Mercurial Stomatitis

Toxic Stomatitis.

DEFINITION.—An inflammation of the interior of the mouth due to poisoning, especially by drugs, and chiefly by mercury, copper, and phosphorus.

DEFINITION.—An inflammation of the mucous membrane of the mouth, eventually ulcerating, the result of systemic poisoning by the absorption of mercury.

SYNONYMS.—Stomatitis mercurialis; Mercurial ptyalism, Ptyalismus mercurialis; Mercurial salivation, Salivatio mercurialis.

ETIOLOGY—Predisposing and Exciting Causes.—Special vulnerability to the toxic influence of mercury, and special proclivity to inflammatory affections of the mouth and the organs contained therein, are the predisposing causes of mercurial stomatitis. The exciting cause is the absorption of mercury into the tissues of the organism. The susceptibility of healthy adults is much greater than that of healthy children. The susceptibility of adults varies very greatly. Constitutions deteriorated by prolonged disease, undue exposure, and the like are much more promptly influenced in consequence. Tuberculous subjects do not bear mercury well.

Idiosyncratic susceptibility to toxæmia by mercurial preparations is now and then encountered in practice, and instances have been published in which fatal results have ensued, after prolonged suffering, from the incautious administration of a single moderate dose of a mercurial drug.

For example, see in Watson's Practice of Physic a case of furious salivation following one administration of two grains of calomel as a purgative, the patient dying at the end of two years, worn out by the effects of the mercury and having lost portions of the jaw-bone by necrosis.

Until comparatively recent years the most common cause of mercurial poisoning was the excessive employment of mercurial medicines, whether by ingestion, inunction, or vapor bath. Topical cauterization with acid solution of mercuric nitrate is likewise an infrequent, and usually an accidental, cause of the affection. Elimination of the mercury by way of the mucous glands of mouth and the salivary glands proper excites the stomatitis in these instances. An entirely different series of cases occur in artisans exposed to handling the metal and its preparations or to breathing its vapor or its dust. In these instances the poison may gain entrance into the absorbent system by the skin, the mucous membranes of the nose, mouth, and throat, the stomach, or the lungs. No matter what care may be exercised in cleansing the hands, it is often impossible to prevent occasional transference of the noxious material from fingers to throat, or to thoroughly free the finger-tips under the nails. The avocations entailing the risks of mercurial stomatitis comprise quicksilver-mining, ore-separating, barometer- and thermometer-making, gilding, hat-making, manufacturing of chemicals, and exhausting the globes employed in certain forms of electric illumination. The slow absorption of mercury into the bodies of artisans induces in addition serious constitutional nervous disturbances—tremors, palsy, etc.

Med. and Surg. Reporter, Philada., Dec. 30, 1883, p. 734.

SYMPTOMATOLOGY, COURSE, DURATION, TERMINATIONS, COMPLICATIONS, AND SEQUELÆ.—The principal subjective symptoms of mercurial stomatitis are—characteristic fetor of the breath, sore gums and mouth, continuous nauseous metallic brassy or coppery taste, and profuse salivation.

At first the mouth feels parched and painful, the gums tender, the teeth, the lower incisors especially, set on edge. Soon the gums become swollen, and when touched with the tongue seem to have receded from the necks of the teeth, which thereby appear to be longer than usual. The gums feel quite sore when pressed upon with the finger or when put on the stretch by clashing the rows of teeth against each other. This sort of soreness is often watched for in the therapeutic administration of mercurials purposely given to "touch the gums," as an indication that the system is under the influence of the drug. It is, therefore, one of the earliest indications of mercurial poisoning, but if not sought for it may elude attention until after the mouth has become sore a little later. The pain in the mouth is augmented by efforts of mastication and expectoration, and may be associated with pains at the angle of the lower jaw or extending along the domain of the third or of the third and second divisions of the distribution of the fifth cerebral nerve. Mastication of solid food is often unendurable. Constitutional manifestations become evident about this time in increased heat of skin, acceleration of pulse, furred tongue, dry mouth, great thirst, and loss of appetite. The dryness of the mouth does not last long, but is soon followed by hypersalivation, one of the characteristic phenomena of the disorder. The saliva secreted, often acid in reaction, varies greatly in quantity, which is usually proportionate to the severity of the case. It is secreted night and day, sometimes to the amount of several pints in the twenty-four hours—in moderately severe cases to the amount of from one to two pints in that space of time. It is limpid or grayish, mawkish or somewhat fetid, and reacts readily to the simplest tests for mercury. The salivation is almost continuous, sometimes quite so. The patient soon becomes unable to endure the fatigue of constant expectoration, and the fluid then dribbles from his mouth or runs off in an unimpeded slobber. When excessive, the patient's strength becomes rapidly exhausted—in part by impoverishment of the fluids, in great measure from the lack of refreshing sleep.

