overshot jaw free sample

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Hi, hoping someone can clarify a few things for me. Titus is 6 months old and is my first Dogo. He seems to have an overshot jaw. Is it normal at his age?

I can"t find much breed specific information for jaw growth on the internet. I"m hoping that the jaws do grow at differnt rates and that his lower jaw will catch up to his upper jaw. It also looks like he has base narrow canines, but again I do not know if this type of growth is normal or not. Does anyone have a similar experience with their Dogo? Is this something that will correct itself?

Occlusion is defined as the relationship between the teeth of the maxilla (upper jaw) and mandibles (lower jaw). When this relationship is abnormal a malocclusion results and is also called an abnormal bite or an overbite in dogs and cats.

It is important that the horse"s incisor bite be checked with the head in the normal resting position and not raised up high. Raising the head high, or extending the poll joint, will cause the lower jaw (mandible) to slide backwards (caudally) slightly (approx 3- 10 mm). Conversely, when the head is lowered and the poll flexes, the lower jaw (mandible) slides forward.

This backward and forward sliding of the jaw when the head is raised and lowered is knownas Rostro-Caudal Movement (RCM). It is a normal process which is required for normal chewing and comfort to the horse when ridden. So even though most of the jaw movement when eating is from side to side (lateral movement), there is also a small amount of backwards and forwards movement of the lower jaw (RCM).

The condition can result from the top jaw (maxilla) developing too long, or the bottom jaw (mandible) developing too short. Usually it is the lower jaw that is too short. But anything which interferes with the match up of the top and bottom jaws can cause a horse to be parrot mouthed.

The real problems with being parrot mouthed are due to the fact that horses" teeth are hypsodont teeth — that means that they have long crowns up in the bone and continue to erupt or move into the mouth throughout life — up to a point where there is no more tooth left to erupt into the mouth. If they are not opposing another tooth, they continue to erupt into the mouth to a point where they are a problem and dig into the opposite jaw etc.

As the elongating tooth or teeth become more prominent, they may cause the tooth to be moved or forced out of its normal position and they also may restrict the whole jaw"s normal RCM (rostro-caudal movement) whilst eating or when ridden.

When being ridden the hooks and ridges restrict the free gliding movement of the jaw (RCM) during flexion and other changes in head position. Thus these affected horses may be not as light in the mouth as they should be during collection, or they may work behind the bit, or they may have a bad head toss at transitions.

The floating must be certain to address the associated overgrowths of teeth which arise and encourage the backwards displacement of the Mandible (jaw). These overgrowths include lipping of the incisors, hooks on the cheek teeth and excessive transverse ridges on the cheek teeth. Obviously the sharp enamel points must also be addressed.

The results of these orthodontic techniques are more functional than cosmetic, and there are possible side effects. The wiring requires many general anaesthetics as the jaw grows, so the orthodontic wiring programme becomes quite expensive and will need to continue for months to years. It needs to be commenced when the foals are young, but the foal needs to be able to eat creep feeds such as pellets and chaff.

“Other animals with an overshot jaw have difficulty grasping food because of misaligned incisors. In horses, incisor malalignment is obvious but not necessarily a significant problem, because they are capable of seizing food with their lips. The major concern is the potential development of cheek-teeth disorders that inhibit their ability to chew,” shared Kathleen Crandell, Ph.D., an equine nutritionist for Kentucky Equine Research.

Foals with an overshot jaw are therefore at risk of malnutrition, slow growth, and the development of additional dental problems. For example, lack of contact between the upper and lower incisors can result in overgrowth of incisors and cheek teeth, known as premolars. In addition, this lack of contact may trap the lower incisors behind the upper incisors, potentially contributing to the lack of lower jaw growth, which exacerbates the condition as the foal grows.

The most common jaw deformity is parrot mouth, in which the maxilla (upper jaw) extends beyond the mandible (lower jaw). In contrast to a parrot mouth, monkey or sow mouth indicates a condition in which the mandible extends beyond the maxilla. Monkey mouth is less common than parrot mouth. Both conditions are thought to be inherited.

Because malocclusions are thought to be passed from one generation to the next, the teeth of mares and stallions showing in conformation classes are frequently examined by judges. Presence of a malocclusion is often reason enough for a horse to be excused from a class. For example, the American Quarter Horse Association (AQHA), which is the largest breed organization in the world and sanctions thousands of shows annually, considers the fault an undesirable trait. Judges officiating at AQHA-approved events are instructed to dismiss from the ring any mare or stallion that has an overshot or undershot jaw.

Q. after dinner my daughters jaw swelled up on one side and hurts her, so does her neck on that side. What does this mean? she is 9, no fever or any other ill effects, just the pain