Digital Implant Scan Body Issues

Implant dentistry has never been more digital. Intraoral scanners, CAD software, guided surgery, and digital workflows have transformed how we restore implants. The promise is simple: greater accuracy, faster turnaround times, and fewer remakes.

Yet every dental laboratory has experienced those implant cases that simply do not make sense. Recently, we encountered a case involving an anterior implant crown. We manufactured the restoration, the crown was fitted, and the fit was incorrect. Naturally, we investigated, remade the case, double-checked the design, and produced a second restoration.

The second crown was also incorrect. At this point, most laboratories start questioning everything. Was the implant library wrong? Was the scan body incorrect? Was there an issue during manufacturing? Was the implant placed differently than expected?

When discussing the case with the clinician, I asked a simple question. "Did you take a radiograph to verify the scan body was fully seated?" The answer was no. The next response was one we've all heard before. "I don't get this problem with my other lab."

As laboratory professionals, we've learned that statements like this are rarely the end of the investigation. They're usually the beginning.

When we reviewed the raw scan data, the true cause became very clear.

The Hidden Problem with Digital Implant Scanning
One of the biggest misconceptions in digital dentistry is that scanners only capture what is physically present.
In reality, scanners capture enormous amounts of data which software then interprets, aligns, and stitches together.
For conventional crown and bridge work, this process is usually highly predictable.
Implants are different.

Unlike natural teeth, implants rely on scan bodies as reference points. The software must accurately identify the scan body geometry and precisely match it to the corresponding implant library.

If the scan body is not fully seated, rotated incorrectly, contaminated, damaged, or distorted during scanning, the software may still create a model that looks acceptable on screen.

The problem only becomes apparent later when the final restoration does not fit.

What We Found in This Case
After examining the original scan files, we discovered something interesting.

• The intraoral scanner workflow required three separate scanning stages.
• The soft tissue and arch were scanned first.
• The scan body was then scanned separately.
• Finally, an additional scan was taken over the top.
  
  

The software then attempted to stitch all three datasets together. When we reviewed the raw scan data closely, we could clearly see a step in the digital model where the datasets had not aligned perfectly.
This wasn't obvious when looking at the final stitched model. However, when examining the individual scan layers, the discrepancy became visible. In simple terms, the software was trying to merge multiple datasets that were not perfectly aligned. A tiny discrepancy at the scan body level can translate into a significant positional error at the restoration stage. Particularly in the anterior region where aesthetics and emergence profiles are critical, even fractions of a millimetre matter. (See images below)

Why the Problem Often Goes Unnoticed
One reason these issues can be frustrating is that the printed model often looks perfectly acceptable.

• The technician receives a digital file.
• The model is printed.
• The crown is designed.
• Everything appears normal.
• The hidden stitching errors are buried within the scan data itself.

Unless someone reviews the raw scans carefully, the issue may never be identified.

• The restoration is then blamed.
• The laboratory is blamed.
• The milling process is blamed.
• The implant library is blamed.

Meanwhile, the real problem remains inside the scan file.

The Importance of Verifying Scan Body Seating
A surprising number of implant scan body issues originate before scanning even begins.
The scan body must be completely seated.

• Not mostly seated.
• Not nearly seated.
• Completely seated.

In many cases, a simple radiograph can immediately confirm this. Modern scan bodies are manufactured to extremely tight tolerances. If they are even slightly elevated, the resulting digital position may be inaccurate enough to create restorative complications. Taking a quick radiograph before scanning can save hours of frustration later. It can also prevent expensive remakes and additional patient appointments.

More Data Does Not Always Mean Better Data
One of the lessons from this case is that more scanning does not necessarily create greater accuracy.
In fact, excessive scanning can sometimes create additional opportunities for alignment errors.
Many clinicians assume that capturing more images, more passes, or more datasets must improve the result.
Digital dentistry doesn't always work that way.

• Every additional dataset requires software processing.
• Every additional stitch creates another opportunity for minor inaccuracies.
• Those inaccuracies may be insignificant for an aligner model or study cast.

For implant restorations, they can become highly significant.

An Alternative Approach We've Seen Work Well
Interestingly, we've experienced excellent success when clinicians use a more straightforward scanning approach.
Rather than following complex multiple-pass workflow:

• Scan the full arch in a consistent manner, similar to how they would for aligner cases.
• They then provide the implant information, restorative prescription, and relevant implant details alongside the scan.
• This approach often produces cleaner datasets with fewer stitching artefacts.
• The software has less information to merge.
• The technician receives a more coherent digital model.
• The result is frequently a more predictable restoration.
  
  

Every scanner system is different, and clinicians should always follow manufacturer recommendations. However, understanding how data is processed can help identify potential causes when issues arise.

Why Communication Between Dentist and Laboratory Matters
One of the biggest advantages of working with an experienced dental laboratory is that we don't simply manufacture restorations.

• We investigate problems.
• When a case does not fit, our responsibility is not to assign blame.
• Our responsibility is to identify the root cause.

The best outcomes occur when clinicians and laboratories work collaboratively. If a restoration does not fit, reviewing the scan data together often reveals valuable insights.
The goal is not to determine who was right or wrong. The goal is to prevent the same issue from happening again.
Every remake represents lost chairside time, laboratory time, administrative time, and patient confidence.
Finding the cause benefits everyone.

Practical Tips for More Predictable Implant Scans
• Verify scan body seating clinically before scanning.
• Consider taking a radiograph to confirm complete seating.
• Ensure scan bodies are clean and free from debris.
• Follow a consistent scanning path.
• Avoid unnecessary rescanning where possible.
• Review scans carefully before submission.
• Check for visible stitching errors around the scan body.
• Provide complete implant information with every case.
• Contact your laboratory if anything appears unusual.
• Encourage collaborative troubleshooting when issues arise.

The Bigger Picture
Digital dentistry is incredibly powerful. The accuracy achievable today would have seemed impossible just a decade ago. However, digital workflows are only as accurate as the data captured at the beginning.
A scanner cannot correct a poorly seated scan body. Software cannot always detect subtle stitching errors.
Artificial intelligence cannot compensate for missing clinical verification.

Technology is an incredible tool, but clinical protocols remain essential.
When implant restorations do not fit, the answer is not always in the crown, the laboratory, or the manufacturing process. Sometimes the answer is hidden within the scan itself.
By understanding how scan data is captured, stitched, and interpreted, clinicians can dramatically improve predictability, reduce remakes, and deliver better outcomes for patients.

At Bremadent Dental Laboratory, we review hundreds of digital cases every month and continue to see one consistent truth: the quality of the final restoration is directly linked to the quality of the data received.

A few extra minutes spent verifying a scan body can save everyone involved hours of frustration later. Most importantly, it helps ensure that patients receive the predictable, high-quality implant restorations they deserve.

We provide a trusted laboratory service delivering consistent quality, saving chairside time, and supporting predictable patient outcomes.

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