How long do sleep appliances last?

For general dentists prescribing oral appliance therapy, the durability question comes up at every delivery appointment. Hard acrylic devices milled from a verified digital scan tend to hold occlusal geometry longer than pressure-formed thermoplastic versions. Appliances delivered with a passive titration design place less repetitive stress on the hardware, extending functional life. Documented fit accuracy at the time of delivery is the single strongest predictor of longevity: a poorly adapted appliance wears unevenly and fails sooner.

Bruxism is the primary accelerant of wear. Patients who grind heavily may need evaluation at 18 to 24 months rather than waiting for a clinical failure. A well-fabricated hard acrylic appliance that still achieves mandibular repositioning at the 3-year mark is functioning correctly. One that has lost retention or shows compromised hinge integrity at 18 months is a material or fit failure, not a category failure.

When ordering through Dani Dental, the technician on the case documents the exact bite registration, material selection, and occlusal contacts. That record supports any future remake evaluation: the clinician knows what was built, when, and why. Turnaround on appliance remakes runs 5 to 7 business days from impression receipt, limiting disruption to the referring patient's therapy timeline.