L1 Intro to Removable Pros Flashcards
What is support?
The foundation area on which a dental prosthesis rests, or to hold up and serve as a foundation.
What is stability?
The quality a prosthesis to be firm, steady, or constant, to resist displacement by functional horizontal or rotational stresses.
What is retention?
The quality inherent in the prosthesis acting to resist the forces of dislodgment along the path of placement.
Surveying is…..
An analysis and comparison of the prominence of intramural contours associated with the fabrication of a prosthesis.
HOC
A line encircling a tooth and designating its greatest circumference at a selected axial position determined by a dental surveyor.
Undercut
The portion of the surface of an object that is below the HOC in relationship to the path of placement.
Why must the muscle and frenal attachments be measured in IOE?
Buccal frenulum and its distance from the buccal FGM must be noted to determine if an infrabulge clasp might be possible on an abutment tooth.
Mandibular lingual frenulum extent and distance from the FGM of remaining teeth must be measured intramurally to determine the placement and type of the major connector that may be used.
Also the vestibular depth and soft tissue undercuts should e evaluated in IOE.
What is the only way to accurately assess the overlap of potential abutment teeth?
Diagnostic casts mounted on an articulator with correct occlusal relationship is the only way to accurately asses this relationship.
The clinical examination consists of what exams?
EOE, IOE, Radiographic examination
What is the appropriate radiograph series for treatment planning?
FMX OR pan + PA x rays of remaining teeth
What is looked for during radiographic examination?
Crown to root ratio
Lamina dura
Root morphology
Pathology/abnormalities
What kind of tooth is ideal when viewing it radiographically?
Long broad root coupled with an excellent crown-root ratio makes it a favorable RPD abutment
Classification of RPDs…
Biomechanical –> based on nature of supporting tissues
Kennedy Classification –> locations and number of edentulous areas
ACP based on location/extent of edentulous areas, condition of abutment teeth, occlusal scheme, residual ridge, and conditions creating a guarded prognosis.
What are Kennedy class 1-4?
- Class 1: bilateral edentulous areas located posterior to the remaining natural teeth
- Class 2: A unilateral edentulous area located posterior to the remaining natural teeth.
- Class 3: Unilateral edentulous area with natural teeth remaining both anterior and posterior to it.
- Class 4: single but bilateral (crosses midline) edentulous area located anterior to the remaining natural teeth
What are the ACP classifications?
1 –> Ideal or minimally compromised
2 –> moderately
3 –> substantially
4 –> severely