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How do you seat and cement a Full Cast Metal restoration?

Seating a Full Cast Metal restoration is straightforward, and gold's malleability works in your favor: it adapts precisely at the margin during cementation, contributing to the superior marginal seal the material is known for. Disciplined cement control is still essential to protect the tissue and the margin.

Preparing the restoration and seating

Clean the inside of the crown with a cleaning solution before delivery. Apply cement along the internal walls and do not overfill, keeping the film thin and away from the margins. Seat the crown under firm finger pressure and have the patient bite to confirm full seating. For non-retentive preparations, ROE notes that light aluminous oxide abrasion at 20–40 lbs may be used to improve retention.

Why cement volume control is critical

Excess cement is one of the most common and most damaging delivery errors. Studies cited by ROE indicate clinicians routinely use about 20 times more cement than needed, with roughly 95% extruding beyond the margins. Excess subgingival cement drives gingival inflammation, bleeding, and bone loss, and it obscures the margin during cleanup. Apply only a thin film: enough for retention, not enough to extrude.

Clinical rule of thumb: A thin film of cement kept back from the margins protects the tissue, the margin seal, and the longevity of the restoration.

Removing excess and finishing

Remove excess cement while it is still in the rubbery stage, using floss and scalers to clean subgingivally and around every margin. Then check and adjust proximal contacts, emergence profile, and occlusion in centric and excursive movements, and polish all adjusted surfaces. Thorough cleanup and a smooth, well-adjusted surface support both periodontal health and the long service life (often exceeding 20–30 years) that makes cast gold so durable.

 

Additional Resources

For more information concerning the Full Cast Metal:

Contact Information

For help with a Locator Fixed solution for your next case, contact ROE Dental Laboratory: