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The sequence of imaging for a CEREC implant crown should be followed carefully. There are certain things that you are trying to achieve in each catalog!
The design phase will take some time. However, a systematic approach will keep you from missing something and show you whether you have to split the case into two parts.
Some more to discuss on Imaging for implants!
The Model Phase is critical to get a good proposal, HOWEVER, don't spend too much time there! It can be trouble!