Prosthodontics
Core concepts
Removable: components of a removable partial denture (major/minor connectors, rests, clasps, indirect retainers), Kennedy classification and Applegate's rules, and principles of design (rigid major connector, stress distribution). Complete denture: impression techniques, jaw relations, vertical dimension, balanced occlusion, and denture base extension. Fixed: crown and bridge types, preparation designs (ferrule, taper, finish line), abutment selection, and cementation. Implant prosthodontics: implant-supported crowns/bridges, attachments, and occlusal considerations.
Traps
Kennedy classification is based on the most posterior edentulous area, not the number of teeth missing. Applegate's rules: classification after extractions, third molars not counted if not to be replaced. Questions often confuse indirect retainer function (prevents rotation) with direct retainer (retention). For complete dentures, remember the neutral zone and that balanced occlusion is needed for stability. Ferrule effect (≥1.5–2 mm of sound tooth) is a common test point for endodontically treated teeth.
Worked example
Rule of thumb: "Classify by the most posterior bounded or free-end space; then apply Applegate's rules." A patient missing all posterior teeth on one side with a free-end saddle is Kennedy Class II. If a stem asks which component prevents the RPD from rotating around the fulcrum line, the answer is the indirect retainer.