Clinical Resource
Pre-preparation scans and impressions for greater accuracy
Capturing a pre-preparation scan or impression before tooth reduction is one of the most practical ways to improve restorative predictability. This baseline record preserves the tooth’s original anatomy and occlusion, giving the lab a clearer reference for designing a restoration that seats more naturally and requires less adjustment.
In many cases, the pre-prep record helps bridge the gap between what the tooth was before treatment and what the restoration needs to become after preparation. That makes it useful not only for anatomy, but also for function, contour, and patient comfort.
This page explains why pre-prep records matter, how they fit into digital and traditional workflows, and what practical benefits they can provide for the practice.
Why this matters clinically
A pre-prep record gives the lab a reference that no final impression alone can fully replace. It preserves the original contours, contacts, and occlusal relationships before the tooth is altered.
Why a pre-prep record matters
- Baseline anatomy: A pre-prep record preserves the original contours, emergence profile, contact relationships, and occlusal form before the tooth is reduced.
- Functional reference: It gives the lab a clearer sense of how the tooth previously fit into the patient’s bite and helps support a more natural restorative result.
- Fewer adjustments: When the lab has a better reference for shape and position, the restoration is more likely to seat with less chairside refinement.
- Better patient experience: Easier seating appointments, less adjustment time, and more predictable delivery help both the practice and the patient.
In short, a pre-prep record gives the lab information that is often lost once the tooth is prepared. That information can make the final restoration more predictable.
Digital workflow
In a digital workflow, the best approach is usually to capture the unprepared scan first, then scan again after the tooth has been prepared. Sending both records gives the lab a direct before-and-after reference.
- Capture the unprepared tooth and surrounding arch before reduction.
- Capture the prepared scan after reduction and tissue management are complete.
- Include opposing and bite records when available.
- Add photos and notes when esthetics, anatomy, or special requirements matter.
When both scans are available, the lab can reference the original form of the tooth and surrounding dentition while designing the final restoration.
Traditional workflow
For traditional workflows, a quick pre-prep impression can still provide valuable anatomical guidance. Even when the final case is submitted conventionally, the pre-prep record can help communicate how the tooth originally functioned and fit into the arch.
- Take a pre-prep impression before tooth reduction.
- Include it with the final impression, bite, shade, and supporting records.
- Add photos or notes when esthetics or occlusal detail are especially important.
- Use the pre-prep record as an additional reference, not just a backup.
A traditional pre-prep record is often simple to capture but still very useful when the restoration is being designed.
Practical benefits for your practice
A pre-prep record supports more than just anatomy. In a practical sense, it can improve the overall workflow for the office by making the final restoration more predictable.
- Higher first-time fit and lower remake risk
- Reduced chair time and less adjustment at delivery
- Clearer communication between the office and the lab
- Better preservation of natural contour and occlusal feel
- Improved patient experience during the seat appointment
It is a small additional step on the front end that can make the restorative result more efficient on the back end.
A practical next step
If your team is already scanning or taking impressions routinely, adding a pre-prep record is often one of the easiest workflow upgrades to test on restorative cases.
Frequently Asked Questions
What is a pre-preparation scan or impression?
A pre-preparation record is a scan or impression captured before tooth reduction. It preserves the original anatomy and occlusion to help guide restoration design.
Why does a pre-prep record improve accuracy?
It gives the lab a reference for natural contours, emergence profile, and occlusal relationships before the tooth is prepared, which can improve design predictability and reduce adjustment time.
Do I need a specific scanner or material?
No. Most modern digital scanners work well, and traditional pre-prep impressions can also provide useful information. The key is capturing the record before tooth reduction.
How do I submit a pre-prep record?
Digital cases can include both the unprepared and prepared scans with the prescription and supporting photos. Traditional workflows can include a pre-prep impression along with the final case records.