motions in biomechanical preparation of root canal
Root canal biomechanical preparation involves cleaning and shaping the root canal system to remove pulp tissue, bacteria, and debris. Different motion types are used during this process to achieve effective cleaning and shaping. Here are the main motion types used in root canal biomechanical preparation: **1. Rotary Motion:** Rotary motion involves using rotary instruments, such as rotary files, to mechanically remove dentin and shape the root canal. These files rotate in a clockwise or counterclockwise direction. Rotary motion is efficient and time-saving, allowing for quick removal of dentin and debris. **2. Reciprocating Motion:** Reciprocating motion involves using reciprocating handpieces or files that move in both clockwise and counterclockwise directions with a specific angle of rotation. This motion is designed to reduce the risk of file separation and preserve the integrity of the instrument. **3. Crown-Down Technique:** The crown-down technique involves starting t