A comprehensive overview of the tools, techniques, and materials used in root canal therapy, specifically focusing on cleaning and shaping the canal system. The text details the standardization of endodontic instruments, defining measurements like D1 and D16, and discusses the shift from fixed-increment sizes to proposals like Schilder's Profile 29, which uses a fixed percentage increase. A significant portion of the material covers instrumentation techniques, contrasting traditional methods like serial filing with modern approaches such as the step-back and crown-down methods, including the use of highly flexible Nickel-Titanium (NiTi) rotary instruments like ProTaper and ProFile. Furthermore, the source emphasizes the crucial role of irrigating solutions—particularly sodium hypochlorite (NaClO) for tissue dissolution—and chelating agents like EDTA for smear layer removal, stressing that shaping facilitates cleaning. Finally, the text explores obturation (filling) techniques using gutta-percha, comparing methods like lateral condensation with warm compaction techniques such as the Schilder method, System B, and Thermafil, while also introducing newer materials like RealSeal.
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