Official Kids-e sources confirm 17 mm length, 4% constant taper, triangular cross-section, non-cutting tip, and rainbow heat-treatment language. The official public pages accessed on March 25, 2026 did not state K1-K4 sizes or RPM/torque, so those details remain lower-confidence than the core product identity.
File List
Protocol
1. Canal Assessment
Evaluate primary tooth root canal anatomy and root resorption status with radiograph. Determine working length.
2. Glide Path
Create glide path with #10-15 K-file to working length. Confirm canal patency.
3. Shaping
K1 (#20) -> K2 (#25) -> K3 (#30) sequence. K4 (#40) for wider canals if needed. Approx. 300-400 RPM, 1.0-2.0 Ncm torque. Advance in short pecking motions (2-3mm).
4. Irrigation
Irrigate with NaOCl after each file change. Final irrigation: NaOCl + 17% EDTA.
5. Obturation
Dry canal and obturate with appropriate material (Metapex, ZOE-based, or MTA).
Clinical Tips
- •Use approx. 300-400 RPM, 1.0-2.0 Ncm torque (exact values not specified in manufacturer DFU)
- •Advance in short pecking motions (2-3mm), do not force beyond the apex
- •Irrigate with NaOCl after each file change
- •Enhanced cyclic fatigue resistance via Rainbow Surface Technology
- •ISO color coding: K1=Yellow (#20), K2=Red (#25), K3=Blue (#30), K4=Black (#40)
Warnings
- ⚠Do not advance beyond the apex due to physiologic root resorption
- ⚠Monitor torque limits (approx. 1.0-2.0 Ncm)
- ⚠Single-use instrument — do not reuse
- ⚠Check file integrity before use
- ⚠Primary tooth dentin walls are thin — do not apply excessive pressure
Clinical Notes
- →CM-Wire NiTi alloy (Rainbow surface treatment is a separate technology, not the alloy type)
- →Rainbow Surface Technology — enhanced cyclic fatigue resistance through 3-stage heat treatment
- →Triangular cross-section — efficient cutting and debris removal
- →Variable pitch design — reduces fracture risk
- →Non-cutting safety tip — prevents perforation risk
- →Kids-e-Dental LLP (Mumbai, India) — parent company: Laxmi Dental Limited
- →RPM/torque values are not confirmed in manufacturer DFU; values are general clinical ranges for CM-Wire NiTi pediatric files
References
- Kids-e-Dental product page (kidsedental.com/kids-e-files/) — manufacturer specs: triangular cross-section, 4% taper, 17mm, non-cutting safety tip
- Kids-e-Dental All Products Catalogue, April 2025 — manufacturer product catalogue
- Jayashree V et al. JCHR. 2025;15(5):3057-3065 — comprehensive pediatric rotary file review (Kids-e-Files specs)