Fixed Final - Impact of Prosth on Perio Flashcards
____________ always wins
Biology
What are 8 prosth factors affecting perio health?
Margin placement
Marginal fit
Contour
Pontic
Subgingival debris
Plaque on dental materials
Hypersensitivity to dental materials
Secondary caries
Location is predicated on position of alveolar bone
Biological width
Normal crest measurement
(bone crest to the tissue)
3 mm facially
4.5 mm interproximally
When teeth are lost, the pt can end up with high crest where _______ encroaches on the soft tissue.
If you place a margin in this shallow area where there’s < than 3 mm of tissue btwn the crest of bone and soft tissue, the result is _____________
bone; resorption
The most important factor in post-restorative gingival health and stability is the position of the ___________ relative to the bony crest, not the pre-operative health and/or position of the gingival tissues
margin
65% long term survival
Resin-bonded bridges
90% long term survival
Conventional FDP
What are the 2 main causes for FDP failure?
Caries
Loss of retention
What 2 things can negatively affect the outcomes of FDPs?
Posts
Cores
What was the 20 year FDP survival rate?
66%
Occurrence of a previously reversible complication is a predictive factor for an __________ complication later on
irreversible
A reversible complication within the first _____ years will probably lead to an early irreversible complication
2
What are 6 interactions btwn gingiva and margins?
Biologic width
Margin location
Overhangs
Contours
Proximal contacts
Surgical crown lengthening
What 5 factors should you consider when selecting margin location?
Esthetics
Sulcus anatomy
Crest type (normal, high, low)
Restoration (ferrule effect)
Caries risk/hygiene
Which margin placement?
Caries extend below tissue
Subgingival
Which margin placement?
Old restorations extended into sulcus
Subgingival
Which margin placement?
Prep length for retention + resistance
Subgingival
Which margin placement?
Creating significant contour alterations w/ the restorations
Subgingival
Which margin placement?
Mask discoloration of the root
Subgingival
Which margin placement?
Hide the margin
Subgingival
T/F: In one study, there was no correlation btwn marginal discrepancy and pocket depth
True
A ___________ and significant relationship exists btwn marginal discrepancy and gingival index and btwn marginal discrepancy and crevicular fluid volume (inflammation)
quantitative
Overhangs cause an increase in periodontal ____________
bacteria
