Malocclusion
Malocclusion (pronunciation: /ˌmaləˈklo͞oZHən/) is a term used in Orthodontics to describe the misalignment or incorrect relation between the teeth of the two dental arches when they approach each other as the jaws close.
Etymology
The term "malocclusion" is derived from Latin, where "mal" means 'bad' or 'wrong', and "occlusio" stands for 'shut or close'.
Types of Malocclusion
There are three classes of malocclusion, classified by Edward Angle, the "father of modern orthodontics", based on the relationship of the mesiobuccal cusp of the maxillary first molar and the buccal groove of the mandibular first molar.
- Class I Malocclusion - The molar relationship is normal or as described above, but the other teeth have problems like spacing, crowding, over or under eruption, etc.
- Class II Malocclusion - Also known as distocclusion, where the lower molars are distally positioned in relation to the upper molars. This is typically associated with a convex facial profile, and a retrusive lower jaw.
- Class III Malocclusion - Also known as mesiocclusion, where the lower molars are mesially positioned in relation to the upper molars. This is typically associated with a concave facial profile, and a protrusive lower jaw.
Related Terms
- Overbite - Vertical overlapping of upper teeth over lower teeth.
- Overjet - Horizontal projection of upper teeth over lower teeth.
- Crossbite - A condition where the upper tooth is behind the lower opposing tooth.
- Openbite - A condition where the upper and lower front teeth do not overlap, creating an opening straight into the mouth.
Treatment
Treatment for malocclusion generally involves orthodontic therapy. The treatment can range from the removal of teeth, growth modification procedures, braces, or Invisalign to correct the position of the teeth, or surgical procedures in severe cases.
See Also
External links
- Medical encyclopedia article on Malocclusion
- Wikipedia's article - Malocclusion
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