Meanwhile, the local inflammatory process extends from the gums to the floor of the mouth and to the lips, and thence to the tongue and the cheeks. The salivary glands are in a state of inflammation likewise, but rather in consequence of direct irritation in the elimination of the poison through their channels than by extension of the stomatitis along their ducts. The lymphatic glands of the lower jaw become engorged and tender. Mastication, deglutition, and articulation all become impeded mechanically by tumefaction of the tissues.

In some instances the glossitis is so great that the tongue protrudes, thereby impeding respiration and even threatening suffocation. In some cases oedema of the larynx has been noted, threatening suffocation from that cause. Should the inflammatory process extend along the pharynx to the Eustachian tubes, deafness and pains in the ears will become additional symptoms.

The subsequent progress of unarrested mercurial stomatitis is that of ulcerous stomatitis.

Should gangrene of the mucous membrane take place, there will be great fetor from the mouth, and some danger of hemorrhage on detachment of the sloughs should the process be taking place in the direction of vessels of some calibre. Necrosis of the inferior maxilla entails continuance of the disagreeable local symptoms until the discharge in fragments or in mass of the dead portions of bone.

In the earlier stages of the attack the constitutional symptoms may be sthenic. Fever, cephalalgia, and the usual concomitants of pyrexia, however, soon give way to the opposite condition of asthenia. Exhausted by the excessive salivation, and unable to repair waste by eating or sleeping, the sufferer soon passes into a condition of hopeless cachexia. Those who survive remain cachectic and feeble for a long time—some of them disfigured for life by various cicatrices between cheeks and jaw, by loss of teeth or of portions of the jaw-bone.

The duration of mercurial stomatitis varies with the susceptibility of the patient, the intensity of the toxæmia, and the character of the treatment. Mild cases may get well in a week or two; severe cases may continue for weeks, and even months; extreme cases have persisted for years. Even moderate cases occasionally resist treatment for weeks.

Under the improved therapeutics of the present day mercurial stomatitis almost always terminates in recovery, especially if it receive early and prompt attention. Neglected or improperly managed, it may terminate in serious losses of tissue in gums, cheeks, teeth, and bone, leaving the parts much deformed and the patient in a permanently enfeebled condition.

Erysipelas, metastatic abscesses, inflammations, pyæmia, or colliquative diarrhoea may be mentioned as complications which may prove sufficiently serious to produce death, independently of the virulence of the primary stomatitis.

PATHOLOGY AND MORBID ANATOMY.—Mercurial stomatitis is an ulcerative process attended with an excessive flow of saliva containing mercury. It has a tendency to terminate in destruction and exfoliation of the mucous membrane of the gums and other tissues attacked, and eventually in necrosis of the jaw-bone. The detritus is found, microscopically, to consist of granular masses of broken-down tissue, swarming with bacteria and micrococci, and containing some blood-cells and many pus-cells. In some instances micrococci have been detected in the blood.

