Problem: Not able to Remesh/Clean up the scan within the Prepare workflow
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Solution: Check Mid-Patellar Tendon (MPT) and Distal Tibia (DT) Markers and Alignment
The first time you go through the Prepare workflow with a scan, it must have Mid-Patellar Tendon and Distal Tibia markers placed and be aligned in order to successfully remesh/clean up the scan.
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Solution: Check Mid-Patellar Tendon (MPT) and Distal Tibia (DT) Markers Position
Go back to the Landmarks stage (Top Image below) and check that your MPT and DT markers are on the anterior face of your scan and where you expect them to be. If a Landmark menu is open then when you click on your scan the Landmark position will change. You will need to click the DT menu at the left of the screen before clicking to place your DT marker on your scan, otherwise you will be moving the MPT marker.
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Solution: Check for small holes at physical marker positions/where you wish to place MPT or DT markers
Go back to the Landmarks stage (Top Image below) and check that your MPT and DT markers are on the anterior face of your scan and where you expect them to be. Check there are no small holes where you are trying to place your MPT or DT markers. This could be more likely with physical markers if they have not been fully picked up by the scanner. If there are holes positioning a marker at this point may actually have placed them on the posterior surface causing misalignment.
If you do have small holes position your markers near where there are no holes, auto align and then Remesh once to close the holes. Then you will be able to return to the Landmarks stage to position your MPT and DT landmarks.
Within the Prepare workflow you are able to go back and forth multiple times between Landmarks, Align and Remesh.
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Solution: Check for small holes at the distal end of the scan
Check there are no small holes at the distal end of your scan. This could be more likely with scanning over a pin lock if it has not been fully picked up by the scanner. If there are holes at the distal end of your scan it could cause misalignment after using manual alignment tools.
If you do have holes at the distal end just use the auto align and then Remesh once to close the holes. Then you will be able to return to the Alignment stage to manually adjust as you wish. You do not have to remesh again and from here can just go straight to the Fit or Modify workflow.
Problem: Mouse Controls
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Mouse Controls
Rotate: Right-Click + Drag
Zoom: Mouse Scroll Up or Down
Pan: Ctrl + Right-Click + Drag
Brush Strokes: Left-Click + Drag
Move Marker: Left-Click + Drag
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Track Pad
Rotate: Right-Click + Drag
Zoom: Two-Finger Click + Drag Up or Down
Pan: Ctrl + Right-Click + Drag
Brush Strokes: Left-Click + Drag
Move Marker: Left-Click + Drag
Problem: Tool is not resetting
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Solution: Refresh the page.
Refresh the internet browser you are working on.
Problem: Seems to be Slow
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Solution: File size of the uploaded scan
We would expect a file size of an uploaded lower limb scan to be somewhere between 1MB and 10MB. If your file size is larger than this it may be affecting the speed you are experiencing. Try reducing the resolution of your scans.
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Solution: Hardware Acceleration not turned on, slowing 3D graphics
Whilst this should be enabled by default in your browser, it may have been turned off accidentally which causes the 3D graphics to be slow.
On Edge to enable this feature, go to: edge://settings/system/manageSystem and ensure Hardware Acceleration is toggled on.
Problem: Scaling after Upload
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Solution: Units need to be in mm
riiForm reads the scan in mm. If the units of the scan are not in mm it could cause issues with scaling of the scan. Check that the units of the scan are in mm before uploading.
Problem: Fit Workflow Failing
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Solution: Elongate the proximal end of the scan
The Fit workflow will look at the medial and lateral condyle areas for potential rectification suggestions. If there is insufficient distance above the MPT for this then it will currently fail. The proximal end of a prepared scan can be elongated within the Prepare workflow. You can go back into the Prepare workflow multiple times by selecting continue prepare from the dashboard (Top image below). Go to the Remesh stage and use the Extend Mesh Height Above MPT adjustment slide bar to extend the proximal end of your scan (Bottom image below). In order for the Fit workflow to have enough space proximally you will want a minimum of around 100 mm from your MPT to the top of your scan.
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Solution: MPT through the axis
The MPT landmark needs to line up on the axis. Auto-align does this as part of the alignment. To check, toggle on the axis utility tool and verify the axis goes through the MPT landmark.
Problem: Cannot see Design History in Fit Workflow
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Solution: Check alignment of scan
If you cannot see the design history after making adjustments within Fit then your scan may not be aligned correctly. You should check for any error messages and return to the dashboard to continue prepare and check alignment.
Problem: Buttons at bottom of Modify workflow are inactive and unusable
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Solution: Check alignment of scan
If when in modify workflow, after implementing modifications, you can’t see the buttons for the next workflows as active, then your scan may not be aligned correctly. You should check for any error messages and return to the dashboard to continue prepare and check alignment.
Problem: Anatomical Views are Incorrect
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Go back to Alignment to align the scan. Once aligned, the anatomical view will be corrected.
Problem: Tools are not working due to browser cache
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The browser caches files for performance automatically. Sometimes when the website is updated, not all files are updated on the browser. When this happens you must perform a hard refresh. This is like refreshing the page, except it clears cached items as well.
Problem: Trimline rough/cut off on the medial and lateral wings
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Solution: Trimlines need to be at least 10mm lower than the top of the scan
If you are finding rough/cut off trimlines at the medial or lateral wings of your socket design try moving the trimline lower at these points. If you require more space you can extend the mesh height within the Remesh stage of the Prepare workflow:
