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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 relationship''' with the [[Oral Cavity Overview - Anatomy & Physiology|mouth]] closed can be defined by the following:
:*Maxillary incisor teeth all positioned rostral to the corresponding mandibular incisor teeth.
:*Mandibular canine tooth is inclined labially and bisects the interproximal space between the opposing maxillary third incisor tooth and canine tooth.
:*Maxillary premolar teeth do not contact the mandibular premolar teeth.
:*The mesial crown cusp of the maxillary fourth premolar tooth is positioned lateral to the space between the mandibular fourth premolar tooth and the mandibular first molar tooth.
This is described as '''orthoclusion'''.
The length of a dog's jaw is most importantly determined by its '''genetic background'''. [[Dental Malocclusion|Problems]] exist commonly in dogs mainly due to the great variation in [[Skull and Facial Muscles - Anatomy & Physiology|skull]] types within the species. Other factors can influence jaw length during growth, such as diet, metabolism, trauma, infection and forces within the mouth.
<center><gallery widths=250px heights=180px mode="traditional">
File:Dog teeth occlusion 2.jpg|Occlusal assessment – mandibular incisors occlude on the palatal aspect of the maxillary incisors (known as a scissor bite), the mandibular canine interdigitates half way between the maxillary canine and third incisor, and the premolars interdigitate in a “picking shear” effect.
File:Dog incisor occlusion.jpg|Occlusal assessment of the incisors of a dog.
</gallery></center>
[[Category:Oral Examination]]
[[Category:To Do - Dentistry preMars]]
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