Exam

Question 1

VDO

Answer 1

• The distance between two selected anatomic or points
• usually one on the tip of the nose and the other upon the chin
• one on a fixed and one on a movable member.

Question 2

freeway space
Inreocclusal rest space

Answer 2

The difference between the vertical dimension of rest **
and the vertical dimension while in occlusion(VDO).**

Question 3

Methods for determining VDO

Answer 3

Mechanical = pre existing extraction records
facila measurements
ridge relations
existing dentures

Question 4

Physiological

Answer 4

• Rest position = adjust rims
• Phonetics = assessed at try in
• Asthetics = patient guided
• swollowing threshold =
• Tactile sense = comfort

Question 5

phonetics

Answer 5

Alveolar sounds = tip of tongue to anterior palate
Sibilants = incisors touch
Labiodental = upper incisors on lower lip
linguodental = tip of tongue protrudes
bilabial = lips contact

Question 6

Zarbs test for VDO

Answer 6

1. Judge overall facial support.
2. Observe the space between rims when jaws are at rest.
3. Two-dot technique (measuring in occlusion and at rest).
4. Observe “s” sound – the average speaking space.

Question 7

Mouthguards

Answer 7

Deciduous = Average mouth 2 layers 2mm+2mm
Permanent = Average mouth 2 layers 4mm+2mm
Heavy contact sport 3 layers 2mm+4mm+2mm
Boxing = Average mouth Bi-Maxillary Mouth Guard
Large mouth follow secondary dentition rules

Question 8

Rules of mouthguards

Answer 8

• Must not impact on breathing
• Made to patients correct MMR
• Should be comfortable
• Must no be too thick
• dont impinge on frenums
• dont overextend
• not too think
• not past 6’s

Question 9

Order in registration rims appointment

Answer 9

Measure VDO two dot technique
Insert wax rims measure lip line
occlusal plane
midline
smile line
Impression material/ bite fork –> centric occlusion MMR
Face bow, ear bow anterior ref point –> Free way space, VDO provisional