There are several classifications of malocclusion
(the
improper coming together of teeth)
which may require orthognathic surgery:
Reasons for
orthognathic surgery
The malocclusion of the teeth can create greatly
destructive forces among the five powerful muscles that control the closing and
opening of the jaw. These muscles generate a tremendous force when clenching,
grinding or chewing. Misalignment can seriously damage the function and
aesthetic appearance of the teeth in many ways if left untreated,
Class I
Occlusion
This malocclusion means that the lower anterior
incisors sit directly behind the upper anterior incisors when the patient bites
down. This is considered less destructive than Class II and Class III
malocclusions.
Class II
Malocclusion
This is identified when the lower anterior incisors
lie significantly behind the upper anterior incisors during the biting process;
in some cases hitting the soft tissue behind the upper incisors. This is
commonly referred to as an overbite and can cause discomfort, bone damage,
excessive wear of the front teeth, and tooth loss.
Class III
Malocclusion
This is commonly known as an underbite and occurs
when the lower anterior incisors and lower jaw are positioned beyond the upper
teeth, making the lower jaw much more prominent than the upper jaw.
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