Ideal Occlusion

Question 1

What’s ideal occlusion ?

Answer 1

Harmonized static and dynamic relationship of teeth and jaw that dentist would like to reproduce when restoring a patients entire mouth to good form and function

Question 2

What’s malocclusion ?

Answer 2

-can be due to improper alignment of teeth within the arch
or
lack of harmony between size and shape of jaws that prevents teeth from fitting together ideallky.

Question 3

Which class is the ideal/normal front to back (anteroposterior) relation between upper and lower arches ?

Answer 3

Class 1 occlusion

Question 4

How does each class of occlusion is defined ?

Answer 4

By the realtionship of first teeth to erupt in adult dentition ( maxillary and mandibular first molars )

If first molars are absent

By relation between maxilllary and mandibular canines.

Question 5

What’s other names of class 1 occlusion ?

Answer 5

Neutrooclusion or normal occclusion

Question 6

What’s class 1 definition ?

Answer 6

Relationship of permanent first molars where the
Tip of MB cusp of max first aligned with MB groove on man first molar

Maxillary canine fits in fascial embrasure between mandibular canine and the 1st premolar

Question 7

What’s orthognathic and related to which class ?

Answer 7

Fascial profile of class 1 patient .
Straight line from the top half of the face to anterior border of mandible ( straight ) not inclined back or forward .

Gnathic = jaw
Ortho = straight ( normal jaw profile ) .

Question 8

What’s orthodontics ?

Answer 8

Tooth straightening

Question 9

What’s the other name for orthognathic profile ?

Answer 9

Meso-gnathic not mesiognathic
( lack of obvious protrusion or retrosion of resting mandible relative to maxillary )

Question 10

Ideal occlusion require ?

Answer 10

Perfect fitting together ( interdigitation ) of upper and lower teeth

Question 11

What’s the relation between incisal edge of maxillary and mandibular anterior teeth ?

Answer 11

it most be normal overjet or normal horizontal overlap overlap ( see pic ).

Incisal edge of maxillary anteriors are labial to Incisal edge of mandibular teeth .

Question 12

How does mandibular incisors seen in normal occlusion ?

Answer 12

Hidden from view by overlaping maxillary incisors ( normal vertical overlap , normal overbite )

Question 13

What’s the normal overjet ?

Answer 13

Normal horizontal overlap

Question 14

What’s normal overbite ?

Answer 14

Normal vertical overlap

Question 15

What’s the position of maxillary posteriors to mandibular ones from buccal surface ?

Answer 15

Buccal cusps and buccal surface of maxillary posteriors buccal to mandibular arch

Question 16

What’s the position of mandibular posteriors maxillary ones from lingual surface ?

Answer 16

Lingual surface of mandibular posterior teeth are lingual to those in maxillary arch

Question 17

Where does lingual cusps of maxillary posterior occlude in mandible ?

Answer 17

Within mandibular occlusion fossa

Question 18

Where does mandibular molars occlude occlude with maxillar molars ?

Answer 18

Occlusion Fossa of maxillary molars

Question 19

Occording to vertical axis of each maxillary tooth where does it positioned in relation to mandibular teeth ?

Answer 19

Each max tooth positioned slightly distal to vertical axis of corresponding mandibular teeth

Example maxillary canine distal to mandibular one

Question 20

Ideal occlusion require ?

Answer 20

Perfect fitting together ( interdigitation ) of upper and lower teeth

Question 21

For perfect interdigitation of upper and lower teeth requires that teeth in each arch be aligned other teeth in each arch .

If one tooth in the arch in class 1 occlusion not aligned do we still call it ideal arch shape ?

Answer 21

No