Angle’s Classifications of Malocclusion

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Did you know that there are numerous ways to classify Malocclusions (bites)? The most common method  is known as the Angle Classification. Today, we will share with you some details about the classifications of malocclusions according to Edward H. Angle. This will help provide some details for classifying your orthodontic case.

Developed by Edward H. Angle in 1890, the Angle Classifications are based on the relationship of the buccal groove of the mandibular first permanent molar and the mesiobuccal cusp of the maxillary first permanent molar. This classification is considered to be one of the most commonly used methods for identifying misalignment for molars.

According to Edward H. Angle, the normal occlusion (bite) exists when the mesiobuccal cusp of the upper first molar occludes with the buccal groove of the lower first molar. Any diversion from this alignment falls under the three classifications of malocclusion, and these categories are as follows:

Class I malocclusion: A normal molar relationship is present, but there is crowding, misalignment of the teeth, rotations, cross-bites, and other alignment irregularities.

Class II malocclusion: The mesiobuccal cusp of the maxillary first molar occludes anterior to the buccal groove of the mandibular first molar. Class II is categorized into two further parts:

  • Class II, Division 1: The anterior maxillary teeth are tilted forward or proclined, presenting a large overjet.
  • Class II, Division 2: The anterior maxillary teeth are retroclined, creating a deep overbite.

Class III malocclusion: The mesiobuccal cusp of the upper first molar falls posterior to the buccal groove of the lower first molar.

Knowing the basics of the  Angle classification of malocclusion can help our patients learn more about their orthodontic problems. At York Mills Orthodontics, we share knowledge and provide services that will promote our patients’ oral health. If you have any questions about malocclusions or orthodontic treatment, contact our office in North York.

-The York Mills Orthodontics Team

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