TMJs + Articulators

Question 1

What are the anatomical guide planes?

Answer 1

• Incisal guidance
• Cuspal inclines
• TMJ

Question 2

Mandibular movements are guided by?

Answer 2

• TMJ
• Teeth

Question 3

So what do we need to do?

Answer 3

• Simple casts for static analysis of teeth:
  Orthodontic analysis
  Wear analysis
• Complex occlusal analysis
• Removable prostheses
• Making restorations not involved in guidance
• Fabricating restorations involved in guidance
• Reorganising the occlusion
• Provision of splints

Question 4

Give examples of articulators

Answer 4

• Hand held
• Simple hinge
• Plane line
• Average value
• Semi-adjustable - denar

Question 5

describe hand held casts

Answer 5

• Fine for simple study models
• If sufficient reference teeth

Question 6

describe simple hinge articulators

Answer 6

• Not really an articulator
• Cast relocator
• Movements not representative

Question 7

describe plane line articulator

Answer 7

• Hinge axis may be more anatomical but arbitrary
• Limited value for simple restorations - in particular those not involved in guidance

Question 8

describe average value articulator

Answer 8

• articulator hinge axis nearer condylar hinge axis
• average condylar guidance angles
• average excursive movements possible
• Use:
• Simple fixed prostheses for teeth not involved in guidance
• removable prostheses

Question 9

Answer 9

Question 10

Answer 10

Question 11

Answer 11

Question 12

Answer 12

Question 13

Answer 13

Question 14