Interim Therapeutic Restorations (ITR)

Board takeaway

• Purpose: ITR is a provisional caries-control restoration when conventional restorative care must be delayed or is not feasible.
• Care plan: use it within comprehensive care in the dental home, with prevention, follow-up, and a plan for definitive treatment.
• Best success: single-surface or small two-surface restorations.
• Technique: protect the pulp and obtain an adequate peripheral seal.

ITR and ART: therapeutic goals

• Atraumatic/alternative restorative techniques (ART) arose as a caries-restoration and prevention approach for populations with limited access to conventional care; WHO has endorsed ART.
• ART and ITR use similar techniques, but their treatment goals differ.
• The ITR policy cautions against interpreting lack of follow-up as proof that a provisional restoration is definitive.
  • The restorative best practice separately describes ART as intended definitive treatment in settings with limited access.
  • State the therapeutic intention and follow-up plan rather than treating the two labels as interchangeable.
• ITR describes the provisional approach used in contemporary US pediatric practice; placement alone does not complete comprehensive care.

When to consider ITR

• Young or uncooperative patients, or patients with special health care needs, when conventional preparation or restoration cannot yet be accomplished.
• Patients needing additional acclimatization or improved cooperation before definitive restorative treatment.
• Multiple open caries lesions: interim caries control or use within stepwise excavation before definitive restorations.
• Erupting molars when isolation is inadequate for a definitive restoration.
• Active lesions awaiting treatment under general anesthesia.
• Circumstances requiring reduced aerosol generation during restorative care.
• Goals may include restoring lesions, arresting disease, or preventing further progression; suitability depends on the clinical circumstances.

Placement and failure risks

• Remove caries with hand or rotary instruments, taking care to avoid pulp exposure.
• Maximize caries removal at the lesion periphery to reduce restoration leakage; do not turn this into a mandate for aggressive excavation near the pulp.
• Restore with an adhesive material, such as conventional glass ionomer or resin-modified glass ionomer cement.
• Single-surface and small two-surface restorations have the greatest success.
• Inadequate preparation, poor retention, and insufficient restorative bulk can cause failure.
• This policy supplies no numerical lesion-size cutoff, formal contraindication list, or pulp-diagnosis treatment algorithm. Its support for ITR should not be expanded into indications it does not address.

ITR versus ART: same materials, different goal

Do not infer permanence from material alone. ITR is most successful in single-surface or small two-surface restorations; bulk and margin control matter. Reduced cariogenic bacteria may rebound by six months without further treatment, which is not a universal replacement deadline.

Prevention and follow-up

• Provide ongoing care, including topical fluoride and oral hygiene instruction; these may improve outcomes in patients at high caries risk.
• Glass ionomers release fluoride and can be recharged with fluoride.
• Cariogenic bacterial levels may decrease immediately after placement, but can return to pretreatment levels over approximately six months without additional treatment.
• ITR also may reduce caries risk in adjacent teeth; this is a possible benefit, not a guarantee.
• Six months is an observation about bacterial rebound, not a prescribed recall interval or deadline for replacement. The policy does not specify either interval.

Evidence basis

• The update used electronic and hand literature searches, organizational resources, and expert or consensus opinion.
• The search identified 291 articles for screening; this does not mean all were included as supporting evidence.
• This is a policy with cited evidence, without formal recommendation-strength or certainty grades. Preserve conditional language for potential benefits and improved outcomes.

Common board traps

Answer aloud

When is an interim therapeutic restoration appropriate?

Use provisional caries control when conventional restoration is not feasible yet or definitive care must be postponed.

• Examples: limited cooperation, SHCN, erupting molar with poor isolation, additional acclimatization, or active lesions awaiting general anesthesia.
• It may support stepwise treatment of multiple open lesions and reduced-aerosol care.
• Place it within comprehensive dental-home care, with prevention and definitive planning.

What determines technical success of an interim therapeutic restoration?

Protect the pulp, achieve a peripheral seal, and provide adequate retention and material bulk.

• Hand or rotary caries removal is described; avoid pulp exposure.
• Use an adhesive material such as glass ionomer or resin-modified glass ionomer.
• Single-surface or small two-surface restorations have greatest success.
• Poor preparation, retention, or bulk increases failure risk.

Does the reported six-month bacterial rebound establish an ITR replacement deadline?

No. It is an observation without additional care, not a recall or replacement rule.

• Reassess restoration integrity and disease response; continue topical fluoride and hygiene instruction.
• Immediate reduction of cariogenic organisms is not sustained disease control by itself.
• State the provisional intention and follow-up plan; absence of follow-up does not prove a definitive restoration.