Animal Dentistry and Oral Surgery Specialists, LLC

2409 Omro Road
Oshkosh, WI 54904-7713


Traumatic occlusion

Traumatic occlusion is a malocclusion that results in tooth on tooth or tooth on soft tissue contact.  Traumatic occlusion is somewhat common in dogs.  In cats, malocclusion is less common; however they do occur.  Tooth on soft tissue trauma can result in periodontal injury and secondary development of periodontal disease.  Tooth on soft tissue contact can result in the development of oral lesions or oral masses.

Clinical case: Trauma from the upper fourth premolar teeth striking the periodontal tissue adjacent to the lower molar teeth.

The left upper fourth premolar (#208) was in
contact with the gingiva adjacent to the lower
left molar tooth (#309).  5mm of gingiva receeded
and periodontal disease subsequently developed.


Dental X ray of lower left molar tooth (#309).              Tooth #309 was completely extracted.
Note the bone loss due to periodontal disease.
This represents stage 2 or 3 of 4 periodontal
disease (stages of periodontal disease)


Pre-operative x-ray of the left upper fourth                    Fourth premolar (#208) completely extracted.
premolar tooth (#208).  This tooth was in
contact with the gingiva adjacent to the
lower left molar tooth (#309).

For this patient, the the traumatic occlusion was bilateral (on both sides).  The right upper fourth premolar (#108) tooth was in contact with the gingiva adjacent to the right lower molar (#409).  A 4mm gingival defect developed adjacent to #409.  Stage 2 periodontal disease was evident. 


Dental X ray of the right lower jaw (mandible)              The right lower molar was completely extracted.
with stage 2 periodontal disease adjacent to
the lower molar tooth (#409).


Dental radiograph of the right upper dental                 The right upper fourth premolar was surgically
arch.                                                                        extracted to avoid further trauma to the mandibular
                                                                                periodontal tissues.

Clinical case of oral trauma due to a malocclusion


Levi has a jaw length discrepancy.  The                     Alternate view of Levi.
maxillas (upper jaws) are short relative to
the mandibles (lower jaws).


Levi's bite was not right.  It was substantially


Right side view demonstrates the jaw                               Left side view of Levi.
length disparity.  The lower jaws are
relatively longer than the maxillas.

The upper fourth premolar tooth strikes the
soft mucosal tissue of the mandible (lower jaw).

Left side view.

Intraoral view of an oral mass that developed secondary to the traumatic occlusion.

Alternate left side view of the oral mass.


The inflammation is severe and painful.                           Alternate view.


Palatal view of the extracted fourth premolar                    Buccal or side view of the sutured tissue after extraction.
tooth that caused the trauma.

Right side view demonstrates the mucosal
injury caused by the upper fourth premolar

Oral masses from traumatic occlusion

Cat dental care