Operative II-E1:Gold Onlays Flashcards
Tx Plan-Advantage for Gold: Less tooth ______ than a crown, Protects the _____ of the tooth, and the WEAR rate is similar to ______
removed..cusps…enamel
Tx Plan-DISAdvantage for Gold: Relies on sound tooth structure for _______
retention
Tx Plan-Advantage for Gold: IT SHOULD NOT OPPOSE WHAT MATERIAL? (beeee specific)
FELDSPATHIC ceramic!!
Gold Options: Which option has the least amount of tooth removed?
an INLAY
Gold Options: What type of prep is THE MOST PROTECTIVE OF ALL RESTORATIONS?
Crowns!
Gold Options: Which prep has less tooth removed than a crown AND protects cusps?
an ONLAY
Gold options: Which prep relies on sound tooth structure for retention?
an ONLAY
Gold Option: Which prep relies on tooth strength to retain and DOES NOT protect cusps?
an INLAY
Gold Option: Which prep removes the most tooth structure and should not oppose feldspathic ceramic?
a CROWN
Whats the difference? What prep is an intra-coronal restoration?
inlay
Whats the difference? What prep is an extra-coronal restoration?
onlay
Whats the difference? What prep is used when cusps are missing and the tooth needs PROTECTION?
onlay
Whats the difference? What prep is used only when significant tooth structure remains?
Inlay
Whats the difference? What prep does NOT procect the tooth?
Inlay
Gold ______ Restoration: One or more of the cusps of a tooth and is designed to strengthen a tooth that has been weakened by caries or previous fillings.
Onlay
An ONLAY Covers the _______ surface of at least all portions of the tooth involved in occlusal function
occlusal
An ______ prep Includes all areas of caries, fracture, and defects
onlay
5 indications for Gold Onlays: 1) _____ tooth with incomplete tooth _______ that are limited to the coronal tooth structure
VITAL…FRACTURES
5 indications for Gold Onlays: 2) Large restorations where the _______ is wide and/or deep
ISTHMUS
5 indications for Gold Onlays: 3) Areas where the cusps are too ______
THIN
5 indications for Gold Onlays: 4) Large restorations that are ________ and involve cusps
FRACTURED
5 indications for Gold Onlays: 5) Patients with _________ type occlusion
group function
5 CONTRAindications for Gold Onlays: 1)Patients that have what occlusial pathology?
BRUXISM
5 CONTRAindications for Gold Onlays: 2) Areas in the _______ zone
aesthetic zone
5 CONTRAindications for Gold Onlays: 3) Teeth that oppose _______ restorations
feldspathic ceramic
5 CONTRAindications for Gold Onlays: 4) Which group of teeth?
2nd molars (high occ loading
5 CONTRAindications for Gold Onlays: 5) _________ treated teeth, they are brittle
ENDODONTICALLY
An Onlay is a _________ partial crown
conservative
Onlay: Less chance of _______ pathology since less tooth is removed
pulpal
______-gingival margins of onlays promote gingival health
supra-gingival margins
Onlay preps need to allow for _______ to evaluate fit before cementing
insertion
All internal line angles should be _______ and the margins should be ________
rounded….supra-gingival
Guess what??! Gold can be _______ than ceramic, so its more CONSERVATIVE!
thinner
How much clearance, Clarance do we need on the NON-functional cusp?
greater than or equal to 1.0mm
How much clearance, Clarance do we need on the Fxn cusp?
greater than or equal to 1.5mm
Gold is dimensionally stringer than ______ or _______
ceramic or amalgam
COOL for an onlay, our margin profile may be thinner, like the angle of departure can be
less than 90 degrees
Also for an onlay the isthmus can be ______ compared to ceramic or amalgam.
narrower
When the functional cusp or tooth is weak or the isthmus is deep, we’ll ______ or cover the functional cusp. It should be ____mm deep
Hood…1.0mm deep
Gold is ______ against the margins during delivery for better adaptation.
burnished
Gold is ________ to the tooth, therefore it is retained by _______
cemented…friction
Gold preps require ___ degrees of taper
6 degrees
How big is the marginal gap for cement?
35-50 microns
If we want to increase retention for an only prep, adding slots/troughs should be _______
divergent
________: An extracoronal extension onto the FACIAL or LINGUAL surface just past the proximal line angle of the tooth..Increases retention & resistance
Skirting