healing.\nKey Takeaways\nThe purpose of shaping is not simply to scrape canal walls; it is to create space for irrigant flow.\nIrrigation is the most important part of root canal disinfection.\nRotary files move in a continuous 360-degree rotation.\nReciprocating files cut in one direction and reverse before excessive stress builds up.\nModern reciprocation is designed to cut, release and gradually progress apically.\nFile choice is not just about motion; metallurgy, taper, design and operator experience all matter.\nNiTi hand files with strong shape memory may be problematic in curved canals because they want to straighten.\nMartensitic heat-treated files are more flexible and can better follow canal curvature.\nUnwinding flutes are a...","thumbnail_url":"https://img.transistorcdn.com/hLSIeRiYSp0oTfIk0BzEukFutShD18hH3f6fq4QHsWw/rs:fill:0:0:1/w:400/h:400/q:60/mb:500000/aHR0cHM6Ly9pbWct/dXBsb2FkLXByb2R1/Y3Rpb24udHJhbnNp/c3Rvci5mbS9lZmM0/ZTNjYzdiZDJhNGFj/MzBiYmU2NTUwNmM2/NzQ2My5wbmc.webp","thumbnail_width":300,"thumbnail_height":300}