Malocclusion
Brachygnathism refers to a condition in dogs in which an overbite, or overshot upper jaw, exists. Conversely, prognathism is the term referring to the undershot jaw (underbite). Both conditions are inheritable traits, passed from one generation to another. In fact, prognathism is considered normal for certain breeds, such as pugs, boxers, and bulldogs. Although not life-threatening, these anatomic maladies can interfere with normal biting action and eating, and can predispose to dental and jaw problems in affected dogs. As a result, dogs suffering from distinct overbites or underbites (unless normal for the breed) should be surgically neutered to prevent the propagation of these undesirable traits.
Malocclusion can also result from improperly positioned deciduous teeth creating abnormal eruption pathways for the permanent ones. Dental examination of the deciduous teeth performed on puppies and kittens as early as 8 weeks of age can help identify potential problems. In many instances, simply removing the offending deciduous tooth clears the path for the proper eruption of its permanent successor.
Surgical repair or reconstruction of the jaw can be used to repair trauma-induced malocclusions, which is the most common type of malocclusion seen in cats. Orthodontic correction of brachygnathism and prognathism has been utilized in select cases, yet for ethical reasons, such procedures should be performed only for medical purposes, not for cosmetic gains.
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