Episode Details

Injection moulding is meant to save you time. Too often it hands you a mouthful of flash and a cleanup that swallows the chair time you thought you were saving.

Dr Sandra Hulac is a Clinical Instructor at the Kois Center in Seattle and an Accredited Fellow of the American Academy of Cosmetic Dentistry. She uses full-mouth injection moulding to road-test occlusions and stabilise breaking-down dentitions, and she teaches the technique hands-on.

In this episode she works through where the mess actually comes from, and how design, matrix strategy, careful PTFE and a simple cleanup protocol keep a case clean from the first injection.

This episode comes with an infographic: the whole no-mess workflow on one visual guide to keep beside you during design and cleanup. Download it at protrusive.co.uk/nomess. It is the fastest way to turn this episode into something you actually use at the chair.

What You’ll Take From This Episode

• Most injection-moulding mess is prevented at the design stage, through thickness targets and clear lab communication, long before any cleanup.

• The alternating matrix technique, injecting every other tooth, is the biggest single cleanup saver and cuts the PTFE you need.

• Matrices cured in a pressure pot, with a spacer protocol, give even thickness and far fewer bubbles.

• Thin, careful PTFE prevents distortion; bunching it interproximally creates the very excess you are trying to avoid.

• An S-shaped motion with a Ceri-saw and several 12-plate blades clears resin while protecting the contact.

• Good pre-treatment hygiene, using diluted hypochlorite or povidone-iodine rather than chlorhexidine, cuts bleeding and contamination.

Highlights of this episode:

• 00:00 Teaser
• 00:54 Introduction
• 02:17 Dental Pearl: Free Injection Moulding Infographic
• 03:17 Main Interview with Dr. Sandra Hulac
• 4:49 Innovations in Dental Education
• 07:26 The Mess Problem in Injection Moulding
• 15:38 Alternating Matrix Technique
• 18:18 Every-Other-Tooth Technique
• 27:54 Cleanup Instruments and Techniques
• 31:35 Handling Teflon and PTFE
• 36:41 Patient Oral Hygiene Tips
• 37:27 Dilution protocol:
• 39:24 Key Principles for Minimizing Mess
• 40:42 Matrix Fabrication and Spacer Protocol
• 43:55 Course Information and Conclusion
• 46:19 Outro

From the Guest

Master Full Mouth Injection Moulding in this exclusive two-day hands-on course!

📅 Dates: Feb. 26-27, 2027
📍 Location: Central London Venue (TBC)
🌐 Learn more & secure your spot: protrusive.co.uk/FMIM

Want more?

Learn to treat tooth wear with injectable composite in Injectable Composites in PDP081

Tags

#PDPMainEpisodes, #BreadandButterDentistry, #AdhesiveDentistry

Listen, subscribe, and earn CPD

Listen: Spotify, Apple Podcasts, YouTube, and inside Protrusive Guidance.

Earn CPD: This episode is eligible for 0.75 CE credit via the quiz on Protrusive Guidance.

Compliance: GDC Development Outcome C. AGD Subject Code 250 Operative (Restorative) Dentistry.

Aim & Learning Outcomes

Aim: To enable dental professionals to minimise cleanup during injection moulding by optimising design, matrix use, PTFE application, and