Intro to RPD Flashcards
CD:
Complete denture
RPD:
Removable partial denture
What are the two types of removable prostheses?
- CD
- RPD
What is represented by the red line in this image?
Major connector
Component that connects the RPD on one side to the RPD on the other side:
Major connector
In order for the RPD to not be considered a choking hazard, it must:
Have a major connector & go across arch
PRPD:
Partial removable dental prosthesis
CRDP:
Complete removable dental prosthesis
What are the three types of RPDs?
- Cast metal frame RPD
- Acrylic RPD
- Flexible base RPD
What type of RPD is represented in the image below:
Cast metal frame
What type of RPD is represented in the image below:
Acrylic
What type of RPD is represented in the image below:
Flexible base
A flexible base RPD may be referred to their trade name:
Valplast
What are two issues seen with a flexible base RPD?
- They flex
- Difficult to adjust
What are the two common materials used for cast metal RPDs?
- CoCr (cobalt-chromium)
- NiCr (nickel-chromium)
Why is CoCr used more often then NiCr?
Nickel allergies/sensitivities
The classification system used for RPDs:
Kennedy Classification
What Kennedy Classification is represented in the image below?
Class I
What Kennedy Classification is represented in the image below?
Class II
What Kennedy Classification is represented in the image below?
Class III
What Kennedy Classification is represented in the image below?
Class IV
Class of RPD characterized by B/L distal extension areas:
Kennedy Class I
Kennedy Class I RPDs replace:
Posterior teeth on BOTH sides
Class of RPD characterized by a single distal extension area:
Kennedy Class II
Kennedy Class II RPDs replace:
Posterior teeth on ONE side
Class of RPD characterized by an edentulous area that is tooth bound (no distal extensions):
Kennedy Class III
Class of RPD characterized by missing anterior teeth with an extension in the anterior that crosses the midline:
Kennedy Class IV
This image represents Kennedy Class:
II
What RPD component is circled in red in the following image:
Clasp Assemblies
The cast portion of the RPD that goes across arch:
Major connector
What is the red line indicating in the following image:
Major connector
In a typical clasp assembly we have two clasps referred to as:
- Retentive clasp
- Reciprocal clasp
The clasp on the facial/buccal side of the abutment tooth:
Retentive clasp
The clasp on the lingual side of the abutment tooth:
Reciprocal clasp
An element that prevents the RPD from sinking in towards the gingiva when the patient bites down:
Rest
Principle stating the clasp assembly needs to “wrap around” the tooth:
Principle of Encirclement
What type of material is most commonly used for RPDs made in UMKC?
CoCr
What is this called?
Major connector
The art or science of replacing absent body parts:
Prosthetics
Any artificial part:
Prosthesis
Branch of dentistry that pertains to replacement of missing teeth and oral tissues:
Prosthodontics
What are the three different divisions of prosthodontics?
- Fixed prosthodontics
- Removable prosthodontics
- Maxillofacial prosthodontics
What branch of prosthodontics would be ensued in the following example:
A patient presents with cancer in the upper arch in the molar region, that is resected by a surgeon that leaves a hole in the tissue/bone of the maxilla:
Maxillofacial prosthodontics
What branch of prosthodontics would be ensued in the following example:
A patient presents with a cleft palates, resulting in a hole in the upper palate:
Maxillofacial prosthodontics
Artificial replacement of one or more teeth and/or associated structures:
Dental prosthesis
Prosthesis replacing teeth in partially dentate arch- NOT designed to be removed by patient:
Fixed partial denture (FPD)
FPD:
Fixed partial denture
Is a hybrid implant restoration considered a FPD or a RPD? Explain:
FPD; only the dentist can remove the prosthesis- the patient cannot remove it themselves
Prosthesis replacing teeth in partially dentate arch designed to be removed by the patient:
Removable partial denture (RPD)
When you have a dental prosthesis that can be removed by the dentist, but not by the patient this is considered a:
FPD
Tooth used to support prosthesis:
Abutment
Residual bone & soft tissue covering that remains after tooth loss:
Residual (edentulous) ridge
What may serve as part of support for certain types of RPD:
Residual (edentulous) ridge
What are the teeth with the clasp assemblies around them considered?
