# E-Flex Gold

> Gold Heat-Treated Economy

- **Manufacturer:** Eighteeth
- **Motion:** Continuous Rotation
- **Alloy:** Control Memory NiTi (gold heat-treated)
- **Key feature:** Gold heat-treated CM wire with integrated orifice opener (17/.08) and glider (19/.02) — variable pitch design with non-cutting safety tip

## Specifications

| File | Tip (mm) | Taper | Length | Cross-section | Motion | Speed (rpm) | Torque | Role |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 17/.08 (Orifice Opener) | 0.17 | 8% | 19mm | Not specified | Continuous Rotation | 300 | 3.0 Ncm | orifice opener |
| 19/.02 (Glider) | 0.19 | 2% | 21mm, 25mm, 31mm | Not specified | Continuous Rotation | 350 | 2.5 Ncm | glide path |
| 15/.04 | 0.15 | 4% | 21mm, 25mm, 31mm | Not specified | Continuous Rotation | 350 | 2.5 Ncm | shaping |
| 20/.04 | 0.20 | 4% | 21mm, 25mm, 31mm | Not specified | Continuous Rotation | 350 | 2.5 Ncm | shaping |
| 25/.04 | 0.25 | 4% | 21mm, 25mm, 31mm | Not specified | Continuous Rotation | 350 | 2.5 Ncm | shaping |
| 30/.04 | 0.30 | 4% | 21mm, 25mm, 31mm | Not specified | Continuous Rotation | 350 | 2.5 Ncm | shaping |
| 35/.04 | 0.35 | 4% | 21mm, 25mm, 31mm | Not specified | Continuous Rotation | 350 | 2.5 Ncm | finishing |
| 25/.06 | 0.25 | 6% | 21mm, 25mm, 31mm | Not specified | Continuous Rotation | 350 | 2.5 Ncm | shaping |
| 30/.06 | 0.30 | 6% | 21mm, 25mm, 31mm | Not specified | Continuous Rotation | 350 | 2.5 Ncm | shaping |

## Protocol

### Glide Path

1. **Orifice Opening and Glide Path** — After establishing straight-line access, use the 17/.08 orifice opener (19mm) at 300 RPM / 3.0 Ncm to flare the coronal third. Then use the 19/.02 glider at 350 RPM / 2.5 Ncm to establish a mechanical glide path to working length (per series brochure). _(300-350 RPM · 2.5-3.0 Ncm)_
   - The 17/.08 orifice opener is 19mm length only — for coronal flaring before glide path (per brochure)
   - The 19/.02 glider creates the mechanical glide path before shaping files
   - Gold heat-treated CM wire allows pre-bending for curved canal access

### Shaping

1. **Sequential Shaping with .04 Taper Files** — Shape sequentially from 15/.04 through 35/.04, taking each file to working length. Use gentle in-and-out movements with light apical pressure. Irrigate and recapitulate between files. All shaping files at 350 RPM and 2.5 Ncm (per series brochure). _(350 RPM · 2.5 Ncm)_
   - Standard .04 taper files (15-35) are the primary shaping sequence (per brochure)
   - .06 taper variants (15-35) are also available for cases requiring greater overall taper (per brochure)
   - Non-cutting safety tip reduces ledge formation and canal transportation (per series brochure)
   - Variable pitch increases gradually from tip to handle to reduce screw-in tendency (per series brochure)

### Finishing

1. **Final Preparation and Irrigation** — Complete the preparation with the appropriate final file size. For wider canals, the Wide Canal variant (20-50/.04) is available. Irrigate thoroughly before obturation.
   - Standard sequence reaches 35/.04 as the largest finishing file
   - Wide Canal variant extends the range to 50/.04 for larger canals (per specs)
   - Verify working length and irrigate before obturation

## Clinical Tips

- Orifice opener (17/.08) operates at 300 RPM / 3.0 Ncm; all other files at 350 RPM / 2.5 Ncm (per Eighteeth series brochure). Note: a distributor spec (Alkaramdent) lists a flat 350 RPM / 2.0 Ncm — series brochure from eighteeth.com is used here as the manufacturer source.
- Gold heat-treated Control Memory NiTi wire provides enhanced flexibility and cyclic fatigue resistance (per brochure).
- The system includes an integrated orifice opener (17/.08, 19mm) and glider (19/.02) — no separate glide path system needed.
- Available in three sub-variants: Standard (variable taper .04 with orifice opener + glider), .06 Taper (sizes 15-35), and Wide Canal (.04 taper, sizes 20-50) (per specs).
- Non-cutting safety tip reduces ledge formation and apical extrusion; variable pitch reduces screw-in tendency (per series brochure).

## Warnings

- No standalone IFU is publicly available for E-Flex Gold; data sourced from Eighteeth series brochure (eighteeth.com, 2022) and distributor spec (Alkaramdent). Settings may differ between documents — verify with current manufacturer literature.
- Orifice opener: 300 RPM / 3.0 Ncm; shaping files: 350 RPM / 2.5 Ncm (per series brochure)
- Contains nickel-titanium — do not use on patients with known nickel allergy
- Inspect instruments before use; discard if visible defects

## Best for

- cost-effective gold heat-treated rotary system
- integrated workflow (orifice opener + glider + shaping in one family)
- uniform 350 RPM / 2.5 Ncm across the shaping sequence (opener: 300 RPM / 3.0 Ncm)

## Technical profile

- **Category:** multi-file-rotary
- **Heat treatment:** Gold Heat-Treated — Gold heat-treated Control Memory NiTi wire — enhanced flexibility and cyclic fatigue resistance with pre-bendable controlled memory behavior.
- **Manufacturing method:** ground
- **Pre-bendable:** yes
- **Reuse:** Single-use
- **Motor:** any-rotary
- **Glide path requirement:** integrated
- **Canal suitability:** Curvature: mild, moderate, severe; Canal size: narrow, normal, wide; Calcified canals: no; Retreatment: no; Conservative access: no
- **Content revision:** 2026-03-22

## FAQ

**What alloy is E-Flex Gold made from?**

E-Flex Gold is manufactured from Control Memory NiTi (gold heat-treated).

**How many files are in the E-Flex Gold sequence?**

The E-Flex Gold system includes 9 files: 17/.08 (Orifice Opener), 19/.02 (Glider), 15/.04, 20/.04, 25/.04, 30/.04, 35/.04, 25/.06, 30/.06.

**What is the E-Flex Gold file sequence?**

E-Flex Gold is used in this order: 19/.02 (Glider) → 17/.08 (Orifice Opener) → 15/.04 → 20/.04 → 25/.04 → 30/.04 → 25/.06 → 30/.06 → 35/.04. Per-file speed, torque and technique are in the protocol section above.

**What motion type does E-Flex Gold use?**

E-Flex Gold uses continuous rotation motion.

**What cases is E-Flex Gold best for?**

E-Flex Gold is best suited for: cost-effective gold heat-treated rotary system, integrated workflow (orifice opener + glider + shaping in one family), uniform 350 RPM / 2.5 Ncm across the shaping sequence (opener: 300 RPM / 3.0 Ncm).

**What speed and torque settings are recommended for E-Flex Gold?**

Recommended settings: 300–350 RPM and 3.0 / 2.5 Ncm across the file sequence (refer to official DFU for full per-file parameters).

## References

- [Manufacturer instructions for use (DFU/IFU)](https://alkaramdent.com/wp-content/uploads/2021/04/E-FLEX-GOLD.pdf)

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_Educational reference for dental professionals. Always confirm settings against the official manufacturer instructions for use before clinical procedures._