Intro to Occlusion/Articulators Flashcards
What are the different types of restorative materials for teeth? (5)
- DENTAL AMALGAM
- COMPOSITE MATERIALS
- GOLD RESTORATIONS (GOLD FOIL)
- GOLD CASTINGS (INLAYS, ONLAYS, CROWNS)
- CERAMICS (CROWNS, BRIDGES–FPD, VENEERS)
The following are the concerns with______ as a restorative material:
- poor esthetics
- weakening of tooth from removal of tooth structure
- recurrent caries
- no adhesive bonding
- sensitivity of properties to manipulation
- brittle nature
- biocompatibility (not a concern most of the time)
- wastewater pollution with mercury
dental amalgam
What are the advantages of dental composite?
- aesthetics (tooth-colored)
- bonding to tooth structure (strengthens structure)
- more conservative in preparation of tooth
- less expensive than ceramic
- reduced mercury exposure
What are the disadvantages of composite?
- composite shrinks (secondary caries)
- durability (may not last as long as amalgam)
- chipping
- more skill and training
- needs to be completely dry
- takes longer
What does bonding allow the dentist to do with composite?
change shape, color, and contours of teeth
What is the oldest type of filling material available?
gold foil
What is the benefit of gold foil?
- can last the lifetime of patient
- can be placed in one visit in small cavities and will last longer than any other material
What is the disadvantages of gold foil?
- gold is expensive
- potentially not esthetic
How long will PFM crowns last?
Depends on the study!
- 95% success rate between 5-10 years
- 97.5% success rate at 7 years
- 95.5% success rate at 7 years
(aka 90+% if done well)
What are the options for tooth replacement?
- complete dentures (with implants)
- partial dentures (with implants)
- fixed bridges and single teeth (with implants)
What are the advantages of high strength ceramics?
- broad range of indications
- excellent clinical performance
- accepted metal alternative*
- less tooth reduction required*
- thinner coping thickness*
- shading coping options*
mechanical device that simulates mandibular movements of condyles in their fossae
articulator
What are the 4 uses of an articulator?
- diagnosis
- treatment planning
- communicate with patients/patient education (help see/understand)
- fabrication of prostheses/restorations
What are the components of an articulator? (5)
- upper member
- lower member
- anterior or incisal pin
- condylar mechanisms
- mounting ring (guide and retention system)
(the features of a ____ articulator)
- allow only opening/closing movements
- can be used for single posterior* restorations
- can create a change in closure angle (the final restoration will present premature contacts!)
non adjustable/”hinge” articulators
What are the features of semi-adjustable articulators?
- articulators used the most
- allow opening and closing movement as well as excursive (lateral) and protrusive movements
What are the types of semi-adjustable articulators?
Arcon
- condyles in lower member
- condylar inclination in the upper member
Non Arcon
- condyles on upper membrane
- condylar inclination on the lower member
- condyles in lower member
- condylar inclination in the upper member
Arcon (semi-adjustable articulators)
- condyles on upper membrane
- condylar inclination on the lower member
Non Arcon (semi-adjustable articulators)
What type of articulator is ours?
Arcon Articulator (a type of semi adjustable)
What is the transverse horizontal axis (terminal hinge axis)?
Where is it on a human–specific locations w/ measurements
- imaginary axis which passes through each of the mandibular condyles
-about 8 mm under the soft tissues in front of the tragus (on each side of face)
it is around this axis that pure rotational movement of condyles occurs
transverse horizontal axis (terminal hinge axis)
(facebow) Usually the anatomic references are the ____ and one other selected anterior point
mandibular condyles transverse horizontal axis
Name the plane associated with the Orbitale-tragion horizontal line
Frankfort horizontal plane
(orb– lower margin of eye socket, tragion–notch above tragus of ear/upper margin of zygomatic bone at that point
