Malocclusion Bite Classification Flashcards

Questions and Answers

What is Class I malocclusion?

Where your bite is positioned properly and your upper teeth line up with your bottom teeth front to back, but your teeth are crooked, crowded, or turned.

What is Class II malocclusion?

Where your upper teeth stick out past your lower teeth (overbite or buck teeth).

What is Class III malocclusion?

Where your lower teeth stick out past your upper teeth (underbite).

What is an overbite?

Vertical overlapping of the upper teeth over the lower. Signup and view all the answers

What is overjet?

Horizontal projection of upper teeth beyond the lower. Signup and view all the answers

What is a cross-bite?

Some of the upper teeth are inside the lower teeth when you bite down. Signup and view all the answers

What is a deep bite?

Excessive overbite or closed bite. Signup and view all the answers

What is archwire?

The main wire that fits into the brackets or tubes which are attached to the teeth. Signup and view all the answers

What are bands in orthodontics?

Thin contoured bands of metal that fit around the teeth and are cemented into place. Signup and view all the answers

What are brackets?

A metal or ceramic part that is glued onto the tooth and serves as a means of fastening the archwire. Signup and view all the answers

What are self-ligating brackets?

Brackets that are used without elastics because the clip holds the wire in place. Signup and view all the answers

What are coil springs used for in orthodontics?

Attached to the archwire and compressed between teeth, exerting force to move teeth. Signup and view all the answers

What is a buccal tube?

A small metal part that is welded on the outside of a molar band. Signup and view all the answers

What are elastics?

Small rings or colored modules used to attach the archwire to the brackets. Signup and view all the answers

What is ligature wire?

A small wire used to attach the archwire or to close or rotate teeth together. Signup and view all the answers

What is a fixed appliance in orthodontics?

An orthodontic component that is cemented or bonded to the tooth, not removable by the patient. Signup and view all the answers

What is a power chain?

Used to close space, very different from elastics but with similar placement. Signup and view all the answers

What is a headgear tube?

A larger tube attached to the upper molar band for inserting headgear facebow. Signup and view all the answers

What are hooks in orthodontics?

Attachments to bands and brackets used to hook rubber bands. Signup and view all the answers

What are steel ties?

Used to cinch archwires, continuous ties hold space closed. Signup and view all the answers

What are Kobayashi hooks?

A ligature tie hook used to add hooks for rubber bands on brackets or bands without hooks. Signup and view all the answers

What are separators or spacers?

Various types (wire, rubber, and springs) placed in posterior teeth to create space for bands. Signup and view all the answers

What is tongue space in orthodontics?

A small amount of impression material mounded in the open space on the lower impression for the tongue. Signup and view all the answers

Study Notes

Bite Classifications

Class I malocclusion: Proper bite alignment, but teeth may be crooked, crowded, or turned.
Class II malocclusion: Characterized by upper teeth protruding past lower teeth, leading to an overbite.
Class III malocclusion: Occurs when lower teeth extend beyond upper teeth, known as an underbite.

Bite Characteristics

Overbite: Refers to the vertical overlap of upper teeth over lower teeth.
Overjet: Indicates the horizontal extension of upper teeth beyond the lower teeth.
Cross-bite: Describes the situation where some upper teeth are positioned within lower teeth during biting.
Deep bite: Excessive overbite where the upper teeth severely overlap the lower teeth.

Orthodontic Components

Archwire: Main wire that attaches to brackets or tubes, essential for tooth movement.
Bands: Metal rings cemented around teeth, particularly molars, to facilitate tooth movement.
Brackets: Metal or ceramic pieces glued to teeth that hold the archwire in place.
Self-ligating bracket: Brackets that secure archwire without elastics, using a built-in clip.

Additional Appliances

Coil springs/open: Attached to archwire, these can compress between teeth and exert a pushing force.
Coil springs/closed: Custom-sized springs maintaining space or exerting pulling force between teeth.
Buccal tube: A small welded metal part on molar bands that holds various orthodontic devices.
Alastics: Colored modules or small rings used to connect archwire to brackets.

Other Orthodontic Features

Ligature wire: Small wire to attach archwire or adjust tooth positioning.
Fixed appliance: Orthodontic components bonded to teeth, not removable by the patient.
Power chain: A continuous chain used to close gaps, differs from alastics in design.
Headgear tube: Larger tube on upper molar bands for headgear attachment.

Hooks and Ties

Hooks: Attachments on bands and brackets for rubber band connections.
Steel ties: Used to secure archwires, maintaining space closure through continuous ties.
Kobayashi Hooks: Ligature hooks added to brackets or bands lacking built-in hooks.

Space Management

Separators or spacers: Various forms (wire, rubber, springs) utilized to create space for band installation in posterior teeth.
Tongue space: Mounded impression material placed in lower impressions to replicate space occupied by the tongue.

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Description

Explore the different classes of malocclusion with these flashcards. Learn about Class I, Class II, and Class III malocclusions, their definitions, and characteristics. Perfect for dental students and practitioners wanting to enhance their understanding of bite classification.