Angle and Black's Classifications Quiz

Study Notes

Angle Classification of Malocclusion

Class I:
- Maxillary first molar occludes with the mandibular groove of the mandibular first molar.
- Maxillary canine occludes with distal half of mandibular canine and mesial half of the mandibular first molar.
- Mesognathic facial profile indicated.
Class II Division I:
- Maxillary first molar occludes mesial to the mandibular first molar's groove.
- Anterior teeth are facially protruding.
- Retrognathic profile noted.
Class II Division II:
- Mandibular canine positioned distal to the maxillary canine by width of a premolar.
- Maxillary incisors are upright or retruded.
- Mesognathic profile observed.
Class III:
- Maxillary first molar occludes distal to the mandibular first molar's groove.
- Prognathic profile characterized.

Decay Classification

Class I:
- Decay present in pits and fissures of occlusal surfaces.
- Treatment may include amalgam or composite material.
Class II:
- Decay on proximal surfaces of premolars and molars.
- Diagnosis often through radiographs; requires silver amalgam or gold/porcelain inlay for extensive cases.
Class III:
- Decay on proximal surfaces of anterior teeth.
- Composite material typically used.
Class IV:
- Decay in proximal surfaces of anterior teeth affecting incisal edge or angle.
- Treatment may involve composite or porcelain crown for extensive decay.
Class V:
- Decay located on the gingival third of facial or lingual surfaces.
- Posterior teeth usually treated with silver amalgam; anterior often with composite.
Class VI:
- Decay affecting incisal edges of anterior teeth and cusp tips of posterior teeth.
- Often caused by abrasion; composite resins preferred.

Other Key Terms

Overjet: Horizontal distance between maxillary and mandibular incisors.
Overbite: Vertical distance between maxillary and mandibular incisors.
Interference: Occurs when one tooth contacts before the others.
Centric Occlusion: Refers to the normal occlusion of the teeth.
Tongue Thrust: Improper tongue positioning during swallowing, exerting up to 4 lbs of pressure; difficult to correct.
Crossbite: Misalignment where maxillary teeth are positioned lingually or facially to mandibular teeth.
Open Bite: Lack of vertical overlap of maxillary incisors results in an opening of anterior teeth.

Tooth Version Terminology

Mesioversion: Tooth tilted toward the midline.
Distoversion: Tooth tilted away from the midline.
Linguoversion: Tooth is positioned lingual to normal.
Labioversion/Buccoversion: Tooth tilts toward the lips.
Infraversion: Tooth is below the occlusal line, inadequately erupted.
Supraversion: Tooth is above the occlusal plane in maxilla or below in mandible.
Axioversion: Tooth is tipped or inclined.
Torsiversion: Tooth is rotated or twisted.
Transversion: Tooth positioned incorrectly in the dental arch.

Crossbite Types

Posterior Crossbite: Posterior teeth are either buccal or lingual to their normal position.
Anterior Crossbite: Maxillary incisors are positioned lingually to the mandibular incisors.

Occlusion Types

Edge to Edge Occlusion: Maximum and minimum anterior teeth's incisal surfaces meet.
End to End Occlusion: Cusps of maxillary teeth occlude directly with mandibular teeth.

Description

Test your knowledge on Angle classifications and Black's classifications of malocclusion with this interactive quiz. Each card presents a classification with definitions to help you learn and memorize essential orthodontic terms.