# ProTaper Gold®

> Gold Heat-Treated Progressive Taper

- **Manufacturer:** Dentsply Sirona
- **Motion:** Continuous Rotation
- **Alloy:** Gold Heat-Treated NiTi
- **Key feature:** Variable taper design with progressive engagement

## Specifications

| File | Tip (mm) | Taper | Length | Cross-section | Motion | Speed (rpm) | Torque | Role |
| --- | --- | --- | --- | --- | --- | --- | --- | --- |
| SX | 0.19 | 3.5-19% | 19mm | Convex triangular | Continuous Rotation | 300 | 5-6 Ncm | — |
| S1 | 0.18 | 2-11% | 21mm, 25mm, 31mm | Convex triangular | Continuous Rotation | 300 | 5-6 Ncm | — |
| S2 | 0.20 | 4-11.5% | 21mm, 25mm, 31mm | Convex triangular | Continuous Rotation | 300 | 1.5-2 Ncm | — |
| F1 | 0.20 | 7% | 21mm, 25mm, 31mm | Convex triangular | Continuous Rotation | 300 | 1.5-2 Ncm | — |
| F2 | 0.25 | 8% | 21mm, 25mm, 31mm | Convex triangular | Continuous Rotation | 300 | 3-4 Ncm | — |
| F3 | 0.30 | 9% | 21mm, 25mm, 31mm | Concave triangular | Continuous Rotation | 300 | 3-4 Ncm | — |
| F4 | 0.40 | 6% | 21mm, 25mm, 31mm | Concave triangular | Continuous Rotation | 300 | 3-4 Ncm | — |
| F5 | 0.50 | 5% | 21mm, 25mm, 31mm | Concave triangular | Continuous Rotation | 300 | 3-4 Ncm | — |

## Protocol

### Glide Path

1. **Establish Glide Path** — In the presence of a viscous chelator (such as Glyde File Prep or ProLube root canal conditioner) passively scout the coronal 2/3 with #10 and #15 hand files. Gently work these instruments until a smooth, reproducible glide path to at least ISO 015 is confirmed.
   - Pre-curve file for curved canals
   - Use watch-winding motion
   - Glide path must be confirmed before rotary use
   - ⚠ Minimum ISO 015 glide path required
   - ⚠ Never force file apically
2. **Mechanized Glide Path (Optional)** — Alternatively, mechanized glide path files (such as ProGlider or PathFile) may be used after a #10 hand file to create reproducible glide path to working length. _(File: ProGlider / PathFile · 300 RPM · 2.0 Ncm)_
   - Use only after #10 hand file reaches canal
   - Light apical pressure only
   - Recapitulate with #10 K-file after

### Shaping

1. **Initial Shaping - S1** — Float S1 in canal with NaOCl, passively follow glide path. Use brushing action on outstroke to improve straight-line access. Continue until depth of #15 hand file is reached. _(File: S1 · 300 RPM · 5-6 Ncm · Brushing on withdrawal stroke)_
   - Always brush away from furcation
   - Let file do the work - minimal apical pressure
   - Clean flutes frequently
   - ⚠ Do not force to WL if resistance felt
2. **Progressive Shaping - S2** — Use S2 exactly as S1, with brushing action, until depth of #15 hand file is reached. _(File: S2 · 300 RPM · 1.5-2 Ncm · Brushing on withdrawal stroke)_
   - Irrigate between files
   - Scout apical 1/3 with #10 and #15 hand files
   - Establish working length and confirm patency
3. **Shape to Working Length** — Use S1 with brushing action to WL, then S2 with brushing action to WL. Reconfirm WL, irrigate, recapitulate. _(File: S1 then S2 · 300 RPM · 5-6 / 1.5-2 Ncm · Brushing action to WL)_
   - Especially important in curved canals
   - Irrigate, recapitulate, re-irrigate after each file
4. **Coronal Shaping - SX (If Needed)** — Use SX with brushing motion to move coronal aspect away from furcal concavities. Also for shorter roots. _(File: SX · 300 RPM · 5-6 Ncm · Brushing stroke away from furcation)_
   - Use to relocate canal orifice
   - Optimal for canals in shorter roots
   - Can be used at any point in sequence

### Finishing

1. **Apical Finishing - F1** — Use F1 in non-brushing action, each insertion deeper than previous, until WL reached. Gauge foramen with #20 hand file. _(File: F1 · 300 RPM · 1.5-2 Ncm · Non-brushing, progressive insertion)_
   - If #20 is snug at WL, canal is ready for obturation
   - If #20 is loose at WL, proceed to F2
   - ⚠ Do not leave file at WL longer than 1 second
2. **Apical Finishing - F2** — Use F2 with same non-brushing motion to WL. Gauge with #25 hand file. _(File: F2 · 300 RPM · 3-4 Ncm · Non-brushing to WL)_
   - Standard finishing size for most canals
   - Verify tug-back with master cone
   - ⚠ Do not leave file at WL longer than 1 second
3. **Apical Finishing - F3, F4, F5 (If Needed)** — Continue with F3/F4/F5 if previous file loose at WL. Gauge with #30, #40, or #50 hand files respectively. _(File: F3 / F4 / F5 · 300 RPM · 3-4 Ncm · Non-brushing to WL)_
   - Same technique for F3, F4, and F5
   - Gauge with corresponding hand file after each
   - ⚠ Do not leave file at WL longer than 1 second
   - ⚠ Only use if previous file is loose at WL

