Skip to content
Submit a Ticket
  • There are no suggestions because the search field is empty.

What are the limitations, contraindications, and longevity considerations for an Implant Crown and Bridge?

An Implant Crown and Bridge is a durable, long-term solution, but its success depends on respecting several biological and mechanical limits. Most failures trace back to a small number of avoidable issues: retained cement, improper torque, inaccurate impressions, and inadequate site readiness.

Retained cement and peri-implantitis

The single most cited risk for cement-retained implant restorations is excess subgingival cement. Because implant margins are frequently subgingival, excess cement is very difficult to remove completely, and what remains behaves as a bacterial reservoir that significantly increases peri-implantitis risk and potential implant failure.

The mitigation is strict cement-volume control and a thorough removal protocol, as detailed in the seating and cementation workflow article.

Mechanical and torque cautions

Abutment screws are engineered to a specific torque window, typically 25 to 35 Ncm per the manufacturer. Exceeding it can break the screw, which is by design a safety mechanism to protect the implant.

Screws also tolerate only about three tightening cycles before they should be replaced, so the torque wrench is reserved for final delivery rather than trial stages. For screw-retained designs specifically, monitor for cracks or chips around the access hole over time.

Case-selection limits

Closed-tray impressions require implants that are sufficiently parallel, and they are more error-prone than open-tray techniques because the copings are not splinted and must be removed and reseated into the impression. For multi-unit and non-parallel cases, that limitation pushes the case toward open-tray or digital capture. Incomplete impression-post seating, regardless of technique, produces inaccurate restorations, which is why radiographic verification of seating is mandatory.

Longevity and warranty

Longevity is also a function of the crown material chosen. ROE's published material warranties range from two years for most options up to six years for TLZ Zirconia with MiYO. The table below summarizes warranty by material so you can set patient expectations.

Crown material Warranty
TLZ Zirconia with MiYO® 6 years
zRc (Zirconia ROE Crown) 2 years
IPS e.max® Monolithic 2 years
IPS e.max® Layered 2 years
PFZ (Porcelain Fused to Zirconia) 2 years
PFM (Porcelain Fused to Metal) 2 years
Full Cast Metal 2 years

Clinical rule of thumb: the biology sets the ceiling. Healthy, well-shaped peri-implant tissue and clean margins do more for longevity than any single material choice.

For prerequisites that protect longevity from the outset, see the article on verifying integration, healing, and sulcus preparation.

 

Additional Resources

For more information concerning Implant Crown and Bridge:

Contact Information

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