Actual (post-op) vs. Planned Implants in 3D

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Posted on By Salo Kegen In CBCT & CAD/CAM

In case you have a post-op CT, here you have a great way to see and evaluate in 3D the delta between the implants planned and the actual (real) implants positions.

In this link you have a description of the whole process:

- The SIMPLANT .sof file (this is the actual file uploaded to SIMPLANT while ordering a guide)
- A post-op CT in DICOM format (no matter the denture status)

DISCLAIMER: This is not a recommendation to do an extra CT, it is intended for cases a post-op CT was performed anyway for other reasons.

Actual (post-op) vs. Plan

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Interesting information.
Salo, Was your guide ST born or screwed to the bone directly?


This case was a full clearance (all teeth extracted) and bone supported, a fact that may explain the small discrepancies having to implant in the recently created sockets using an Universal SIMPLANT Guide (not a SAFE system). The CT scan was more than 12 months old (something we try not to do). No fixation screws were used. MIS and Adin implants implemented. I added the guide design pictures and cross-sections at the end of the web album.


Very interesting. What have you found about the accuracy of implant guides when comparing them with your post-op CBCT?
thanks Dr. Salama


I'm glad (and honored) you find it interesting. I'm a computer-oriented person (I'm not a dentist neither a dental technician), specialist in SIMPLANT software, DICOM, CAD/CAM. I hear all the time claims that "CT Guidance is not accurate enough compared to manual procedures" (mainly coming from those who do NOT use guidance...). I hope this technique will give a tool to prove guidance is... a good thing to have, but you need to know how to work and be aware of its limitations.


Hi Salo,
I can perfectly understand your point of view about planning and use of surgical stent.
On my opinion a team is needed to work on the project and should involve several competencies.
The 'digital accuracy' is a main skill on planning but not the only one required to achieve an end result that is ultimately clinical.
I'm on the way to show a digital film based on method you describe and it can be useful to refer to your address about software process to obtain it.
By the way, the second X-ray, should be performed using same voexel size and type of machine (Dentascan or CBCT) otherwise matching could not be executed.
I agree with your advice of not using the x-ray method for accuracy revaluation.


Of course I agree with all of your comments, I see myself part of the team you mentioned. It will be very nice to see your film. I'm skegen(at)gmail(dot)com. I added your suggestion to use the same CT scanner and settings to the webalbum. Thanks. --Salo


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