First identify what is missing: implant-position data, soft-tissue geometry, or the registration that joins separate scans. Photogrammetry records implant positions; it does not capture the surrounding tissue contours, which must come from an intraoral scan (IOS) in the workflow described by the ITI. If the surface or coded feature was never captured, rescan it. If the corresponding data are present but do not line up, use the scanner’s documented alignment procedure. Mesh repair is for eligible defects—not a substitute for capturing clinical anatomy.
Identify which data stream has the defect
In a full-arch implant workflow, extra-oral photogrammetry (EPG) records implant positions, while IOS supplies soft-tissue morphology and mucosal contours. The datasets may also need to be registered to standard scan-body library geometry. A missing gingival surface may therefore be an IOS capture gap rather than a photogrammetry failure. The ITI workflow guide describes these separate datasets and their alignment.
- Implant position or coded geometry is missing: Check scan-body compatibility, seating, condition, visibility, and acquisition before attempting alignment.
- Soft tissue is missing: Inspect the IOS dataset and rescan the uncovered region if necessary.
- Both datasets exist but do not match: Check the registration workflow and use the scanner’s supported manual alignment, if available.
- The defect appears after scan-body conversion: Do not assume a universal cause. SHINING 3D’s support index lists a FAQ titled “Why there is a Missing Part of Scan Bodies after Convertion?” but the index does not provide its answer. Check the exact scanner and software version, library, and workflow instructions. See SHINING 3D support.
Check scanner, scan bodies, and setup
Before repairing a mesh, confirm the hardware and workflow are appropriate for the scanner and implant system. Calibration, scan-body compatibility, and seating instructions vary by equipment; follow the current manufacturer protocol rather than transferring settings from another system.
For the ITI-described extra-oral workflow
The ITI guide describes placing compatible photogrammetry scan bodies on all implants, hand-tightening them, and calibrating the device with its calibration device according to the manufacturer’s protocol. It describes capturing images from multiple angles and gives a working distance of 25 to 30 cm for the iCAM4D or PIC workflows covered in that guide. That distance is specific to those systems, not a general setting for dental photogrammetry. Read the ITI workflow guide and the device’s current instructions.
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For SHINING 3D’s intraoral workflow
SHINING 3D distinguishes coded scan bodies, used to locate implant positions and directions, from cap scan bodies used for soft-tissue capture in immediate cases. Its documented workflow requires Aoralscan Elite series devices. The manufacturer recommends replacing coded or cap scan bodies within 300 uses; the publication date for that IntraoralScan 3.5.6 guidance is not stated. These details apply to that manufacturer’s workflow only. See SHINING 3D support.
For SHINING 3D cap scan bodies, confirm the part type and matching kit, and do not mix types. Inspect surfaces and screw structures for contamination or damage. The vendor notes that blood or saliva covering coded features can prevent recognition. Clean or replace parts according to the manufacturer’s instructions before recapturing. The SHINING 3D cap-scan-body instructions describe this workflow.
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Recapture geometry that was missed or obscured
If the software view shows missing coded features or the needed surface is absent from the dataset, return to acquisition. Alignment cannot reconstruct a feature that was never captured, and a filled mesh does not establish that the underlying anatomy was recorded.
Capture coded scan bodies deliberately
For its coded-scan-body workflow, SHINING 3D instructs users to choose the appropriate body length for the corresponding implant, orient coded-body ends toward the palatal or lingual side, and follow the on-screen path to scan the whole structure and then each rod in detail. Where adjacent implants make it difficult to scan every body at once, its instructions describe capturing them in groups. The vendor suggests approximately 10 N·cm tightening torque for this specific product workflow; do not apply that figure to other scan bodies. Follow the current instructions for the exact device and kit. See SHINING 3D coded-scan-body instructions.
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Review the capture before proceeding
- Check whether the full coded geometry is visible in the software, not just the portion that will later be aligned.
- Confirm coded surfaces are clean, undamaged, and seated as directed.
- Check that the IOS includes the tissue contours needed for the case.
- Look for gaps, double images, or overlapping layers that could indicate incomplete or inconsistent acquisition.
