Interceptive Orthodontics

mixed

interceptive orthodontics occurs when the patient is in .... dentition

7

how old should a patient be when they first see the orthodontist

mesial; permanent molars

premature loss of the primary molars can result in .... shifting of the ....

eruption of the permanent dentition

in phase 1 treatment of premature loss of primary teeth, Patients typically wear space maintainers until the .....

nance

what space maintainer:

- Upper arch

- Acrylic button utilizes tissue support to maintain molar position and prevent mesial drift

- Can cause gingival irritation

lower lingual holding arch

what space maintainer:

- Lower arch

- Wire soldered to molar bands wraps around lingual surface of mandibular dentition to provide tooth support to maintain molar position and prevent mesial drift

- Contacts as many mandibular teeth as possible

band and loop

what space maintainer:

- Wire soldered to molar band or stainless steel crown extends across edentulous space and contacts the next available tooth

- The molar band is typically placed on either the permanent 1st molar (if available), or the primary 2nd molar

Pros:

- Fixed

- Increased comfort

- Ease of oral hygiene

- Can be custom or prefabricated

Cons

- Unilateral

- Useless if supporting primary teeth exfoliate

- Can impede eruption of permanent teeth depending on path of eruption and size of wire window

- Often slips and embeds itself in the gingiva

distal shoe

what space maintainer:

- Molar band or stainless steel crown is soldered to a post

- Post is inserted into the alveolar bone mesial to the 1st molar

- Used when patient has lost the primary 2nd molar prior to the eruption of the permanent 1st molar

Pros

- Can be used if permanent 1st molars are unerupted

- Bone borne

- Fixed

- Increased comfort

- Ease of oral hygiene

Cons

- Boney pin can be inserted into path of erupting teeth or into the crown of the erupting teeth

- Unilateral

- Can impede eruption of permanent teeth depending on path of eruption and size of wire window

- Requires multiple radiographs

- Custom appliance

halterman appliance

what appliance for ectopically erupting permanent 1st molar:

- Distalizes the ectopically erupting permanent 1st molar so that it clears the primary 2nd molar and can erupt properly

- Band the E

- Bracket or button is bonded to the occlusal surface of the ectopically erupting 6

- Looped wire or c-chain applies a distalizing force

- Once the mesial of the 6 is clear, it will erupt on its own

- Also increases arch length

primary molars

ankylosis of primary teeth is most common in .....

no

does Maintaining an ankylosed tooth preserve bone

extracted

Ankylosed primary teeth should be ..... as soon as they are identified

more

Unilateral crossbites are ..... problematic than bilateral crossbites

functional shift

most unilateral crossbites are due to a ..... caused by a symetrically narrow upper arch

palatal expansion

the primary phase 1 treatment for posterior crossbites is ....

leeway

.... is the Difference in the mesio-distal width between the Cs, Ds, and Es, compared to the 3s, 4s, and 5s

1.5

Maxillary leeway space= .....mm per side

2.5

Mandibular leeway space= .....mm per side

Late mesial shift

.....: Loss of leeway space due to the mesial drift of the 6s as the 3s, 4s, and 5s erupt

Cs

step 1 protocol for guidance eruption:

- Extraction of ..... in the early mixed dentition

Ds

step 2 protocol for guidance eruption:

- Extraction of ..... when the 4 roots are ½-2/3 developed

4s

step 2 protocol for guidance eruption:

- Extraction of the ..... as soon as they erupt

91%

If the primary canine is extracted early, the permanent canine erupts normally:

- ..... of the time if the permanent canine is distal to the midline of the lateral incisor

64%

If the primary canine is extracted early, the permanent canine erupts normally:

- ...... of the time if the permanent canine is mesial to the midline of the lateral incisor

yes

if only one permanent canine is mesially inclined, should you still extract both primary canines

1/2

when extracting primary canines to treat mesially inclined permanent canines: Delay extraction of primary canines until the permanent canine roots are at least ..... developed

fremitus

anterior crossbites are incredibly traumatic due to the lower incisor experiencing severe .....

yes

can gingival recession associated with anterior crossbite improve if treated before 8

2x4

what tool for correcting anterior crossbite:

- Orthodontic brackets are used to align the incisors with the goal of correcting the anterior crossbite

- Brackets are placed on the molars and incisors

- 2 molar brackets + 4 incisor brackets=2x4

- Can be placed on one or two arches depending on need

finger spring

what tool for correcting anterior crossbite:

- Modified Hawley retainer

- Can double as its own retainer

- Spring is placed lingual to the lingually displaced incisors

- When the spring is activated, it proclines the incisor out of crossbite

as soon as U6s erupt

phase 1 treatment for class 3 should begin ......

removable

During Phase I, ..... Class II correctors are preferred

activator/bionator

what appliance for phase 1 treatment of class 2:

- Single piece appliance

- Both upper and lower teeth occlude in one acrylic block

- Occlusion and lower lingual acrylic ramp force patient to bite in Class I

- Pattern in the acrylic guides eruption pattern of posterior teeth into Class I occlusion

- Full anterior occlusal coverage prevents supereruption

- The guided eruption of the posterior teeth helps correct a deep bite

activator

An ..... has full palatal acrylic coverage

bionator

A ..... has minimal palatal acrylic

twin block

what appliance for phase 1 treatment of class 2:

- Two piece appliance

- Looks like a Hawley retainer with occlusal coverage

- Bite ramp system

- Bite blocks prevents patient from biting in Class II occlusion

- Bite ramp encourages patient to bite in a more protrusive position

1-3

Most diastemas between ....mm will spontaneously close with eruption of canines and do not require treatment in the mixed dentition