## Clinical Tips

- Speed: 300 RPM constant rotation per the current IFU (2024/2026 revisions); the legacy 2017 DFU permitted a 250-350 RPM range
- Current EU/ROW IFU (2024-11 and 2026-02) specifies torque RANGES: 5-6 Ncm (S1, SX), 1.5-2 Ncm (S2, F1), 3-4 Ncm (F2-F5). The North America IFU (2021) keeps flat values of 520/150/312 g·cm (≈5.1/1.5/3.1 Ncm)
- Manufacturer reports ~2.4x average cyclic fatigue resistance vs ProTaper Universal (2.6x for the F3 file specifically; internal lab data) — independent bench studies confirm the direction (Hieawy 2015, PMID 25841955; Uygun 2016, PMID 26011308; Elnaghy & Elsaka 2016, PMID 26426295)
- Manufacturer reports ~24% increased flexibility vs ProTaper Universal (internal lab data) — independent bench studies confirm greater flexibility, attributed to two-stage (A→R→M) transformation and high Af (Hieawy 2015; Elnaghy & Elsaka 2016)
- Bench trade-off: torsional resistance and microhardness are lower than ProTaper Universal (Elnaghy & Elsaka 2016) — respect torque limits and avoid taking an oversized file to length (per US IFU precautions)
- Micro-CT: less canal transportation and more preserved dentin thickness than ProTaper Universal in curved canals (Gagliardi 2015, PMID 26321062); vs ProTaper Ultimate and Reciproc Blue, shaping was comparable in moderately curved canals (2026 micro-CT, PMID 41934543)
- RCT evidence vs successor ProTaper Ultimate is mixed: one trial found less postoperative pain and greater bacterial reduction with ProTaper Gold in necrotic premolars (PMID 41882642); another found equivalent postoperative pain in mandibular molars (PMID 41211526)
- A ≥2-year RCT reported higher healing success with conventional ProTaper Gold treatment than with a minimally invasive TruNatomy protocol (88.7-91.9% vs 71.4-77.8%; PMID 40603366), while a 2026 meta-analysis found no postoperative-pain difference vs TruNatomy (low-certainty evidence, PMID 42030017)
- Balancing evidence: one RCT reported higher postoperative pain vs XP-endo Shaper and 2Shape (PMID 36748451), and a 2026 bench meta-analysis found EdgeTaper Platinum's cyclic fatigue resistance higher in most comparisons (high heterogeneity, PMID 42261515)
- Shorter 11mm handle allows improved accessibility to posterior teeth (vs 13mm ProTaper Universal handle)
- Same exact geometries as ProTaper Universal with advanced gold heat-treatment metallurgy
- Convex triangular cross-section and progressive taper enhance cutting action while decreasing rotational friction
- Non-cutting tip design with small flat area enhances ability to navigate through soft tissue and debris
- Use Shaping files (S1, S2, SX) with brushing action on withdrawal stroke — always brush away from the furcation
- Use Finishing files (F1-F5) with non-brushing action — follow canal passively to WL and withdraw immediately (≤1 second at length)
- Verify the final shape by inspecting the finishing file's apical flutes for dentinal debris (per manufacturer technique card)
- In severe curvatures the current IFU permits using the files manually; for abrupt apical curvature, pre-curved hand files are directed for the apical region instead of rotary
- For extremely curved canals the current IFU recommends dedicating a new file to a single canal, preferring small/flexible files, and considering small-angle motions (watch-winding, balanced force) to limit rotational bending fatigue
- Files may appear slightly curved out of the pack — a result of the proprietary process, not a defect; straightening before use is unnecessary
- Sequence is the same regardless of canal length, diameter, or curvature
- Always use minimal apical pressure — never force files; torque-control motors are recommended
- Delivered sterile in radiation-sterilized blisters per current IFU (2017-era non-sterile stock required sterilization before first use)
- System-matched obturation ecosystem: Conform Fit gutta-percha (variable-taper master cones), matching paper points, obturators (F1-F5) and size verifiers are available (manufacturer)