The appropriate scan path and capture threshold depend on the scanner and case. 3Shape’s post-processing guidance recommends checking that teeth and restoration areas are fully captured, examining gaps and stitching issues, and rescanning missing data. For the workflow in that guide, 3Shape recommends no more than 2,000–2,500 3D images per single full-jaw scan to reduce post-processing failures; this is vendor-specific guidance, not a universal image limit. See 3Shape’s post-processing guidance.
Use manual alignment when the scans exist but registration fails
Manual alignment is appropriate only when the corresponding data are present and recognizable. Use the documented procedure for the scanner in use; do not move a final combined mesh by eye as a substitute for registration checks.
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SHINING 3D cap-scan-body alignment
For its cap-scan-body workflow, SHINING 3D describes manually selecting three corresponding data groups when automatic alignment fails. Its instructions include a specific “only two cap scanbodies exist” option. The vendor recommends at least three cap scan bodies for alignment while allowing a minimum of two in that workflow. These are system-specific instructions, not general clinical rules. Follow the exact on-screen steps and inspect the resulting overlay or available reslices. See SHINING 3D cap-scan-body instructions.
SHINING 3D coded-body alignment and conversion
For coded scan bodies, SHINING 3D directs users to scan the connection between the coded scan body and gingiva, and offers manual alignment when automatic alignment is wrong. Its documentation says the coded body should be scanned before conversion and marking. Afterward, confirm that the selected manufacturer, implant type, and subtype match the intended components. See SHINING 3D coded-scan-body instructions.
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Check each registration layer in a combined dataset
The ITI-described full-arch workflow links multiple datasets: intraoral scan bodies are aligned to standard library scan bodies, and those are then matched to extra-oral photogrammetry scan bodies. If the final prosthesis dataset is misregistered, inspect each correspondence layer in sequence. A plausible-looking overall overlay does not establish that every implant correspondence is correct. The ITI workflow guide describes this chain.
Independent reader supportYour contribution helps us test, update, and keep practical guides available for everyone.Repair mesh defects only when the required anatomy is captured
Mesh cleanup can address some holes, borders, and isolated scan artifacts. It cannot prove that a clinically important surface was actually acquired. For an implant prosthesis, follow the clinical team’s verification protocol and obtain a new capture when key anatomy or implant geometry is uncertain. The sources cited here do not establish one universal acceptance test.
What 3Shape cleanup tools can address
3Shape Dental System refinement documentation lists options for closing holes, removing scan artifacts smaller than 5 mm, and improving scan borders. These controls are available only for specified order types and imports, so check the software version and order settings. The under-5-mm figure is the threshold for that artifact-removal tool, not a clinical threshold for discarding anatomy. See 3Shape’s refinement guide.
3Shape’s Unite post-processing guidance also recommends trimming excess tissue and artifacts, checking for large gaps, holes, double images, and stitching problems, and trimming overlapping areas. If an area is missing, the guidance is to rescan it rather than rely on cleanup. These are recommendations for the workflow described by 3Shape, not universal settings. See 3Shape’s post-processing guidance.
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Choose the correction that matches the failure
| Problem | Appropriate next step | Important limit |
|---|---|---|
| Important surface or coded feature was not captured, is obscured, or is damaged | Correct setup or part condition, then recapture the affected region. | Mesh filling cannot establish that clinical anatomy or implant geometry was captured. |
| Corresponding data are present, but automatic registration failed | Use the scanner’s documented manual-alignment procedure and inspect its available quality checks. | Alignment steps and minimum scan-body counts are system-specific. |
| Eligible mesh hole, border, or isolated artifact | Use supported cleanup tools, then review the result against the acquired scan. | Tool availability depends on software version, order type, and import; cleanup is not a substitute for missing data. |
| Implant positions and soft-tissue contours are both needed | Use the appropriate EPG and IOS datasets and verify their registration. | EPG alone does not record soft-tissue morphology in the ITI-described workflow. |
No general failure rate for missing surfaces or alignment errors is established by the cited vendor and workflow documentation. Compatibility, calibration, capture settings, and clinical acceptance criteria should be checked for the exact scanner, software version, scan-body kit, and implant system.
Quick Recap
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