Oct 3 McGlumphy Lecture Flashcards
What are some challenges and co-morbidities of restoring edentulous patients with implants?
Not having enough vertical space after placing implants is something you can’t fix
Patients may not like it (esp. young ones)
Teeth may not be happy with it
Patients who have just lost their teeth have a lot of bone, so make sure you have enough vertical space for an overdenture
What are two types of removable implant prostheses?
Implant and tissue overdenture
Bar and clip overdenture
What are the two types of fixed implant prostheses?
Fixed metal/resin hybrid
Fixed PFM or Zirconia restoration
What is the role of digital technology in prostheses fabricaiton?
Can be used to make surgical stents
Can be used if you think you may need bone grafts to see if you have enough bone
Help plan restorations
Scan impression
What are the restorative options for rehab of the edentulous mandible?
4 implants minimum
Overdenture
Fixed crown and bridge over implants
What are the restorative options for rehab of the edentulous maxilla?
Basically the same as the mandible, but we can place more implants posteriorly because we don’t have to worry about the IAN
What are the advantages and disadvantages for a locator over denture?
Maintenance is a trap
It’s not nearly as good as the patient’s original 8 periodontally involved teeth
It’s tissue supported, so it will have to be relined like a normal denture
What is the ideal location for implant placement for a mandibular hybrid restoration?
At least 4 implants
At least 5mm in front of mandibular foramen
You can place them so they patient has room for 2 more implants if they end up wanting more
Must be parallel
How much vertical space is needed for a mandibular hybrid restoraiton?
15-18 mm top of the alveolar crest/implant to the top of the prosthesis
18 mm from the top of the ridge to occlusal plane or incisal edge
This will give you enough room for any of these prostheses
What is the importance of a passive fit of a metal framework?
Don’t want to loosen or break screws, abutment, or restoraitons
How is the passive fit of a framework clinically determined?
“One screw test”
-screw one screw tight and see if the whole thing fits well by checking for gaps at the margins
How is the AP distance (“A-P Spread”) measured?
Distance from the middle of the most anterior implant to the middle of the most posterior implant
How is the cantilever length determined for a mandibular hybrid prosthesis?
7mm implant = 1 x A-P spread
15mm implant = 2 x A-P spread
18mm implant = 2.7 x A-P spread
20mm implant = 3 x A-P spread
T/F - Never break the cantilever length rule
False - there are times where you want to break it, esp with an upper denture
T/F - Force generated by an upper denture isn’t nearly as much generated by fixed
True
