Nightguards: Hard, Soft, or Dual-Laminate? A Prescribing Guide
When to prescribe a hard acrylic, soft thermoplastic, or dual-laminate nightguard based on patient bruxism severity, comfort tolerance, and clinical goals.
"Patient grinds, send a nightguard." That Rx covers about half the cases that land in our removables department, and it leads to a lot of guards that don't quite fit the patient's actual condition. Here's how the three main nightguard types compare and which patient each one fits.
Hard acrylic (heat-cured or processed)
The standard for true bruxers and patients with active TMJ symptoms. Heat-cured acrylic is dimensionally stable, won't compress under occlusal force, and lets you balance the occlusion with even contacts and proper guidance. It's also the most durable, lasting 5+ years in a typical bruxer.
- Best for: confirmed bruxers, TMJ patients, patients with wear facets on natural dentition
- Trade-off: less comfortable initially, longer adjustment period
Soft thermoplastic
Comfortable to wear, easy to adjust to, but compresses under occlusal force, which can actually encourage clenching in some patients and provides limited protection against true grinding. Best for mild grinders or patients who can't tolerate a hard guard.
- Best for: mild parafunction, anxious patients who need an entry-level guard, athletic mouthguards
- Trade-off: shorter lifespan (1–2 years), less protection for severe bruxers
Dual-laminate (soft inside, hard outside)
Soft layer against the teeth for comfort, hard layer on the occlusal surface for durability and proper occlusal balance. The best-of-both-worlds option for many patients, though they cost more and require more careful adjustment than either pure type.
- Best for: moderate bruxers who can't tolerate a fully hard guard
- Trade-off: cost, and the bond between the two layers can delaminate over time
Coverage: maxillary vs. mandibular
Maxillary is standard and what we make by default. Mandibular guards can be specified for patients with strong gag reflexes, partial maxillary edentulism, or compliance issues with maxillary guards. Both work clinically when properly adjusted.
What to send with the Rx
- Maxillary and mandibular impressions or scans
- Bite registration in centric relation (not MIP) for TMJ cases
- Notes on bruxism severity, TMJ symptoms, and patient comfort history
- Type of guard requested, or write "tech to recommend" if you'd like our input
Standard turnaround on hard or soft guards is about 5–7 business days. Rush cases are available, call (508) 281-9997 before sending.
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