Recording occlusion

Question 1

What are the different types of articulators?

Answer 1

• Arcon
• Average value
• Semi-adjustable

Question 2

What are the angles set for average value articulator?

Answer 2

• Bennet angle set at 15°
• Condylar guidance angle set at 30°

Question 3

Why are semi-adjustable articulator best for diagnostic casts?

Answer 3

• Can set Bennet and Condylar guidance angles
• Can see full range of mandibular movements for occlusal diagnosis and evaluation

Question 4

What are the components of Denar Slidematic Facebow?

Answer 4

• Bite fork
• Transfer Jig assembly
• Earbow
• Reference Plane locator

Question 5

How to record a facebow registration?

Answer 5

• Mark anterior reference point
• Bite registration using bite fork
• ## Assemble Earbow and transfer Jig

Question 6

How do you mark the Anterior Reference Point?

Answer 6

• Mark it on pt right side of face using Reference plane locator and marker
• 43mm apical to incisal edge of anterior teeth (12 ideally)
• It is approximate position of infraorbital foramen

Question 7

How do you record bite registration using bite fork?

Answer 7

• Bite registration paste applied to bite fork
• Bite fork arm to right and locating notch facing up
• Firmly seat to record cusp tips of maxillary teeth
• Don’t engage undercuts
• Check it is parallel with pt coronal and horizontal planes
• Align dental midline with locating notch

Question 8

what’s bite reg with bite fork important for

Answer 8

• Indentations allow accurate repositioning and mounting of maxillary cast

Question 9

what are we recording in facebow

Answer 9

• relationship of the maxilla to the terminal hinge axis of the mandible
• used to mount max cast on articulator

Question 10

how to mount lower cast

Answer 10

• use interocclusal registration
• ICP/ RCP

Question 11

4 ways of ICP registration

Answer 11

• wax
• registration paste
• record block
• no material

Question 12

when do we not use confromative appraoch in registration

Answer 12

• when wnat to increase OVD
• when teeth significatnly out of position (over-eruption)
• want to significantly change appearance
• history of occlusally related failure/ fracture

then use reorgansied approach

Question 13

3 ways of guiding pt to terminal hinge closure (RCP)

Answer 13

• bimanual manipulation
• chin point guidance
• chin point guidance with anterior jig