Ortho 101 Glossary

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Normal Occlusion

Dental Malocclusion

Skeletal Malocclusion

Soft Tissue Malocclusion

Orientation Planes

Frontal Plane

Sagittal Plane

Buccal Groove

Retrognathism

Traverse Plane

Convex

Mandibular

Mesiodistal

Mesiobuccal Cusp

Prognathism

Concave

Edward Angle's Classication

Class II Malocclusion

Class III Malocclusion

Class I Malocclusion

Straight

Mesiodistal

Mandibular

Mandibular refers to anything related to the lower jaw (mandible), including its teeth, bones, and movement..

Frontal plane

The frontal plane is a vertical plane that runs side to side, perpendicular to the sagittal plane, dividing the body into front and back sections. It is used to describe superior-inferior (vertical) relationships.

Concave

A concave facial profile is a type of soft-tissue malocclusion where the lower jaw sits too far forward compared to the upper jaw, indicating a Class III malocclusion or underbite..

Prognathism

Prognathism is a skeletal malocclusion where one or both jaws project forward, especially the lower jaw, often leading to a Class III malocclusion or underbite..

Class I Malocclusion

Class I Malocclusion or normal occlusion refers to a normal jaw relationship where the upper and lower teeth align properly, creating a balanced bite..

Class III Malocclusion

Class III is a jaw relationship where the lower jaw (mandible) is positioned too far forward (mesial) compared to the upper jaw, often resulting in an underbite..

Transverse Plane

The transverse plane is a horizontal plane that runs perpendicular to both the sagittal and frontal planes, dividing the body into upper and lower sections. It is used to describe right-to-left relationships.

Sagittal Plane

The sagittal plane is a vertical plane that runs lengthwise through the body, dividing it into left and right sections. It is used to describe anterior-posterior relationships.

Retrognathism

Retrognathism is a skeletal malocclusion where one or both jaws, usually the lower jaw (mandible), are positioned further back than normal, often resulting in a Class II malocclusion or overbite. .

Mesiobuccal Cusp

The mesiobuccal cusp is the front outer cusp of a molar, positioned on the side closest to the midline (mesial) and the cheek (buccal)..

Class II Malocclusion

Class II Malocclusion is a jaw relationship where the lower jaw (mandible) is positioned further back (distal) than normal, often resulting in an overbite..

• In Division 1, the upper front teeth (maxillary incisors) tilt forward .
• In Division 2, the upper central incisors tilt inward.

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Buccal Groove

The buccal groove is a linear depression on a tooth that extends from the chewing surface (occlusal) down the cheek-facing (buccal) surface of a molar..

Mesiodistal

Mesiodistal refers to the direction or measurement between the mesial (front) and distal (back) surfaces of a tooth..

Convex

A convex facial profile is a type of soft-tissue malocclusion where the upper jaw sits too far forward compared to the lower jaw, indicating a Class II bite or overbite..

Edward's Angle's Classification

A classification system used to categorize different types of dental malocclusions based on the relationship between the upper and lower teeth and jaws..

Straight

A straight facial profile is a type of soft-tissue malocclusion where the upper and lower jaws are well-balanced, creating a harmonious and proportional appearance..