14: Support_for_distalext. Flashcards
does not have the advantage of total tooth support
DISTAL EXTENSION RPD
DISTAL EXTENSION RPD:
does not have the advantage of __ __ __
total tooth support
DISTAL EXTENSION RPD:
dependent on residual ridge for __ __ and ___
support, stability, and retention
DISTAL EXTENSION RPD:
___ ___ is needed to avoid lifting away from ridge
direct retention
indirect retention
direct resistance
indirect resistance
indirect retention
DISTAL EXTENSION RPD:
patients must be made aware of the ___
outcomes
limitations
consequences
limitations
FACTORS INFLUENCING SUPPORT OF DISTAL EXTENSION BASE:
extent of residual ridge ___ by the denture base
coverage
load
framework
coverage
FACTORS INFLUENCING SUPPORT OF DISTAL EXTENSION BASE:
type and accuracy of the __ __
residual ridge
denture base
impression registration
impression registration
FACTORS INFLUENCING SUPPORT OF DISTAL EXTENSION BASE:
accuracy of the ___ of the denture base
fit
load
coverage
fit
FACTORS INFLUENCING SUPPORT OF DISTAL EXTENSION BASE:
___ of the removable partial denture framework
quality
design
impression
design
FACTORS INFLUENCING SUPPORT OF DISTAL EXTENSION BASE:
total __ __ applied
impression registration
ridge coverage
occlusal load
occlusal load
CONTOUR AND QUALITY OF THE RESIDUAL RIDGE:
Connective Tissue
Contour
Quality
Quality
CONTOUR AND QUALITY OF THE RESIDUAL RIDGE:
Firm
Contour
Quality
Quality
CONTOUR AND QUALITY OF THE RESIDUAL RIDGE:
Dense
Contour
Quality
Quality
CONTOUR AND QUALITY OF THE RESIDUAL RIDGE:
Fibrous
Contour
Quality
Quality
CLASSIFICATION BY ATWOOD’S
Pre-extraction
Order 1,2,3,4,5,6
1
CLASSIFICATION BY ATWOOD’S
Post-extraction
Order 1,2,3,4,5,6
2
CLASSIFICATION BY ATWOOD
High, well-rounded
Order 1,2,3,4,5,6
3
CLASSIFICATION BY ATWOOD’S
Knife-edge
Order 1,2,3,4,5,6
4
CLASSIFICATION BY ATWOOD’S
Low, well-rounded
Order 1,2,3,4,5,6
5
CLASSIFICATION BY ATWOOD’S
Depressed
Order 1,2,3,4,5,6
6
crest of bony mandibular ridge is ___
cancellous
loss of ______ over residual ridge after tooth extraction
firm mucosa
__________ is better suited for primary stress-bearing role
buccal shelf region
labial shelf region
residual ridge
lingual region
buccal shelf region
The tissues covering the ___ of the maxillary residual ridge must be less displaceable than the tissues that cover palatal areas, or relief of ___ ___must be provided in the denture bases or for palatal major connectors.
crest , palatal tissues
The gum on the upper ridge should be ___ than the roof of the mouth. This way, the dentures stay ___.
firmer , stable
EXTENT OF RESIDUAL RIDGE COVERAGE BY THE DENTURE:
the broader the residual ridge coverage, the greater is the distribution of the __, which results in __ __ per unit area
load, less load
TYPE AND ACCURACY OF THE IMPRESSION REGISTRATION:
not supporting occlusal load
Anatomic Form
Functional Form
Anatomic Form
TYPE AND ACCURACY OF THE IMPRESSION REGISTRATION:
supporting load
Anatomic Form
Functional Form
Functional Form
ANATOMIC FORM: 4 impression materials
→ metallic oxide impression paste
→ mercaptan rubber
→ silicone
→ hydrocolloid
ANATOMIC FORM: Distortion & Tissue Displacement
→ ____ of impression material
→ ____ of impression material
confinement, viscosity
ANATOMIC FORM: Purpose
most physiologic form for__ __
denture support
When some pressure is applied-like from biting, pushing with a finger, or using a custom tray–the ridge shape under that load is called the
Functional form
Steffel’s categories of managing distal extension RPDs:
o stress-breakers or resilient equalizers
o physiologic basing
o stress distribution
requirements of distributed stress denture:
o ___-occlusal rests
o __ and __ framework
positive, rigid and nonflexible
requirements of distributed stress denture:
o __ retainers
o ____ and ___ coverage bases
indirect
well-adapted and broad
ACCURACY OF THE FIT OF THE DENTURE BASE:
distal extension is enhanced by close contact of ______ and _____
tissue surface and residual ridge tissue
ACCURACY OF THE FIT OF THE DENTURE BASE :
denture base must be related to the RPD framework as _________ to the abutment teeth when impression was made
basal seat tissues
DESIGN OF THE REMOVABLE PARTIAL DENTURE FRAMEWORK:
the greatest movement takes place at the most _____ of the denture bas
posterior extent
___ and ___ have suggested that moving rotational axis from a disto-occlusal rest to a more anterior location, more of the residual ridge receives vertically directed occlusal forces to support the denture base.
