Implant Crown Submission: What to Confirm Before You Send the Case

Implant crowns fail on small certainties: a platform assumed instead of verified, a scan body from the wrong library, a torque value nobody wrote down. This checklist makes those certainties explicit before the case leaves your office.

Short answer: before an implant crown case leaves your office, five things must be confirmed in writing - the implant system and platform, the scan body used, the retention mode, the abutment geometry the space allows, and the torque specification. Everything else in implant crown work is detail. These five are the difference between a case that flows and a case that comes back with a question a day later.

Implant work is unforgiving in a way that tooth-borne work is not: the components are branded, proprietary and exist in dozens of variants, and the cost of an assumption is not a remake - it is a component ordered, a patient rescheduled, sometimes a healing abutment disturbed. We verify every incoming implant case at intake, and this post is the checklist we verify against. Use it before you press send and the verification will be confirmation, not archaeology.

1. System and platform - named, not guessed

"A Straumann" is not an answer; Straumann sells tissue-level and bone-level lines in multiple diameters and connection geometries. The complete identification is brand, product line, platform diameter, and generation where relevant - for example "Nobel Biocare Replace Select Tapered, NP". If you are not certain what is in the mouth, photograph the healing abutment or the driver engagement and send the photo; labs match components from those images more often than you would think. What you should never do is let the platform be inferred from the scan, because two platforms can scan nearly identically and mill very differently.

2. Scan bodies - the highest-leverage twenty seconds

A scan body translates the implant's internal geometry into your file. Two failure modes dominate: the wrong library (the software matches the scan to a catalogue entry that does not match the implant in the mouth) and the loose or damaged scan body (the scan captures wobble, the position is off by fractions of a millimetre, and everything downstream inherits the error). The fixes are cheap: confirm the scan body brand and catalog number in the prescription, seat it finger-tight with light pressure - never force it - and visually confirm it has not picked up debris before scanning. Then verify in the design file that the virtual implant position matches your clinical expectation of the emergence point. That last check is the one nobody does and everybody should.

Note also what a good lab does on its side: every incoming implant case gets component verification at intake - the scan-body fit is checked against the library, the platform is confirmed against the prescription, and any mismatch comes back to you the same day, before design. A lab that skips this is transferring your risk into production, where it is more expensive.

3. Screw or cement - deciding early, not at the try-in

The retention decision drives the entire design: screw-retained means a Ti-base, a screw channel through the crown, an access discussion; cemented means a Ti-base or custom abutment with a crown cemented extra-orally, and a cement-line hygiene conversation. Neither is universally right - the choice follows the implant position (screw channels want to exit somewhere tolerable), the aesthetics (a facial screw channel on a central incisor is an enemy), and your delivery workflow. Deciding it in the prescription keeps the design coherent; deciding it at try-in means the design restarts.

• Screw-retained when the channel can exit harmlessly (often palatal on anteriors, central on molars), retrievability matters, or cement excess risk is unacceptable (peri-implantitis history).
• Cemented when the screw channel would compromise aesthetics or occlusion and the seating margin is reachable for cleanup - typically 1.5-2mm+ below the margin line, on a platform you can access.
• Either way: record the torque spec on the prescription, and where the channel will exit if screw-retained.

4. Abutment geometry - let the space talk

The interocclusal space at the implant position decides what is physically possible: crown height, material thickness, whether the Ti-base and ceramic stack can carry the occlusal load. Seven millimetres opens every option; four millimetres is a conversation about screw-retained monolithic designs. Measuring and stating the space in the prescription - one number, one position - removes the most common design-stage surprise. Include the emergence profile wishes too: deep or shallow, scalloped or straight, and whether a custom profile should match the healing abutment the tissue has already shaped.

5. Documentation and traceability

The quiet advantage of a disciplined lab: every component that enters the case - Ti-base, screw, abutment - is logged with brand, lot and supplier. When a patient record or an audit asks what is in the mouth, the answer comes from a case history rather than memory. Ask whether traceability is included in the case documentation, and what form it takes. The labs that answer instantly are the ones whose component handling you want.

Where implant cases actually go wrong

Every bar on that chart is checkable in five minutes at the chair - before the case is sent, when the fix is free. After design, the same bars cost a redesign. After milling, a remake. Timing is the entire economics of this checklist.

Multi-unit implant cases: where the stakes compound

Everything above scales up - and so do the failure costs - for bridges, hybrid bars and full-arch work. Three additions matter. First, verification: multi-unit designs justify a printed or milled verification jig that confirms the designed implant positions against the mouth before the framework is made. It is one extra appointment and it deletes the category of error where a full-arch framework is milled to a fantasy of 0.2mm drift. Second, passivity: long-span screw-retained frameworks are designed to seat without force; if a framework seats only under pressure, the design conversation happens before anything is veneered. Third, staging: full-arch work typically runs trial insertion of the framework, then a try-in of the setup, then the finished case - three dispatches, not one. The case plan should name those stages in advance with the appointments attached, because staging improvised over email is where delivery dates die.

The prescription for multi-unit work also carries one field single units do not: the occlusal scheme across the arch. Group function, canine guidance, balanced or fully bilateral - the design cannot be correct against a scheme nobody stated. A short paragraph in the prescription saves an arch-wide redesign, and a photo of the existing guidance (or the old prosthesis, which the patient may already approve of) is worth more than the paragraph.

What good intake verification looks like from your side of the table

Worth stating plainly what you should expect back after pressing send, because the reply is itself diagnostic of the lab. Within one working day: confirmation that the platform and library matched, the retention mode registered, the space measured, and - if anything did not reconcile - a specific question with the evidence shown ("the scan body on position 24 reads as brand X library but your prescription says Y - please confirm"). A reply that merely says "received, thank you" tells you the verification step may not exist. We built our intake verification checklist precisely because the early version of this post was a list of things that had gone wrong; the checklist is the post, operationalised, and any lab you work with should be able to show you theirs.

Frequently asked questions

Frequently asked questions

Frequently asked questions