Abutment teeth
Maxillomandibular relationship in which the condyles articulate with the thinnest avascular portion of their respective disks with the complex in the anterior-superior position against the slope of the articular eminence:
Centric relation
Centric relation is the maxillomandibular relationship in which the condyles articular with the thinner avascular portion of their respective disks with the complex in the ________ position against the slope of the articular eminence:
Anterior-superior
CR is ______ of tooth contact
Independent
CR position is restricted to:
Purely rotational motion
The relationship of the condyle & disc in relation to the slope of the articular eminence; independent of tooth position:
Centric relation
What do we mean when we say CR position is restricted to purely rotational motion?
The mandible will be ONLY rotating around the condyle
Position with complete intercuspation of opposing teeth; independent of condylar position:
Maximal intercuspal position (MIP)
Maximal intercuspal position (MIP) is ____ of condylar position:
Independent
The point of tooth contact when a patient is in CR position:
Centric occlusion (CO)
What position is seen in the following image?
MIP
A reproduction for demonstration, accuracy NOT implied:
Model
An accurate positive reproduction of the maxillary or mandibular arch:
Cast
Cast for the purposed of diagnosis & treatment planning:
Diagnostic cast
Replica of the teeth, residual ridges, & other parts of the dental arch used to FABRICATE dental restoration or prosthesis:
Master cast
RPD that depends entirely on natural teeth for support:
Tooth-supported RPD
Why are there not tissue-only-supported RPDs?
Because this would be a CD
-RPD supported and retained by teeth at ONLY one end
-Denture base is supported by teeth AND the residual ridge
Tooth-tissue supported RPD
What type of Kennedy Classification is seen in the following RPD?
Kennedy Class III
Also called an “extension based RPD”:
Tooth-tissue RPD
What type of Kennedy Classification is seen in the following RPD?
Kennedy Class I
(distal extension on both sides)
Label the following as acceptable or not acceptable language of prosthodontics:
- Upper
- Take a bite
- Make an interocclusal record
- Lower
- Maxillary
- Mandibular
- Make an impression
- Plate
- Prosthesis
- Take an impression
- Appliance
- Denture
- NA
- NA
- A
- NA
- A
- A
- A
- NA
- A
- NA
- NA
- A
Instead of saying “upper” or “lower” you should say:
Maxillary & mandibular
Instead of “plate” you should say:
Denture
Instead of “appliance” you should say:
Prosthesis
Instead of “take an impression” you should say:
Make an impression
Instead of “take a bite” you should say:
Make an interocclusal record
Label the following as acceptable or not acceptable language of prosthodontics:
- Model
- Interim/Provisional RPD
- Enameloplasty
- Dimple
- Saddle
- Flipper
- Base
- Temporary RPD
- Cast
- NA
- A
- A
- NA
- NA
- NA
- A
- NA
- A
Instead of “model” you should say:
Cast
Instead of “saddle” you should say:
Base
Instead of “dimple” you should say:
Enameloplasty
Instead of “temporary RPD” or “Flipper” you should say:
Interim/provisional RPD
What are the indications for RPDs? (7)
- Edentulous area(s) too long or numerous for a fixed prosthesis
- Need to restore lost soft & hard alveolar tissue (especially in the anterior region)
- Reduced periodontal support of remaining teeth
- Need to distribute masticatory stresses across the dental arch (cross-arch stabilization)
- No posterior abutment tooth
- Immediate replacement of teeth
- Attitude & desires of patient (economic considerations)
Edentulous area(s) too _____ or ____ for fixed prosthesis indicate the use of an RPD:i
Long or numerous
The need to restore lost ____ and ____ ____ tissue (especially in the anterior region) indicate the use of an RPD:
soft & hard alveolar
Reduced ____ of remaining teeth indicate the use of an RPD:
periodontal support
The need to distribute _____ across the dental arch (cross arch stabilization) indicate the use of an RPD:
Masticatory forces
In the case of no _____ _____ _____ indicate the use of an RPD:
posterior abutment tooth
Immediate _____ of teeth indicate the use of an RPD:
Replacement
____ & ____ of of patient (especially economic considerations) indicate the use of an RPD
Attitude & desires
What are the disadvantages of RPDs? (5)
- Removable (not considered ‘part’ of the patient)
- May be lost or broken
- Clasps may be visible (less aesthetic)
- May dislodge during function
- May trap food while eating