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Is rotary really better than reciprocating?
Can you safely skip the glide path with modern reciprocating systems?
What is the best file system for a GDP who wants predictable endodontic results?
And perhaps the biggest question of all: does the file system matter as much as we think it does?
In Part 2 of the Endo Showdown, Dr Samuel Johnson returns to tackle some of the most common questions dentists have about file systems, glide path preparation, retreatment, and endodontic workflow. From practical negotiation tips to choosing a system that works in your hands, this episode focuses on the decisions that can make endodontics simpler, safer, and more predictable.
Protrusive Dental Pearl
Cut your gutta-percha at the level of the canal orifice and thoroughly clean the pulp chamber before placing the coronal restoration.
⚠️ Leaving gutta-percha and sealer coronally can compromise the coronal seal and promote leakage.
✅ Use isopropyl alcohol to clean resin-based sealer residue before bonding. Water is effective for cleaning bioceramic sealers.
Key Takeaways
- Establish a glide path before shaping whenever possible.
- D-Finders can negotiate difficult canals more predictably than traditional K-files.
- Intermediate files such as size 12 or 12.5 can help bridge the jump from size 10 to size 15.
- Straight-line access reduces file binding and improves shaping efficiency.
- Avoid forcing glide path files to working length.
- Gates Glidden drills may be unnecessarily aggressive for routine coronal flaring.
- Consistency with one file system is often more important than chasing the latest product.
- WaveOne Gold remains a simple and user-friendly option for many GDPs.
- Rotary and reciprocating systems can both achieve successful outcomes when used appropriately.
- A good glide path is often more important than the type of motion being used.
- Hand files and Hedström files remain valuable during retreatment.
- Mechanical GP removal near the apex increases the risk of extrusion.
- Solvents are best reserved for residual gutta-percha rather than used at the start of retreatment.
- Understanding motor settings, torque, and RPM improves file safety and efficiency.
- Knowing when to refer is a sign of clinical maturity, not weakness.
- Clear consent and expectation management reduce stress for both clinician and patient.
Highlights of this episode:
- 00:00 Teaser
- 01:09 Introduction
- 02:15 Protrusive Dental Pearl: Coronal GP Removal & Pulp Chamber Clean-Up
- 03:59 Glide Path File Protocol & Canal Negotiation
- 06:24 Access Cavity Design & Coronal Flaring in RCT
- 08:38 File Taper & Canal Preparation Philosophy
- 09:54 Managing Difficult Canals in Endodontic Treatment
- 11:48 When to Introduce the Glide Path File
- 13:24 Using Intermediate File Sizes
- 15:39 Useful Negotiation & Shaping Tips
- 17:19 Choosing a File System
- 20:19 Rotary vs Reciprocating in Clinical Practice
- 21:29 Motor Settings & File Control
- 21:40 XP-Endo & Specialised File Designs
- 22:37 Retreatment Files & GP Removal
- 23:29 Preferred Gutta-Percha Removal
- 24:30 Midroll
- 27:51 Preferred Gutta-Percha Removal
- 32:03 Recommended System for Simplicity
- 33:26 Building Skills Faster in Endodontics
- 36:55 Consent & Managing Expectations
- 42:33 Reciproc vs WaveOne Gold
- 43:04 Preferred Retreatment Protocol
- 44:15 Using Rotary Files in Reciprocation
- 45:54 Curved Canals & Shaping Efficiency
- 47:14 Can Reciproc Blue Bypass the Glide Path?
- 50:12 Outro
Want more?
Check out the previous episode with Dr. Samuel Johnson: Working Lengths and Troubleshooting Apex Locators – PDP216
🦷 Looking for an endomotor?
Upgrade your endodontic workflow with the Woodpecker Endo Radar Pro. Head to protrusive.co.uk/endomotor and use coupon code PROTRUSIVE at checkout to claim an exclusive discount and your choice of complimentary file system.
🎁 Subscribe to Dr. Samuel Johnson’s amazing YouTube Channel: I Love The Pulp for more helpful endodontics tips and tricks.
#PDPMainEpisodes #EndoRestorative
This episode is eligible for 0.75 CE credit via the quiz on Protrusive Guidance.
This episode meets GDC Outcomes C
AGD Subject Code: 070 – Endodontics
Aim: To enhance clinicians’ understanding of glide path preparation, rotary and reciprocating instrumentation, canal negotiation, retreatment strategies, and risk management in contemporary endodontic practice.
Dentists will be able to –
- Dentists will be able to evaluate the role of glide path preparation in improving shaping efficiency and reducing procedural errors.
- Dentists will be able to compare practical considerations when using rotary and reciprocating file systems.
- Dentists will be able to apply safe and predictable approaches to canal negotiation, retreatment, and clinical decision-making.
Continuing Education Information
This activity may be eligible for continuing education credit through Protrusive Guidance. Participants must complete the associated quiz inside Protrusive Guidance to obtain CPD certification.
Cost:
Access to this CE activity is included with an active Protrusive Guidance membership. Current membership pricing is available at
www.protrusive.app.
Cancellation & Refund Policy:
Memberships may be cancelled at any time. Access to CE activities remains active until the end of the current billing cycle. Subscription charges are non-refundable once processed. Full details are available at
www.protrusive.app.
