Digital Workflows for Implants and Endo Flashcards
what are the CBCT indications in implant dentistry
- preoperative analysis:
- anatomic analysis
- site development using grafts
- computer assisted treatment planning
- postoperative evaluation:
- diagnosing complications
- verifying implant placement
the intraoral scan is used to create:
the intaglio of an implant guide
the CBCT allows us to:
visualize the hard tissue to plan the proceudre
both our planning software and what we can see in the mouth are extremely accurate but _________ is the most important thing
the correlation between them
what is the most important part of any digital workflow
the alignment between the scan of the mouth and the CBCT
what are the requirements for treatment planning a dentate case
- STL of an intraoral scan
- DICOM volume of the site
what does yellow, red, green, blue and white mean in the scan in a dentate case
- yellow: path of the drill
- red: implants
- green: implant sleeve
- blue: intraoral scan
- white: virtual waxup
what can blue and purple mean in a dentate case
blue- implant
- purple: intraoral scan
since CBCTs only visualize hard tissue, there is no way to align a soft tissue scan. how do we do this?
using a denture that is not very radiopaque
what are fiduciary markers
radiopaque markers and then take 2 CBCTs, one with patient wearing the denture and one of just the denture
the CBCT of the denture is used to create:
the intaglio of the guide because there is high contrast between the denture and the surrounding air (or foam spacer)
what are the requirements for treatment planning an edentulous case
- DICOM of the denture with radiographic indicators
- DICOM volume of the site with the patient wearing the denture with indicators
what does yellow, blue, green , white, red mean in an edentulous case
- yellow: path of the drill
- blue: implant or fixation pin
- green: implant sleeve or fixation pin sleeve
- white: surgical guide
- red: implant
what are the CBCT indications in endo
- preoperative analysis: complex surgical cases, assessment of root canal anatomy, proximity of apex to anatomical structures
- postoperative evaluation: documenting success of treatment, evaluating healing
what is required for a calcified root canal in endo treatment planning
- STL of an intraoral scan
- DICOM volume of the site
how do you use the CBCT to identify the canal
find the slice of the calcified canal to be able to measure the depth and angulation needed for the access
how do you use CBCT for planning the access
utilized the pilot drill to identify the angulation and depth to access the remaining canal
- the light blue sleeve needs proper clearance from the incisal edge
it is vital to analyze the access from all angles to ensure:
the access path is lined up from every angle
in the conventional workflow, we would do what to restore the implant?
take an impression of the implant
if we want to use a digital workflow, we need to:
capture the location of the implant
what are scan bodies for
designed for the specific implants and used similar to impression copings for single implants
many studies have shown _________ with intraoral scanning for single implants
acceptable accuracy
what are the limitations of scan bodies
with full arch prosthesis, intraoral scanning studies have shown marginal discrepancies greater than 150micrometers, which ultimately lead to future complications
what are photogrammetry scan bodies
- specific to each photogrammetry system and are encoded with targets that allow the camera to transpose multiple images to determine the exact implant position
