Ant. Fixed Dental prosthesis and Delivery of fixed dental pros Flashcards
what is a fixed dental Prosthesis
Any dental prosthesis that is luted, screwed or mechanically attached or otherwise securely retained to natural teeth, roots, or dental implant abutments that furnish the primary support for dental pros
how many teeth may be included in a fixed Dental Prosthesis
1-16 teeth in each art
what is framework
the metallic/ceramix component that is included within the fixed dental prosthesis
what is the “floating” tooth(s) found in a FPD
pontic
where is the Pontic resting in an FPD when placed in the MOuth
The edentulous Ridge
what is an abutment
The part of a structure that directly receives thrust/pressure
what does an abutment anchor to
tooth
portion of tooth
portion of dental implant that serves to support/retain a prosthesis
what is a retainer
Any type of device used for the stabilization or retnetion of a prosthesis
what is a pontic
An artifical tooth on a fixed dental prosthesis that replaces a missing natural tooth
what does a Pontic do ideally
Restors function
where does a pontic find itself
in the space previously occupied by the clinical crown
how do you prep a tooth for an FPD
same as single tooth preparation with a common path of withdraw
what are the bio considerations for an FPD preparation
Preventing damage
Conserve tooth structure
Considerations affecting future dental health
what should you avoid to damage when preparing a tooth
Adjacent teeth
Soft tissues
pulp: temp, chemical action, bacterial action
what should be the mechanical considerations for an FPD prep
PRoviding retention form
Providing resistance form
Preventing deformation of the restoration
does crown type choice mater for esthetics
yes, all ceramic and metal ceramic
how can you change a prep to conserve tooth structure
Partial coverage rather than complete coverage restorations
what normal practices are done to conserve tooth
- Preparation of teeth with the minimum practical convergence angle between axial walls
- prep occlusal surfaces to follow anatomic planes and get uniform thickness
- prep axial surfaces so that a maximal thickness of residual tooth structure surrounding pulpal tissue is retained
how should you select margin geometry?
Conservative and compatible with the other principles of tooth preparation
where should the margin be placed
Where ever to avoid unecessary apical extension of the prep
how should the margin geometry be designed to increase ease
- ease of prep w/o over-extension or unsupported enamel
- ease of identification in the impression and on the die
- distinct boundary to which the wax pattern can be finished
what is the casting and porcelain margin adaptation
Casting: 10 micrometers
Porcelain: 50 micrometers
what is the problem with rough, irregular, or stepped junction
Greatly increase overall margin length and reduce the adaptation accuracy of the restoration
benefit of Supragingival margin
Easy to finish without soft tissue trauma
More easy to keep plaque free
Easier impression
easier evaluation of restorations
what the problem with subgingival margins
Dental caries
Cervical erostion
root sensitivity
where do proximal contact areas extend in subgingival margin
Extend to the gingival crest
what extra does a subginval margin need to support restoration
Additional retention and resistance needed
what type of margin is usually done for an FPD
subginvial
what is the major benifit of Subgingival margin
Esthetic as fuck
how large is biologic width
2mm
what is the biolotic width mdae of
Junction epithelium
Connective tissue attachment
where should retraction cord be placed
below the margin without destroying the attached gingiva connection
what can you do to see the biologic width
use retraction cord within the sulcus
what is the workflow of a FPD
Diagnosis treatment planning and patient approval Tooth prep based on plan Provisional and patient aproval Definitive restoration try in and patient approval Delivery and patient signature
why do we do diagnostic casts
use opposing casts for fixed restorations
Fabrication of provisions
Fab of custom trays
why do we mount our diagnostic casts
Learn occlusal plane Learn interarch clearance Treatment position (CR or MIP) Change in VDO Occlusal analysis - AP slide - Anterior guidance Esthetic analysis
how should the condylar inclination be set up
Protrusive record of patient
Loosen condylar component
Place the protrusive record between casts
set condylar guidance
what is the correct condylar inclination
30 degrees
what is the correct incisal pin
0 degrees
why would diagnositc tooth preparations be indicated
Rotated
tipped
extruded teeth
what must be done before crown lengthening
Gingival finish line
why do a diagnostic waxup
- establish more physiologic, esthetic morpholy
- organize and blueprint and occlusal scheme
- make ESF for provisional restoration construction and tooth preparation
what does luted mean
Cemented
do we do partial preps or full preps now a days
we do full preps(partial is the old school way of doing it)
what does connector thickness depend on
Depends on material
space between teeth
what happens if you violate biologic width
Will be inflammed for ever
what do we use for ESF in lab
Polypropylene (more cloudy than polyethylene)
