Orthodontic Module Columbia College

Mesognathic profile

Class 1

Retrognathic profile

Class 11

Proganthic profile

Class 111

Distoclusion

Class 11

Mesioclusion

Class 111

Neutroclusion

Class 1

Which etiologic factor is considered a major cause of malocclusion?

Heredity

A class 11 molar relationship can occasionally be a normal result of treamtment

True

According to Lischer's nomenclature, a tooth that is inferior to the occlusal plane in the maxilla is?

Superaversion

The following definition pertains to what terminology?

"forces acting upon bone influence bone structure"

Wolff's law

Displaced towards the tongue

linguoversion

Superior to the occlusal plane in the mandible

Supraversion

Roated

Torsiversion

Tipped/inclined

Axioversion

Inferior to the occlusal plane in the mandible

Infraversion

Distally displaced

Distoversion

Root resorption

Risk

Improve long term dental and periodontal health

Goal

Improve dental and facial aesthetics

Goal

Pulp devitalization

Risk

Decalcification

Risk

Improve dental function

Goal

A negative overjet

Anterior crossbite

The general term for how much the upper incisors overlap the lower incisors

Overbite

An excessively positive overbite

Deep bite

A negative overbite

Open bite

Which of the following is referred to as "braces"?

Banded/bonded fixed appliances

Force on one tooth will not affect the periodontal ligaments of the adjacent tooth/teeth

False

The identifying dot on a bracket appears on which tie wing?

Distogingival

Orthognathic surgery

Corrective

Crossbite Correction

Interceptive

Space regaining appliance

Interceptive

Discing primary teeth

Preventive

Space mainainer

Preventive

Serial extractions

Interceptive

The surgical movement of bone

Orthognathic

The movement of teeth

Orthodontic

The movement of bone by application of pressure

Orthopaedic

Which tooth is most likely to have a bracket/bond w/ a hook on it?

Canines

Cells that produce bone

Osteroblasts

Produces an orthodontic/orthopaedic force

Active treatment

Cells that resorb bone

Osteoclasts

Maintains the status quo

Passive treatment

Lower holding arch

Passive

Crib

Passive

Clear aligner

Active

Lingual retainer

Passive

Hawley

Passive

Quad helix

Active

A root apex is typically in what direction in relation to the corresponding crown?

Distal

Which type of appliance produces the most predictable results?

Fixed appliances

Which of the following would a PAN not be used for in orthodontics?

Dental Caries

When taking a wax bite registration, the softened was bite should be placed?

Over the occlusal surfaces of the maxillary teeth

When exposing a cephalometric radiograph, the patient should bite on their back teeth in centric occlusion?

True

Which condition does not compromise oral health?

Heart disease

How should the Frankfort horizontal plane be positioned when exposing a cephalometric radiograph?

Parallel to the floor

Debanding study models are considered to be?

Final impressions

Which extraoral photography view is optional?

Full frontal; smiling

A hand/wrist radiograph is used by an orthodontist for what purpose(s)?

Growth potential and skeletal age

Polish with fluoridated pumice

First

Dry band

Second

Apply wax to band attachments

Third

Mix fluoridated cement

Fourth

Apply cement to inner surface of band

Fifth

Place band using band seater instrument

Sixth

Remove excess cement prior to curing

Seventh

Which tie wing is the identification marker found on?

Distogingival

If properly inserted, the locking coil of a steel spring separator should be?

On the lingual side

Direct and indirect bonding

Medium pumice/Fluoride-free

Cementing bands

Pumice with fluoride

After debonding

Prophy paste w/ fluoride

If a band is the correct size, it will fit over the height of contour and contact point with finger pressure?

False

Elastics= close or settle open bite

Vertical

Elastics= mesialize maxillary posterior teeth

Class III

Elastics= Corrects crossbite

Crossbite or through-the-bite

Elastics= Mesialize mandibular posterior teeth

Class II

The purpose of Class II elastics is to?

Mesialize mandibular posterior and distalize maxillary anteriors

Placed before the archwire is inserted (under the archwire)

Rotation wedge

Placed after the archwire is inserted (over the archwire)

Crimpable hook

Can be placed either under or over the archwire

Kobayashi tie

Placed on the archwire, prior to insertion (on the archwire)

Slide-on hook or stop

Placed after the archwire is inserted (over the archwire)

Crimpable stop

Placed on the archwire prior to insertion (on the archwire)

Comfort tubing

Facilitates intraoral elastics

Split hook

Immobilizes the archwire

Crimpable stop

Minimizes tissue irritation

Comfort tubing

Corrects stubborn tooth rotations

Rotation wedge

Helps with eruption of impacted teeth

Elastomeric threads

Maintains space

Closed coil

Creates space

Open coil

Closes spaces

Chain elastic

Improved occlusal realtionships

Intraoral elastics

A clear aligner should not rock when seated fully?

True

Palatal expansion appliances are always activated prior to cementation?

True

A clear plastic retainer is called a/an?

Essix

A "three minute check" assesses?

Archwires, bands, oral hygiene

You are checking the passivity of a lower holding arch. When one of the bands is half seated on the 4.6 the other band should be directly over which tooth?

3.6

A removable appliance should be removed from the mouth for cleaning?

True

A patient who has separators placed should be instructed to not floss the teeth with separators?

True

A patient calls and informs you that a bracket has come loose. What should you instruct them to do?

Come to the office ASAP