Occlusion quiz

Question 1

What does a facebow registration do?

Answer 1

• Transfers relationship between maxillary teeth and axis of mandibular rotation

Question 2

What is a function of a facebow?

Answer 2

• Transferring angle of occlusal plane relative to horizontal reference plane

Question 3

Through careful design of occlusal surfaces the property of occlusal forces the the dentist is most able to influence is?

Answer 3

• Direction

Question 4

The principle radiographic sign of occlusal trauma is?

Answer 4

• Generalised widening of PDL space

Question 5

When views from the lateral aspect, the downward movement of the condyle during protrusion forms an angle to horizontal plane know as?

Answer 5

• Sagittal condylar guidance angle

Question 6

In relation to complete dentures, one of the principle objectives of the jaw registration is?

Answer 6

• Determine the intermaxillary relationship in retruded contact position

Question 7

In the intercuspal position, ideally?

Answer 7

• Tips of palatal cusps of upper posterior teeth should occlude with occlusal surface of lower posterior teeth

Question 8

During mastication, whilst chewing on the left molar teeth - how does the condylar head move?

Answer 8

• Right condylar head moves downwards, forwards and medially

Question 9

Which articulator is suitable for use when constructing complete dentures?

Answer 9

• Semi hinge
• Fixed condylar
• Semi-adjustable
• Fully adjustable

Question 10

What is Christensen’s phenomenom?

Answer 10

• Gap that appears between posterior ends of opposing flat occlusal rims when mandible is protruded

Question 11

During closure along retruded axis, point at which the teeth contact is called?

Answer 11

• Retruded contact position

Question 12

During lateral excursion the predominant movement of the working condyle is?

Answer 12

• Rotation about a vertical axis

Question 13

True or False - The retruded axis is a mandibular position dependent on presence of teeth?

Answer 13

• False

Question 14

True or False - The retruded axis is a border movement?

Answer 14

• True

Question 15

True or False - When the condylar heads are in their most superior position within the mandibular fossa the mandible is in protrusion?

Answer 15

• False

Question 16

True or False - At the end of the chewing cycle the mandible aims for ICP

Answer 16

• True

Question 17

True or False - Forces on teeth are greater during parafunction than function?

Answer 17

• True

Question 18

True or False - In canine guidance there should be some contact between teeth on non-working side

Answer 18

• False

Question 19

True or False - Most restorations should be made using reorganised approach

Answer 19

• False

Question 20

True or False - In the reorganised approach ICP and RCP are made coincident

Answer 20

• True

Question 21

True or False - When adopting a conformative approach an inter-occlusal registration is always necessary

Answer 21

• False

Question 22

True or False - When adopting a reorganised approach an inter-occlusal registration is always necessary

Answer 22

True

Question 23

True or False - For most restorations condylar guidance angles on an articulator should be customised to match those of the pt

Answer 23

• False

Question 24

True or False - When adopting a conformative approach occlusal contacts that exist between natural teeth should still be present after restoration is placed

Answer 24

• True