Fixed Prosthodontics Practice Questions
Fixed prosthodontics questions follow the clinical sequence: diagnosis and treatment planning, tooth preparation, provisional restorations, impressions, framework design and try-in, occlusion, cementation, and managing problems after cementation. This set also covers bridge design principles, including abutment evaluation, and fixed implant-supported prostheses. The AFK, INBDE, ORE and ADC all favour applied questions, such as which preparation feature improves retention, which luting agent suits a restoration, or why a crown debonded. Understanding the reasoning behind each clinical step matters more than recalling numbers without context.
10 questions · answers and explanations revealed as you go · no sign-up
Questions
Question 1 of 10
Fixed Implant-Supported Prosthodontics
Why is an implant prosthetic screw tightened to a prescribed torque?
The answer is A.
Correct torque produces preload that helps maintain joint stability. Design should permit passive fit, useful retrievability, cleansable contours, controlled occlusion, and material thickness. Implant position, restorative space, screw access, connection geometry, load distribution, and maintenance risks guide retention and framework selection.
Question 2 of 10
Cementation
What is the main purpose of provisional cement for a temporary crown?
The answer is A.
Temporary cement balances short-term retention with retrievability. Cement selection depends on restoration composition, preparation retention, substrate, isolation, and retrievability. Complete seating, correct surface treatment, controlled film thickness, and excess removal are essential; bonding cannot compensate for poor fit.
Question 3 of 10
Framework Design & Try-in
What does floss that passes with light resistance usually indicate at try-in?
The answer is C.
Controlled floss resistance helps confirm contact without excessive tightness. Framework try-in separates fit and design errors before definitive finishing. The restoration should seat completely without rocking, reproduce a continuous margin, provide controlled contacts and clearance, and support veneering material with smooth geometry and adequate bulk.
Question 4 of 10
Tooth Preparation Principles
In a complete crown tooth preparation, resistance form is primarily achieved by which preparation feature?
The answer is A.
Resistance form is provided by the height and near-parallelism of opposing axial walls, which prevent the restoration from being displaced or rotated by oblique occlusal forces. Taper relates to retention. Surface area influences cement retention, not resistance.
Question 5 of 10
Occlusal Considerations
What is a principal occlusal role of anterior guidance in fixed restorations?
The answer is C.
Anterior guidance contributes to the path of mandibular excursion and may separate posterior teeth, reducing harmful excursive contacts. Its steepness and distribution must be compatible with the patient’s envelope of function, periodontal support, opposing dentition, and joint determinants rather than copied from a universal template.
Question 6 of 10
Provisional Restorations
What is a primary biological function of a provisional crown?
The answer is B.
Covering exposed dentin helps limit sensitivity, contamination, and pulpal irritation. A provisional is evaluated for marginal seal, pulpal protection, contour, contact, occlusion, strength, cleansability, and esthetics. Fabrication and repair should protect tissues and preserve planned definitive relationships.
Question 7 of 10
Post-Cementation Complications
What complication commonly follows an open proximal contact beside a crown?
The answer is B.
An open contact permits food packing and may allow tooth movement. Assessment combines symptom timing, vitality and percussion tests, occlusion, contacts, margins, indicated radiographs, and material. Management targets the cause; polishing, adjustment, repair, endodontic care, and replacement are not interchangeable.
Question 8 of 10
Diagnosis & Treatment Planning
What is the primary function of glass ionomer cement (GIC) that distinguishes it from zinc phosphate cement in restorative and prosthodontic applications?
The answer is B.
Glass ionomer cement chemically bonds to calcium in hydroxyapatite of enamel and dentin, and continuously releases fluoride ions — properties absent in zinc phosphate. GIC has lower compressive strength than zinc phosphate. Zinc phosphate has greater solubility concerns.
Question 9 of 10
Bridge (FPD) Design
How is a resin-bonded bridge primarily retained?
The answer is A.
Resin-bonded retainers depend strongly on adhesive bonding to enamel. Fixed partial denture design controls load while preserving cleansability, tissue health, retention, and esthetics. Span length, abutment support, connector behavior, occlusion, ridge form, and material are considered before selecting a pontic or retainer.
Question 10 of 10
Impression Techniques
Why can a long edentulous span be difficult to scan accurately?
The answer is B.
Limited unique geometry can permit cumulative stitching error over a long span. An acceptable impression reproduces the entire finish line and adjacent tooth without voids, pulls, or displacement. Moisture control, tissue health, access, material behavior, and the planned restoration determine whether the record is usable.
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