How to Examine an Animal’s Teeth.—Perhaps the best method that can be applied in examining an animal’s teeth or mouth is by the use of a mouth speculum. There are several different makes on the market, and some can be purchased very reasonably and will give excellent service.
Unnatural Condition and Irritation., Etc., of the Teeth.—After studying the anatomy thoroughly you will be able to see at once any abnormal condition of the teeth or mouth, which are as follows:
Dentition begins at or soon after birth, and continues until the horse is five years old, and the animal suffers more or less during that time. The lower animals do not appear to suffer so much in getting their first teeth, but do suffer when getting their permanent ones, even more, perhaps, than the human being. Hence, we have dentition fever in the horse from three or four up to five years old—there is a weak pulse, impaired appetite, a staring coat, the bowels sometimes costive, and sometimes there is diarrhoea; he is not able to work, and it is hard to say what is the matter, unless the system is affected by the irritation set up by the teeth, for all of the organs appear to be in a healthy state. Such symptoms indicate that the temporary teeth are not being displaced in a proper way. The same applies to cattle. The food passes improperly digested, which may be due to the state of the teeth. It is well in such cases to examine the mouth, and if you find some tooth not properly displaced, the gums swollen, remove it—which you can sometimes do with the thumb and finger, or you may have to use the forceps, which we believe the best. Then give a laxative, feed on soft food, and the animal will soon recover.
Irregular Teeth.—The gums are sometimes irritated in connection with the molar teeth. This irritation extends and affects the pharynx and larynx, and perhaps a severe cough is the result, called a dentition cough. It is often the result of but a slight irritation at the back part of the gums—this cough may not be very severe, but it is troublesome—or the gum may become badly swollen. The best treatment is to scarify it. We find tumors in the upper and lower jaw, perhaps from the imperfect development of the teeth, or from slight injury, irritation, etc. They may or may not be malignant, and are likely to extend and involve the alveoli and bone. If not malignant, and only upon the surface, it is called epulis, and is not very common. If not malignant remove it, and it may do well for some time; it will return, extend and become a hopeless case. The horse frequently suffers from sharp, projecting teeth, which occurs more commonly in old horses, from wearing down the teeth in an uneven manner. They will be sharper on the inner edge of the lower jaw and the outer edge of the upper jaw, which may be from faulty formation. In such cases the animal has difficulty in eating, grinds his food, ejecting it. Perhaps when driving him he carries the head to one side from the bearing of the bit not being the same on both sides. If the teeth are sharp in the lower jaw they lacerate the tongue; if in the upper they lacerate the cheeks. The best remedy for this is the tooth rasp, and there is no necessity for using the mouth speculum. After rasping, feed upon soft food for a day or two. There are more difficult cases where the teeth project to some extent, generally in old horses, due to malformation of the jaw. Sometimes the upper jaw extends over the lower, and a part of the tooth is not worn down properly, and after a time it interferes with mastication, and the animal suffers considerably from irritation. The same appears in the front teeth of the upper jaw, but it is not so serious as the back tooth. The animal may be reduced to a walking skeleton, almost; although the appetite appears good, the food is thrown out. You can detect by examining with the hand, and if it is the last molar tooth it is advisable to place a twitch on the horse’s nose, and using the mouth speculum, then remove the projecting portion of the tooth by means of the molar cutter. After using the molar cutters smooth the cut surface of the tooth with a tooth rasp and feed properly, and he will improve rapidly.
Ulcerated or Caries of the Teeth.—The lower animals do not suffer from this as much as man, for two reasons: their teeth are complicated, and the mode of living. Sweets have a bad effect upon the teeth. Horses rarely suffer from toothache, but they frequently suffer from carious teeth. Caries may commence either on the table surface, root or fang, or even in that which surrounds the teeth; or it may result from a slight injury, as getting a stone, etc., between the teeth when masticating, or it may begin in the fang from improper development of the dentine, which receives its nourishment from the tooth-pulp, and when this is gone, the tooth does not receive proper nourishment, etc.
Symptoms.—In the early stages they are not very plain, but become better developed after a time. The animal will show some irritation while eating. Although he is hungry, and goes ravenously to eating, he will all at once quit masticating, and either holds the food in the mouth or throws it out unchewed. This may be due to a slight irritation of the teeth. He acts something similar to the human being, and these symptoms may be present for some time before well-marked symptoms appear. But in, it may be, six months or a year, certain distinct symptoms appear. If it is in the table surface, the tooth is brittle and wears down more readily and the tooth opposite to it grows longer; he quits or rejects the food, and a peculiar stench or fetor is present. The animal falls off in condition in most cases. When it is in connection with the root or fang it is different. As it extends it involves the other tissues, sets up irritation in the upper sinus of the head, if it is in the lower jaw, as well as the symptoms given, you will, perhaps, notice a slight enlargement which extends down the lower portion of the jaw; sinuses form and pus is discharged. Exercise care and judgment and you need make no great mistakes. I know of horses being destroyed for glanders when only affected with ulcerated teeth.
Treatment.—Remove the tooth—and this is not very easily done, but there are various ways. Open the mouth by means of a mouth speculum, and, if practical, use the forceps. The trouble with the forceps is, they are apt to break the tooth when they are closed upon it too tight. There is a root forcep which can be used in the lower jaw, as the teeth in that are more easily removed than those in the upper jaw; or you may remove by trephining, and then, by inserting a punch, it can be driven out. When you attempt to remove a tooth and it breaks down, it will, in many cases, come away of itself without further treatment. The first and second molars are more difficult to punch out than the others. After treatment keep the animal quiet; feed upon soft food that does not require much mastication. There is a difference in treating the cavity. Some recommend filling it with gutta percha to prevent the food from passing into the sinus. It will sometimes pass into both sinuses; but generally there is no necessity for filling it. If you trephine, it is more needful than in pulling. If food passes into the sinuses then it will be necessary to fill the hole. Sometimes in parrot-mouth the incisors of the lower jaw grow and irritate the mucous membrane of the opposite jaw when it is necessary to use incisor cutters or rasp them down.
Wolf or Supernumerary Teeth.—Wolf teeth are comparatively small in size and have only one root and are found just in front of the upper molar teeth. Sometimes they do harm, but that is an exception and not the rule. They can be easily removed with a pair of small forceps or they may be punched out in some instances, but I prefer that you use the regular wolf tooth forcep as it looks much better to the onlooker. I think they interfere with the eyes, causing them to become watery and inflamed, due to the tooth exerting some influence upon the ophthalmic division of the fifth nerve.
Supernumerary Teeth.—Tooth substance may develop in almost any part of the body. These are called supernumerary teeth and are commonly found in the testicles, ovaries and sinuses of the head, etc.
Foreign Body Lodged in the Mouth.—A foreign body sometimes gets lodged in the mouth, as a piece of wood, wire from the feed, etc., and possibly becomes imbeded between the molar teeth, and the animal is not able to get it out. There will be difficulty in masticating; a flow of saliva; the animal stands with the head poked out, as if suffering from sore throat. He will partially masticate, then try to swallow, and perhaps eject the food. These symptoms are present in sore throat, and it is necessary to make a careful examination; you are not likely to mistake just one case, but if there is some other disease prevalent that presents similar symptoms, then you are liable to make a mistake. As stated before, exercise care and judgment and you need make no great mistakes, this applies to all diseases, etc., that you are called upon to treat.