ANSWERS

How to choose a night guard material

Night guard material selection depends on bruxism severity, occlusal scheme, and wear pattern. Hard acrylic suits heavy grinders and posterior wear cases. Dual-laminate (soft inner, hard outer) fits moderate clenchers needing comfort plus durability. Soft thermoplastic works for mild bruxism or short-term use only.

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Why it works this way

Match material to bruxism severity

The single biggest variable in night guard material selection is how hard the patient grinds. Heavy bruxers (the ones whose enamel is already flat on the canines and first molars) destroy soft guards in months. A 2023 Journal of Prosthetic Dentistry review found hard acrylic guards averaged 3 to 5 years of clinical service life, while soft thermoplastic averaged 6 to 12 months under heavy load. For mild clenchers with no visible wear facets, soft is comfortable and cheap. For anyone with documented wear, hard acrylic or dual-laminate is the defensible call.

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How long does a hard acrylic night guard last compared to soft?

Per the 2023 Journal of Prosthetic Dentistry review, hard acrylic averages 3 to 5 years of clinical service life under typical bruxism load. Soft thermoplastic (EVA) averages 6 to 12 months before perforation, tearing, or loss of retention forces replacement. Dual-laminate falls between, typically 2 to 3 years. For heavy bruxers the cost-per-year math favors hard acrylic even though the upfront fee is higher. Document the wear pattern at delivery so the replacement interval is defensible to the patient.

Should the night guard go on the upper or lower arch?

Maxillary is the default for most cases because it gives the most predictable canine guidance and anterior disclusion in lateral excursion. Mandibular guards are appropriate when the upper arch presents contraindications: heavy anterior restorations that complicate occlusal adjustment, prominent palatal tori, severe gag reflex, or sleep apnea appliance interference. Document the arch decision on the lab slip with the reasoning. A mandibular soft guard in a heavy bruxer is the most common failure pattern we see returned for remake.

Can a night guard be fabricated from an intraoral scan instead of an impression?

Yes. Dani Dental accepts intraoral scans from all major systems (iTero, Trios, Primescan, Medit, CEREC) for night guard fabrication. Digital workflow shortens turnaround by 1 to 2 business days versus PVS impressions and eliminates the model-pour error window. For hard acrylic guards we mill from a puck; for dual-laminate we thermoform over a printed model. Scan accuracy on the opposing arch and the bite registration matters more than the material choice for final fit. Send full-arch scans of both arches plus a centric bite.

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This answer is one piece of a larger workflow. The pillar page covers materials, turnaround, and how we build the case to your specification.

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