Temporary cement is a dental luting material formulated to seat restorations, provisional crowns, bridges, or orthodontic appliances with controlled retention — strong enough to withstand normal function, yet weak enough to allow retrieval without damaging the underlying tooth structure. It bridges the gap between tooth preparation and definitive cementation, serving both a protective and diagnostic role.

How Temporary Cement Works

Unlike permanent cements that form durable chemical and mechanical bonds with dentin and the restoration surface, temporary cement achieves moderate adhesion through weaker physical interactions. This intentionally reduced bond strength allows the clinician to remove the restoration intact when treatment requires it — for example, when adjusting a provisional crown or transitioning to a final prosthesis. Most formulations also provide a marginal seal that limits bacterial infiltration and protects the exposed preparation from sensitivity.

Common Types

• Zinc oxide eugenol (ZOE) — the traditional standard, offering mild sedative effects on the pulp
• Non-eugenol zinc oxide — preferred when eugenol may inhibit subsequent resin bonding agents or composite polymerization
• Polycarboxylate-based temporary cements — offer slightly higher retention for extended provisional periods
• Resin-modified temporary cements — provide greater resistance to occlusal loading while remaining retrievable
• Calcium hydroxide bases — used as interim liners under longer-term provisionals to protect pulp vitality

Clinical Significance

Selecting the appropriate temporary cement is critical to provisional treatment success. Eugenol-containing formulations are contraindicated prior to resin-bonded restorations because residual eugenol inhibits polymerization at the dentin interface, potentially weakening the final bond. The cement must also provide a sufficient marginal seal to prevent microleakage, gingival inflammation, and postoperative sensitivity during the provisional phase.

Temporary cement enables clinicians to evaluate occlusal relationships, esthetic outcomes, and patient comfort before committing to permanent luting — making it an indispensable diagnostic tool in restorative and prosthodontic workflows.

Matching cement type to the clinical scenario — accounting for restoration material, provisional duration, and planned bonding agents — is the single most important factor in avoiding difficult removal, premature debonding, or a compromised final cementation result.