Prosthodontics: Fixed and Removable Flashcards
7 cards from real AGD practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 7 Prosthodontics: Fixed and Removable flashcards as text
Which cement is most appropriate for final cementation of a metal-ceramic crown on a vital tooth with a short clinical crown?
Answer: Resin-modified glass ionomer
Resin-modified glass ionomer provides superior retention through adhesion and is biocompatible, making it ideal for vital teeth with limited retention form.
A patient presents with a Kennedy Class II partial denture that has significant rocking movement. The most likely cause is:
Answer: Lack of indirect retainers
Indirect retainers placed anterior to the fulcrum line prevent rotational movement of distal-extension partial dentures under occlusal load.
The biologic width in a healthy periodontium averages approximately:
Answer: 2.04 mm
Biologic width comprises the junctional epithelium (~0.97 mm) and connective tissue attachment (~1.07 mm), averaging approximately 2.04 mm total.
When fabricating a complete denture, the vertical dimension of occlusion is best evaluated by:
Answer: Using a combination of methods including physiologic rest position and phonetics
No single method is entirely reliable; combining rest position minus freeway space, phonetic tests, swallowing, and facial aesthetics provides the most accurate VDO.
Which of the following clasp assemblies provides the most favorable stress distribution for a distal-extension removable partial denture?
Answer: RPI (rest, proximal plate, I-bar) clasp system
The RPI system allows the I-bar retainer to disengage and move gingivally under load, reducing torquing forces transmitted to the abutment tooth.
A porcelain-fused-to-metal crown shows a gray discoloration at the gingival margin six months after cementation. The most likely cause is:
Answer: Gingival recession exposing the metal substructure
Gingival recession exposing the metal collar of the PFM crown is the most common cause of grayish discoloration at the gingival margin after cementation.
The primary purpose of a surveyor in removable partial denture design is to:
Answer: Determine the path of insertion and identify usable undercuts
The dental surveyor determines the path of insertion/removal, identifies retentive and non-retentive areas, and locates interferences to the chosen path.