Have a scan on file from another office, or from a few years back? It may or may not suit the work you need now. For Halton Hills households, here is how dentists judge whether an existing digital impression is still useful or a fresh one is needed.
Digital files are easy to keep, so it is natural to wonder whether a scan taken earlier, perhaps for a guard or at another practice, could be used again. To answer that, start with what an impression is for. It records the shape and arrangement of teeth and surrounding tissues at one moment, so that a restoration, appliance or plan can be developed. An optical scanner stores that record as a virtual model.
Because it is a snapshot, a scan is only as current as your mouth. It is a record-gathering step, not treatment. For suitable cases it can replace an impression tray, but the area concerned, the proposed work and the level of detail required all affect whether a new record is needed and which method fits. A file existing does not make it right for the job.
Mention any earlier records when you book, and ask how impressions would be taken for your current care. Let us know, too, about a strong gag reflex, a jaw that does not open easily or an impression that once went poorly. The team can explain what is suitable without assuming one method or one file fits every case.
Every impression should match a specific treatment. Ask which surfaces this piece of work depends on, and whether an existing model shows them clearly enough.
A crown may depend on a freshly prepared tooth, which an older scan cannot show. Other restorations and appliances need detail of neighbouring teeth and the bite. Start with what the treatment requires, and the right record follows from there.
Hoping to reuse an old file is sometimes about avoiding an unpleasant impression. Say so. If a new record is needed, scanning may be discussed where it suits the work, though it still involves a device in the mouth and comfort cannot be guaranteed.
Movement of teeth, a replaced filling, wear or a different plan can each make an earlier model unreliable. Describe what has happened since. The dentist decides whether the existing record still provides what the current work needs.
Any digital impression, old or new, records surfaces only. It is distinct from dental X-rays and CBCT scans and cannot replace imaging needed to look at roots, bone or other structures beneath the surface.
A fresh optical model reflects your teeth on the day the work is planned. Because it appears during capture, the team can usually spot a missing area and record it again on the spot, before the file is passed on for clinical and laboratory work. The aim is a dependable record of the right surfaces, whatever its age.
Not having a tray full of material can make the appointment more comfortable for some patients. Others notice little difference, and how long scanning takes depends on the case. Before recording begins, talk about breaks, how wide you can open and what position suits you.
Patient information: UCLH — digital impressions in dental care
Where the system permits, the team can show you the current model and explain why nearby teeth or the opposing arch are included. Seeing it can make clear why an older file may fall short. The model aids planning and is not a diagnosis.
A suitable file may be shared through the appropriate professional workflow to help design or manufacture your restoration or appliance. Ask what that stage involves and who manages it. A finished scan does not, by itself, set a completion date.
The model must contain the details the planned work relies on. Where something is unclear, another pass or another method may be used. That review is part of ending up with an impression that will actually serve its purpose.
Your appointment depends on the treatment being planned. Confirm whether you are coming in for records alone, or whether preparing a tooth, fitting a temporary or other care is also scheduled.
The dentist looks at what is on file, explains why a new impression may or may not be needed and whether scanning is suitable and available. Ask about limits, alternatives and fees, and raise any comfort concerns.
The scanner needs clear, accessible surfaces. Drying or careful handling of the surrounding gum may be part of this, depending on the procedure. A tooth prepared for a restoration must have its finishing edges captured clearly.
A handheld scanner is moved over the relevant teeth to build an up-to-date model. The opposing teeth and how they meet may also be recorded. Follow instructions on positioning, and use the agreed signal if you need a break.
The team checks the record against what the work requires, rescanning or choosing another method if needed. Confirm your next appointment, any instructions for temporary work and when the finished piece will be assessed for fit.
Scanning by itself generally needs no recovery. Freezing, shaping of a tooth, temporary work or any other care carried out at the same appointment may have instructions of its own.
If you leave with a temporary restoration, follow the dentist’s eating and cleaning advice. Call if it loosens, breaks or begins to hurt. A final restoration being scanned already does not make a damaged temporary something to leave.
If a tooth chips, work is redone at another office or your bite changes after the scan, tell us. The record may need to be checked again, just as an older file would. Fresh soreness or swelling is a reason to call, not to sit tight.
A restoration or appliance needs clinical checks when it is delivered. Ask about fit, bite, comfort, cleaning and adjustments. Making it digitally does not remove the need for that review, or follow-up if something feels wrong later.
Ask about the treatment planned, the method suited to your case and whether existing files can help. Clear answers connect each record to a defined clinical purpose.
Contact our Bronte Street practice about the restoration or appliance you are planning and any records you already have. We can explain which impressions may be required and confirm the arrangements for your care. Questions about comfort, timing and record transfers are welcome.
Whether scanning is suitable and available depends on your treatment. The scanner images shown are illustrations and do not represent equipment at the clinic.