Steffel and Kratochvil
Steifiel and Katrochil
Stephen and Katrochil
Steffel and Kratochvil
Steffel and Kratochvil have suggested that moving rotational axis from a disto-occlusal rest to a more ___ location, more of the residual ridge receives ___ directed occlusal forces to support the denture base.
anterior, vertically
TOTAL OCCLUSAL LOAD APPLIED:
patients with distal extension removable partial dentures generally orient the food bolus over _____
natural teeth rather than prosthetic teeth
posterior teeth rather than natural teeth
natural teeth rather than prosthetic teeth
TOTAL OCCLUSAL LOAD APPLIED:
when the opposing natural teeth are super-erupted, control of eccentric functional contacts and the resultant ____ loads makes chronic discomfort a clinical challenge
horizontal
TOTAL OCCLUSAL LOAD APPLIED :
the reduction of the size of the occlusal table ___ the vertical and horizontal forces that act on the removable partial dentures and lessens the ___ on the abutment teeth and supporting tissues
reduces, stress
9 ANATOMIC FORM IMPRESSION
(1) Anatomic Form Impression
(2) Rest and Base Fit
(3) Load Distribution
(4) Tissue Load Bearing
(5) Load Distribution Importance
(6) One-Stage Impression Risks
(7) Individualized Impression Tray
(8) Reline Considerations
(9) Distribution of Masticatory Load
the objective of any functional impression technique is to provide maximum ___ for the RPD base
retention
rigidity
stability
support
support
FUNCTIONAL IMPRESSION:
to make a good denture, it’s important to know how ___ and ___ for taking impressions work.
medical conditions and skills
material quality and experience
different materials and methods
different materials and methods
FUNCTIONAL IMPRESSION:
no one type of material can perfectly capture both the shape of the teeth and gums at rest and how they actually work when you bite
T or F
T
FUNCTIONAL IMPRESSION:
we need to use a _____to take a corrected impression that shows both how things look and how they function
strategy
second method
backup
second method
METHODS FOR OBTAINING FUNCTIONAL SUPPORT FOR THE DISTAL EXTENSION BASE:
distributes the ___ over a large area as possible
stress
load
load
SELECTIVE TISSUE PLACEMENT IMPRESSION METHOD:
it starts with the understanding that the soft tissues in the mouth can be gently moved or recorded in their _______, and how much they can be displaced without causing harm depends on their reaction to pressure
natural resting state
SELECTIVE TISSUE PLACEMENT IMPRESSION METHOD :
the tissues in the back of the mouth, near the _____, can be slightly pushed down to create a good seal for the upper denture without causing harm
vibrating line
FRAMEWORK FITTING:
the framework fitted to the teeth while ______ is registered provides a means of coordinating both
soft tissue support
FRAMEWORK FITTING :
this means that before the trays are ___, the framework must be ___ in the mouth
attached , fitted
FRAMEWORK FITTING STEPS:
(1) Use of ______ to identify ____ to completely seating the removable partial denture framework.
disclosing media, interferences
FRAMEWORK FITTING STEPS:
(2) Use of disclosing media to identify the ____ of the component parts of the framework during ___ of the framework and when the framework is completely seated in its designated terminal position.
appropriate contact(s), seating
FRAMEWORK FITTING STEPS::
(3) ___ the seated framework to the ___ occlusion.
Adjusting, opposing
FUNCTIONAL IMPRESSION TECHNIQUE:
used when the mucosa of the residual ridge feels ____
uniformly firm
captures the shape and position of the tissue while the patient bites down, simulating the effects of chewing forces
FRAMEWORK FITTING
FUNCTIONAL IMPRESSION TECHNIQUE
FUNCTIONAL IMPRESSION TECHNIQUE
when this technique is applied to firm mucosa that doesn’t easily displace, it results in minimal movement of the prosthesis
FAMEWORK FITTING
FUNCTIONAL IMPRESSION TECHNIQUE
FUNCTIONAL IMPRESSION TECHNIQUE
CONTOUR AND QUALITY OF THE RESIDUAL RIDGE :
Broad
Contour
Quality
Contour
CONTOUR AND QUALITY OF THE RESIDUAL RIDGE:
Rounded
Contour
Quality
Contour
CONTOUR AND QUALITY OF THE RESIDUAL RIDGE:
high vertical slopes
Contour
Quality
Contour
