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Natural teeth sit in a periodontal ligament that lets them move slightly, cushion forces, and adapt to small discrepancies over time. Implants don't. They are fused directly to bone, so there's very little forgiveness for a restoration that doesn't fit precisely. A crown that would settle in comfortably on a natural tooth can create stress, loosen screws, or cause tissue problems on an implant. That makes the lab's precision, and the accuracy of the records the lab receives, especially important for implant cases.
A natural tooth can move a small amount within its socket. That movement helps distribute forces and hides minor errors in fit or occlusion. An osseointegrated implant moves far less. Any misfit between the restoration and the implant is transferred directly to the screw, the components, and the surrounding bone. Patients also have less tactile feedback from implants, so they may not notice a high spot or excess force until a problem develops.
For multi-unit implant restorations, the framework needs to seat passively, without forcing or straining the implants or screws. A framework that doesn't fit passively can lead to screw loosening, component fracture, porcelain chipping, or stress on the bone over time. Tightening screws can sometimes pull a poorly fitting framework into place, which hides the problem at delivery but leaves the system under constant tension.
Accurate records and precise milling are what make passive fit possible. Many clinicians confirm fit with a single-screw test, radiographs, or a verification jig before final delivery.
It starts in the office. Scan bodies must be fully seated, tightened appropriately, and scanned completely, including enough surrounding detail for accurate alignment. Impression copings must be secure and verified. For larger cases, a verification jig can confirm the accuracy of the impression or scan before the final framework is made. A small investment in verification can prevent a costly remake.
Each implant system has its own platforms, connections, and tolerances. The lab must use correct, compatible components and design libraries for your system. Always include the implant brand, system, connection type, and platform size for each site on the Rx. If you aren't sure, a photo of the implant packaging or sticker from the surgical record is very helpful.
Because implants can't sense pressure the way natural teeth do, occlusion on implant restorations is usually designed to be lighter, with careful attention to excursive contacts. Shallow cusp inclines and narrower occlusal tables can reduce off-axis forces. Good lab design protects both the restoration and the implant.
Restorations should support healthy tissue and give patients a way to clean around them. Over-contoured emergence profiles can trap plaque and irritate the tissue. That's especially important for implant bridges and full-arch prostheses, where the intaglio surface should be shaped so patients can clean underneath with floss threaders or water flossers.
Implant restorations face high forces with less cushioning. Material selection should consider span length, opposing dentition, bruxism, and esthetic needs. Monolithic zirconia is often used for strength, while layered options may be chosen in the esthetic zone.
Intraoral scanning with scan bodies, CAD design, and precision milling have made implant restorations more predictable. Digital design lets the lab plan screw access, emergence profiles, and connector sizes with precision, and digital files make it easier to adjust or reproduce restorations later. Our scanner setup guide explains how to send scans to our lab.
Common causes include non-passive fit, occlusal overload, incorrect torque, or incompatible components. Precise fit and careful occlusion reduce the risk.
For multi-unit and full-arch cases, a verification step is often recommended to confirm accuracy before the final framework is made. Ask your lab what they recommend for your case.
Compatible components exist for many systems, but fit and warranty considerations vary. Discuss options with your lab and follow the implant manufacturer's guidance.
From single crowns to full-arch solutions, see our implant restorations, or send a case today.
Gibson Dental Designs has been a full-service dental laboratory in Gainesville, Georgia since 1983. If you have a case you'd like to talk through, contact our team or call (770) 534-7288. Ready to get started? Send a case or order a starter kit.
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