Dental Lab Essentials
Dental acrylics and reline materials are foundational to prosthetic dentistry. Whether you're a seasoned lab technician or a clinician handling chairside procedures, understanding the differences between acrylic types — and knowing which reline product fits the job — makes all the difference in patient outcomes and appliance longevity.
This guide breaks down the science, clinical applications, and best practices, with product recommendations sourced directly from My DDS Supply.
What are dental acrylics?
Dental acrylics are polymethyl methacrylate (PMMA)-based materials used to fabricate dentures, orthodontic appliances, custom trays, and provisional restorations. They polymerize — transitioning from monomer liquid to rigid polymer — through one of three mechanisms:
Understanding denture reline materials
Relining restores the fit of an existing denture by adding new material to the tissue-bearing surface. As the alveolar ridge resorbs over time, relines prevent rocking, sore spots, and bone loss caused by an ill-fitting appliance.
There are three main reline categories:
Hard relines
Performed chairside or in the lab using autopolymerizing or heat-cure acrylic. Hard relines are durable, long-lasting, and closely mimic the feel of the original denture base. They are the preferred option for most stable patients.
Clinical tips for best results
Always follow the manufacturer's powder-to-liquid ratio precisely. Deviating from recommended P:L ratios increases porosity, reduces strength, and can cause exothermic burns during chairside procedures.
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