AESTHETICS+INICSAL EDGE

Question 1

FACTORS APPEARANCE TEETH

Answer 1

1. Outline Form - teeth, gingivae
2. Contour - thickness
3. Symmetry - divergence, spacing
4. Proportion
5. Colour
   –> specular reflection cervical+middle
   –> diffuse incisal

• Translucent = light reflect, absorb, transmit
  -> metal crowns block transmission grey gingiva
  –> build up composite layers, 0.5mm veneers, ceramics

Question 2

FEATURES MALE vs FEMALE

Answer 2

• Male = squarer, distinct distal edges, twist distally
• Female = rounder, softer, twist mesially

Question 3

FEATURES AESTHETIC REST

Answer 3

• Buccal Corridor = keep open, ≠ bulky rest, distinct △s
• Smile Line = teeth contour follows smile contour: centrals longer > lateral > canine
• Papilla lengths + Cervical margins correct height

Question 4

TRAUMATIC DENTAL INJURIES

Answer 4

• Biological, psychological, financial impact
• Caries ↓ but TDI unchanged
• Multifactorial = TDI young + tooth surface loss older

Question 5

FAILURE INCISAL EDGE RESTORTIONS

Answer 5

• Initial loss after placement = faulty operative tech or trauma
  o ≠ diagnosis+plan –> bulk loss, large fracture = crown/veneer not comp
  o ≠ interocclusal space –> load, stress, no res, fracture
  o ≠ enamel bevel length <2mm
  o ≠ rubber dam isolation
  o Incorrect use e/d bonding

Repeated trauma
o breaks rest same as intact e/d
o rest techniques strength<natural tooth

Question 6

RESTORING

Answer 6

• Impression –> model cast = silicone index of ideal contours –> build up e/d comp
• Restorative escalator= minimally invasive rest/crown interference, ↑ chance tooth survive