Successful Dentures Part II - Removable Prosthodontics

Implant Supported Overdentures
Studies of several populations have shown that ratings of
quality of life are significantly higher for patients who
receive 2-implant mandibular overdentures opposing
complete maxillary conventional dentures than for those
with conventional dentures.
People who receive mandibular 2-implant overdentures
modify their diets which improves their nutritional state.
Such improvements may have a strong positive impact on
general health, particularly for senior adults who are
vulnerable to malnutrition.
2-implant overdenture are becoming the first choice of
treatment for the edentulous mandible.
Overdenture Attachments
Ball attachments
Ball and rubber o-rings and/or metal housings
Used to be the attachment of choice
Wear quickly, not as retentive
Overdenture Attachments
Overdenture Attachments
Bar Attachments
1-3 bars with 1-3 clips
Retentive at first, get loose or break over time.
Hard to adjust and fix
Not as popular anymore
Locator
Lowest vertical height of 3.17mm.
Self aligning
Durable
Up to 40° angle correction
Retention flexibility
Overdenture Attachments
Fixed Full-arch Restorations
Can also have a bar with locators cast or tapped into the framework.
Usually have 3 - 4 locators incorporated.
Framework can be gold (cast) or titanium (milled).
Framework must be passively attached to the implants.
Returns the bite-force of the edentulous to approximately 80% of natural
teeth.
Implant supported and retained.
Returns the bite-force of the edentulous pt close to natural teeth
Must have enough space for restoration, minimum of 10mm.
Framework can be gold (cast), titanium or zirconia (milled).
Prosthesis can be metal-ceramic, or metal-acrylic.
Framework must be passive.
Patient must be able to clean underneath framework
Implant supported and retained.