## Warnings

- Do not use rotary in canals with abrupt apical curvature — heightened separation risk; current EUR IFU (2026) directs pre-curved hand files in the apical region instead (US IFU retains this as a formal contraindication)
- Contains nickel — do not use on patients with known nickel allergy (US IFU warning; current EUR IFU formally lists no known contraindications)
- Do not fully immerse in sodium hypochlorite — only the working part may contact NaOCl, at no more than 5% concentration (current IFU)
- Reusability is region-dependent: US IFU (2021) = sterile, single-patient use, reprocessing not applicable; current EU/ROW IFU (2024/2026) = multiple-use with reprocessing per Dentsply's General Processing Instructions; the superseded 2017 ROW DFU recommended max 5 uses and max 2 canals (>30° or S-shaped), 4 (10-30°), 8 (<10°)
- For extremely curved canals the current IFU recommends single-canal use of a new file
- Inspect before each use for deformation (bent or unwound flutes), breakage, corrosion, damaged cutting edges, or loss of color coding — discard if any are present
- The current IFU excludes re-use of silicone stops and asks for them to be removed and discarded after each use
- Use rubber dam isolation; safety and effectiveness not established in pregnancy, breastfeeding, or children (EUR IFU 2026)

## Contraindications

- abrupt/severe apical curvature for rotary use (US IFU contraindication; EUR IFU 2026 reclassifies it as a warning — use pre-curved hand files apically)

## Best for

- versatile multi-file sequence
- complex anatomy
- graduated shaping

## Technical profile

- **Category:** multi-file-rotary
- **Heat treatment:** Gold Heat-Treated — Proprietary gold heat treatment producing two-stage (austenite→R-phase→martensite) transformation with high Af — manufacturer reports ~2.4x average cyclic fatigue resistance (2.6x for F3) and ~24% flexibility gain vs ProTaper Universal (internal lab data); independent bench studies confirm the direction (Hieawy 2015; Elnaghy & Elsaka 2016)
- **Manufacturing method:** ground
- **Pre-bendable:** yes
- **Reuse:** Reusable (limited)
- **Motor:** any-rotary
- **Glide path requirement:** mechanical-recommended — #10-#15 hand files with a viscous chelator (Glyde File Prep / ProLube), then ProGlider or PathFile
- **Canal suitability:** Curvature: mild, moderate; Canal size: narrow, normal, wide; Calcified canals: no; Retreatment: no; Conservative access: no
- **Matching gutta-percha:** Dentsply Sirona Conform Fit Gutta-Percha for ProTaper Gold (F1, F2, F3, F4, F5)
- **Matching paper points:** Dentsply Sirona ProTaper Gold Absorbent Points (F1, F2, F3, F4, F5)
- **Content revision:** 2026-08-11

## FAQ

**What alloy is ProTaper Gold made from?**

ProTaper Gold® is manufactured from Gold Heat-Treated NiTi.

**How many files are in the ProTaper Gold sequence?**

The ProTaper Gold® system includes 8 files: SX, S1, S2, F1, F2, F3, F4, F5.

**What is the ProTaper Gold file sequence?**

ProTaper Gold® is used in this order: SX → S1 → S2 → F1 → F2 → F3 → F4 → F5. Per-file speed, torque and technique are in the protocol section above.

**What motion type does ProTaper Gold use?**

ProTaper Gold® uses continuous rotation motion.

**What cases is ProTaper Gold best for?**

ProTaper Gold® is best suited for: versatile multi-file sequence, complex anatomy, graduated shaping.

**What speed and torque settings are recommended for ProTaper Gold?**

Recommended settings: 300 RPM and 5-6 / 1.5-2 / 3-4 Ncm across the file sequence (refer to official DFU for full per-file parameters).

## References

- [Manufacturer instructions for use (DFU/IFU)](https://assets.dentsplysirona.com/dentsply/web/Endodontics/global-page-templates-assets/download-pdf's/protaper-gold/ProTaper%20Gold%20ROW%20DFU%20EN.pdf)
- [PubMed 31149617](https://pubmed.ncbi.nlm.nih.gov/31149617/)
- [PubMed 25841955](https://pubmed.ncbi.nlm.nih.gov/25841955/)
- [PubMed 34367289](https://pubmed.ncbi.nlm.nih.gov/34367289/)
- [PubMed 29142878](https://pubmed.ncbi.nlm.nih.gov/29142878/)
- [PubMed 41882642](https://pubmed.ncbi.nlm.nih.gov/41882642/)
- [PubMed 26011308](https://pubmed.ncbi.nlm.nih.gov/26011308/)
- [PubMed 26321062](https://pubmed.ncbi.nlm.nih.gov/26321062/)
- [PubMed 36700004](https://pubmed.ncbi.nlm.nih.gov/36700004/)
- [PubMed 36748451](https://pubmed.ncbi.nlm.nih.gov/36748451/)
- [PubMed 40603366](https://pubmed.ncbi.nlm.nih.gov/40603366/)
- [PubMed 41211526](https://pubmed.ncbi.nlm.nih.gov/41211526/)
- [PubMed 41934543](https://pubmed.ncbi.nlm.nih.gov/41934543/)
- [PubMed 42030017](https://pubmed.ncbi.nlm.nih.gov/42030017/)
- [PubMed 42261515](https://pubmed.ncbi.nlm.nih.gov/42261515/)

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