Denture Relines and Rebases: Keeping a Denture Fitting

What reline, rebase and tissue conditioning involves

As the ridge under a denture shrinks, the appliance stops fitting. A reline adds a new layer of material to the tissue surface of the existing denture so it matches the ridge again, keeping the teeth and the base as they are. A rebase replaces the entire base material while keeping the teeth. Tissue conditioning places a soft temporary material inside the denture to let inflamed or distorted tissue recover before an accurate impression is taken. Relines come in two forms. A chairside or direct reline is done in the surgery in one appointment, with the material cured in the mouth — quick, cheaper, slightly less accurate and less durable. A laboratory or indirect reline involves taking an impression inside the denture and sending it away, which produces a better result but means being without the appliance for a day.

When this treatment is used

Relines are needed every few years for most denture wearers, and within a few months for an immediate denture. Tissue conditioning is used first where the tissue is red, swollen or distorted from wearing an ill-fitting appliance, which is common in patients who have not been seen for years.

Why a reline is usually the right answer before a remake

A denture that has become loose is most often a fit problem, not a worn-out appliance. If the teeth are intact, the base is sound and the bite is acceptable, a reline restores function for a fraction of the cost of a new denture — and plans will pay for relines more often than they will pay for replacements. The cases where a remake is genuinely better: worn-down denture teeth that have lost the bite, a base cracked repeatedly, teeth that are the wrong size or shade after years of change, or a jaw relationship that has shifted so far that relining would lock in a bad bite.

The tissue conditioning step people skip

Taking an impression inside a denture while the tissue beneath it is inflamed and compressed produces a reline that fits inflamed tissue — and once the inflammation resolves, it is loose again. Tissue conditioning with a soft material worn for a week or two lets the tissue rebound so the impression captures its real shape. It also has a diagnostic role: a patient whose soreness resolves with conditioning had a fit problem, and one whose soreness persists may have something else going on that needs investigating.

Costs and insurance in summary

Typical fee range across the group: $0–$0 where a single band applies. Several codes here are priced individually and carry their own range on their own page. Laboratory relines and rebases cost more than chairside relines. All are far cheaper than a replacement denture.

Benefit category: Major prosthodontic, typically 50% on a typical plan. Covered as a major benefit, with frequency limits that are more generous than those for replacement dentures. Relines within six months of a new denture are normally included in the original fee.

Common restrictions: Usually not payable within six months of a new denture; Frequency commonly limited to once every 24–36 months; Tissue conditioning may be limited to two applications per appliance.