Changes

[[File:Mandibular prognathic bite.jpg|200px|thumb|right|Mandibular prognathic (undershot) bite]]

[[File:Mandibular prognathic bite.jpg|200px|thumb|right|Mandibular prognathic (undershot) bite]]

[[File:Mandibular brachygnathic bite.jpg|200px|thumb|right|Mandibular brachygnathic (overshot) bite]]

[[File:Mandibular brachygnathic bite.jpg|200px|thumb|right|Mandibular brachygnathic (overshot) bite]]

===Normal Occlusion===

===Normal Occlusion===

The ideal occlusion can be described as the perfect interdigitation of the upper and lower teeth. In the normal dog, the ideal tooth positions in the arches are defined by the '''occlusal, inter-arch and interdental relationships''' of the teeth.  

The ideal occlusion can be described as the perfect interdigitation of the upper and lower teeth. In the normal dog, the ideal tooth positions in the arches are defined by the '''occlusal, inter-arch and interdental relationships''' of the teeth.  

'''Mandibular Brachygnathic Bite''': A mandibular brachygnathic bite, often called ‘overshot’, and occurs when the mandible is shorter than normal. This often results in the mandibular canine [[Category:Teeth - Anatomy & Physiology|teeth]] contacting the [[Hard Palate|palate]], causing trauma.  

'''Mandibular Brachygnathic Bite''': A mandibular brachygnathic bite, often called ‘overshot’, and occurs when the mandible is shorter than normal. This often results in the mandibular canine [[Category:Teeth - Anatomy & Physiology|teeth]] contacting the [[Hard Palate|palate]], causing trauma.  

'''Wry Bite''': A wry bite occurs if one side of the head grows more than the other side. In its mildest form a one-sided prognathic or brachygnathic bite develops. In more severe cases, a crooked head and bite develop with a deviated midline. An open bite may also develop in the incisor region so that the affected teeth are displaced vertically and do not occlude. <font color="red">(pic6 malocclusion)</font color>

'''Wry Bite''': A wry bite occurs if one side of the head grows more than the other side. In its mildest form a one-sided prognathic or brachygnathic bite develops. In more severe cases, a crooked head and bite develop with a deviated midline. An open bite may also develop in the incisor region so that the affected teeth are displaced vertically and do not occlude.  

'''Narrow Mandible''': In some animals, the mandible is too narrow with respect to the upper jaw. The result is that the lower canines impinge on the maxillary [[Gingiva|gingivae]] or the [[Hard Palate|hard palate]] instead of fitting into the diastema between the upper third incisor and upper canine on either side. The animal may not be able to close its mouth and injury to the gingivae or palatal mucosa commonly occurs. In severe, untreated cases an oronasal communication may develop over time. This condition is seen in both the primary (deciduous) and permanent dentition. Persistent mandibular primary canines will further exacerbate the condition, as the permanent mandibular canines erupt medially to their primary counterparts. The incorrect dental interlock will interfere with the normal growth in width and length of the developing mandible. The condition can also be caused by persistent primary mandibular canines in a mandible of normal width. <font color="red">(pic 7 malocclusion)</font color>

'''Narrow Mandible''': In some animals, the mandible is too narrow with respect to the upper jaw. The result is that the lower canines impinge on the maxillary [[Gingiva|gingivae]] or the [[Hard Palate|hard palate]] instead of fitting into the diastema between the upper third incisor and upper canine on either side. The animal may not be able to close its mouth and injury to the gingivae or palatal mucosa commonly occurs. In severe, untreated cases an oronasal communication may develop over time. This condition is seen in both the primary (deciduous) and permanent dentition. Persistent mandibular primary canines will further exacerbate the condition, as the permanent mandibular canines erupt medially to their primary counterparts. The incorrect dental interlock will interfere with the normal growth in width and length of the developing mandible. The condition can also be caused by persistent primary mandibular canines in a mandible of normal width. <font color="red">(pic 7 malocclusion)</font color>