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King's Year 4 BDS: Prosthodontics · Meedu
Course
Dentistry
King's Year 4 BDS: Prosthodontics
All-Ceramic Crowns
Shortened Dental Arch
Pros Tutorial 1: Complete Dentures — Supporting Tissues, Functional Activity & Polished Surfaces
Pros Tutorial 2: Complete Dentures — Primary & Secondary Impressions
Pros Tutorial 3: Complete Dentures — Establishing the Jaw Relations
Pros Tutorial 4: Complete Dentures — Try-In
Pros Tutorial 5: Complete Dentures — Fit
Pros Tutorial 6: Complete Dentures — Problem Solving
Pros Tutorial 7: Partial & Complete Immediate Dentures
Pros Tutorial 8: Trouble Shooting in Prosthodontics
Pros SDL 6: Creating a Pleasing Appearance with Complete Dentures
Pros SDL 7: Overdentures
Pros SDL 8: Partial & Complete Immediate Dentures
Pros SDL 9: Complete Dentures Opposed by Natural Teeth, Partial Dentures or Bridges
Pros SDL 10: Gerodontology & Complete Dentures
Pros SDL 11: Gerodontology — Partial Dentures
Pros SDL 12: Soft (Resilient) Lining Materials, Relining & Repairs
Pros SDL 13: Crowns
Better Communication with the Laboratory
Pros SDL 1: Complete Dentures — Anatomy of Supporting Tissues
Pros SDL 2: Complete Dentures — Functional Activity & Polished Surface Design
Pros SDL 3: Preparation of the Mouth & Impression
Pros SDL 4: Complete Dentures — Jaw Relations
Pros SDL 5: Articulators & Articulation
King's Year 4 BDS: Prosthodontics
Year 4 Prosthodontics module at King's College London Dental Institute. Lectures (lab communication, all-ceramic crowns, shortened dental arch), complete dentures ICC tutorials 1–8 and supporting self-directed learning series covering anatomy of supporting tissues, polished surface design, impressions, jaw relations, articulators, aesthetics, overdentures, immediate dentures, gerodontology, soft lining materials, repairs and crowns.
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A zirconia ceramic restoration develops a surface crack under occlusal loading. Explain why crack propagation is self-limiting in this material compared to alumina.
Select the correct answer
A.
Zirconia has a higher elastic modulus than alumina, absorbing more energy before fracture propagation occurs
1
B.
The cubic crystal structure of zirconia at room temperature provides inherent resistance to crack tip stress concentration
2
C.
Tensile stress at the crack tip triggers a tetragonal-to-monoclinic phase transformation, inducing compressive stresses that oppose further crack advance
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D.
Zirconia undergoes plastic deformation at the crack tip, dissipating energy through dislocation movement analogous to metallic alloys
4
E.
Grain boundary silica phases in zirconia deflect cracks along low-energy pathways, reducing the effective stress intensity factor
5
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