Malocclusion

Question 1

What’s malocclusion

Answer 1

Occur in class 1,2,3 or jaw relationship .
When it affect appearance , comfort , function

Related to teeth alignment or jaw relation

Question 2

What’s labioversion and buccoversion ?

Answer 2

It’s the tooth that out of alignment to labial ( anteriors ) or buccal ( posteriors ) .

Question 3

What’s linguoversion ?

Answer 3

Teeth out of alignment to lingual side

Question 4

What’s torsiversion ?

Answer 4

Tooth that is twisted ( rotated ) around its tooth axis

Question 5

What’s supraeruption or extrusion ?

Answer 5

In most of times maxillary 3rd molar cause there is no anatagonist , teeth that overerupted toward mandible

Question 6

What’s infraocclusion. ( infra version ) ?

Answer 6

Tooth is abnormally short relative to the rest of occlusion plane

Question 7

When does infravesrion occur ?

Answer 7

When short ordinary tooth retained into adulthood

Or when

Primary or secondary tooth loses it PDL and the cementum of the root fuses with surrounding alveolar bone preventing further eruption ( ankylosis fusion of cementum with bone )

Question 8

What is end to end occlusion ?

Answer 8

When buccal cusp of maxillary posteriors line up directly aver mandibular buccal cusps and are not buccal to them ( it’s malocclusion )

Question 9

What’s posterior cross bite ?

Answer 9

It’s also called reverse articulation .
When mandibular posterior teeth positioned too far buccally ( and not maxillary ones ) which makes the lingual cusps of man posteriors positioned in the central fossa of maxillary teeth .

In normal buccal cusps of mandible should be positioned in the central fossa .

Question 10

What’s posterior cross bite ?

Answer 10

It’s also called reverse articulation .
When mandibular posterior teeth positioned too far buccally ( and not maxillary ones ) which makes the lingual cusps of man posteriors positioned in the central fossa of maxillary teeth .

Common in class 3 occlusion

In normal buccal cusps of mandible should be positioned in the central fossa .

Question 11

What’s the other form of cross bite ?

Answer 11

When the maxillary is too much buccal .
When 2 mandibular cusps lingual and fascial positioned lingual to maxilllary molars all tooth is lingual to maxillary molars .

Question 12

What’s the 2 forms of cross bite ?

Answer 12

1. Mandibular buccal cusps are buccal to the maxillary buccal cusp and buccal cusps of maxillary occlude in the central fossa ( may due to narrow maxilla in class 3 ) .
2. Mandibular molars are too much lingually and buccal maxillary too much buccally ( too much in there normal position ) may maxilla too wide or mandible is too small .

Question 13

What’s anterior cross bite ( reverse articulation ) ?

Answer 13

When mandibular anteriors are fascial to maxillary anterior teeth .

Question 14

What’s anterior overbite or severe overbite ?

Answer 14

When maxillary anteriors overlap mandibular inoisors down to the level of cervical lines of mandibular incisors .

Question 15

What’s the complication of severed overbite ?

Answer 15

Severe over bite : man incisors impinge upon tissue of the roof of the mouth ( hard palate ) and result in an imprint or damage to the tissue.
Jaw joint problems can occur since mandible can’t move freely forward without dropping down considerably before it can move forward.

Question 16

What’s edge to edge contact ?

Answer 16

When posteriors are in max intercuspation and maxillary Incisal edges line up touching mandibular Incisal edges with no vertical overlap.

Question 17

what’s anterior open bite ? How is the posterior occlusion in these people ?

Answer 17

When posterior teeth occlude but there is a space between opposing incisal edges also callled open occlusion relationship .

Persons with this relationship , posterior teeth occlude as the mandible moves forward but not the anterior teeth.

Question 18

In which malocclusion form contribute to crepitation ( crackly or grating sound within the jaw joint during function ) ?

Answer 18

Severe overjet , posterior teeth occlude together but maxillary incisors are considerably anterior to mandibular ones , mandibular incisors are in normal position but the PROPLEM from maxillary .

Overjet is ( horizontal overlap ) .

Question 19

Overjet related to which class ?

Answer 19

Class 2

Question 20

What’s premature contact ?

Answer 20

It’s also called reflective occlusal contacts .
Poorly aligned teeth that occlude before other teeth in the mouth .

Question 21

What’s makes the premature contact teeth different from others in way of occlusion forces ?

Answer 21

These teeth are exposed to heavier forces than other teeth .
Espiciallly in bruxism .

Question 22

Why do we call the premature contact , deflwctive occlusal contacts ?

Answer 22

If upon closing in a posterior position the teeth don’t close directly into best or tightest fit but instead hit the prematurity , which deflects the mandible ( change direction of mandible ) before its reach its tightest fit .

Question 23

What’s premature occlusion complications ?

Answer 23

Wearing away of enamel forming a facet or flat spot , most seen in occlusal surface of mandibular molars and premolars , under certain circumstances , this imbalance can cause muscle pain .