Instrument with same length and color:
- a. 10 purple.
- b. 30 blue.
- c. 20 yellow.
- d. 25 red ***
Because file length in endo 21, 25, 28, 31mm
The answer is d. 25 red.
Here's the breakdown:
- Standard endodontic file lengths:
As you correctly stated, common file lengths in endodontics are 21, 25, 28, and 31mm.
- Color-coding for length:
Endodontic files are often color-coded at the handle to quickly identify their length, with specific colors corresponding to different lengths.
- Matching length and color:
Among the options given, only option d (25 red) matches both the length (25mm) and a commonly used color code for that length (red).
Endodontic File Lengths:
Here's a common color-coding system for endodontic file lengths:
- 21mm: Yellow.
- 25mm: Red.
- 28mm: White.
- 31mm: Blue.
Key points:
- Color-coding varies among manufacturers, so always check the specific system used by your instruments.
- Other factors like file type (e.g., K-files, H-files) and taper may also have distinct color codes.
- It's essential to accurately identify file length and other characteristics for precise and safe endodontic procedures.
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