Fixed Dental Prosethesis Flashcards
What are the types of fixed partial prostheses?
Tooth supported bridework
Implant supported bridgework
What are the biological principles of tooth preparation?
Conservation of tooth
structure
Avoidance of
overcontouring
Supragingival margins
Harmonious occlusion
Protection against
tooth fracture
What are the mechanical principles of tooth preparation?
Retention form
Resistance form
Deformation
What are the aesthetic principles of tooth preparation?
Minimum display of metal
Maximum thickness of porcelain
Porcelain occlusal surfaces
Subgingival margins
Which direction should the axis of bridge abutments be prepped?
They should all be parallel
What is the function of retainers?
Give stability and retention to the dental bridge
What is the function of a pontic?
Artificial tooth that replaces a missing natural tooth
Suspended: tooth supported
Restore aesthetic and function
Prevent tilting and drifting of adjacent teeth and supraeruption of opposing teeth
What are the design parameters of pontics?
Height and width of the residual ridge
Dimensions of the edentate space
Shape and texture of the soft tissues
Comfort and support the adjacent tissues
Aesthetic requirements
Access for oral hygiene
What are the classifications of pontics?
Saddle/ridge lap (concave around tissue)
Modified ridge lap (High aesthetic)
Conical (bullet-shaped, egg-shaped)
Ovate/spheroidal (Best aesthetic, convex tissue surface buccolingual and mesiodistal directions)
Sanitary/hygienic (2 - 3mm clearance off the ridge)
When should the saddle/ridge lap be used?
Contraindicated under all circumstances
What are the disadvantages of using a sanitary/hygienic pontic?
Poor aesthetic
Entrapment of food
Sharp line angle
How can teeth be made more aesthetic in patients with recession?
Root surface simulation can be added to the pontics
What are the features of retainers?
Join individual retainers and pontics together
Easy to clean, strong
What are the types of connectors?
Rigid (cast or soldered)
Non-rigid
What is a cantilever?
Only one side of the pontic is attached to a retainer
Replace one tooth