The disease usually begins in the gums of the lower incisors, and extends backward, often being confined to one side of the jaw. The gums, first swollen and then livid, become separated from the necks of the teeth. Their edges undergo ulceration. The ulcers are surrounded by fungous margins, pale or red, which bleed on the slightest contact, and some become covered with grayish-yellow detritus. The ulceration extends in depth, destroying the supports of the teeth, so that they become loosened and even detached. The inflammatory process extends to the lips, the cheek, and the tongue, which undergo tumefaction and exhibit the impressions of the teeth in grayish opalescent lines or festoons of thickened epithelium at the points of pressure. The glossitis may become intense. It is almost always present, to some extent, as a superficial or mucous glossitis. Occasionally acute oedematous glossitis has ensued, and such cases sometimes terminate fatally. Ulceration takes place in these structures similar to that which has taken place in the gums. If not arrested, gangrenous destruction ensues, not only in these tissues, but beneath them. Thus, the teeth become loosened, and even detached; the jaw-bones themselves may become bared, necrosed, and in part exfoliated; and the cheeks undergo partial destruction by gangrene. Sometimes the inflammation descends to the larynx, and this may produce oedematous infiltration of the loose connective tissue of that structure. Sometimes it mounts the pharynx and reaches the orifices of the Eustachian tubes. The salivary glands become swollen and discharge great quantities of fluid, as detailed under Symptomatology. The retro-maxillary and submaxillary lymphatic glands become enlarged by inflammatory action.

DIAGNOSIS.—In the earliest stages the inflammation of the gums in mercurial stomatitis cannot be distinguished from that which takes place in other forms of ulcerative stomatitis. The fetor of the breath, however, the profuse salivation, and the chemical reaction of the saliva, together with the history of exposure to mercury, soon place the nature of the case beyond doubt. Similar results following poisonings by copper salts and by phosphorus are differentiated by the history of the special exposure.

PROGNOSIS.—In mild cases the prognosis is favorable, provided further exposure to the cause can be avoided. This holds good almost invariably in cases due to over-medication with mercurials, but is far less applicable to cases in artisans, the result of prolonged exposure to the poisonous influences of mercury and its slow absorption. On the whole, the affection is much less serious than formerly, both because it can, in great measure, be guarded against by proper prophylaxis in risky vocations, and because its treatment has been made much more efficient. In severe cases serious results may ensue despite the most judicious treatment, and convalescence is usually very slow, weeks often elapsing before solid food can be chewed without pain or without injury to the gums.

When death ensues, it may be by asthenia, erysipelas, pneumonia, pyæmia, or colliquative diarrhoea.

TREATMENT.—Mercurial stomatitis may sometimes be prevented by the administration of potassium chlorate during exposure. Mild cases following the administration of mercurials often subside upon mere withdrawal of the drug. Should spontaneous subsidence not take place, the administration of potassium chlorate every few hours, in doses of from thirty to sixty grains or more in the twenty-four hours, soon effects amelioration, which promptly terminates in recovery. The characteristic fetor often ceases within twelve hours' use of this drug. Should the inflammatory manifestations be severe, a few leeches applied beneath the edge of the lower jaw, followed by a poultice enveloping the neck to promote further flow of blood, often affords prompt relief (Watson). Lead acetate (ten grains to the ounce of water) and iodine (half a fluidrachm of the compound tincture to the ounce of water) are useful as gargles and washes. When the result of slow poisoning, elimination of the mercury by sulphur vapor baths and the administration of small doses of potassium iodide are recommended.

Cauterization of the ulcerated surfaces is sometimes serviceable, silver nitrate or hydrochloric acid (Ricord), or chromic acid 1:5 (Butlin, Canquil), being used for the purpose.

Opium in decided doses is indicated for the relief of pain. It may be added with advantage to detergent and disinfective mouth-washes (potassium chlorate, sodium borate, creasote-water, saponified emulsion of coal-tar, tincture of cinchona, tincture of myrrh, etc.), the use of which should form an important part of the treatment. Watson highly recommended a wash of gargle of brandy and water, 1:4 or 5. In severe cases difficulty is encountered in maintaining effective alimentation. When mastication is not impracticable, soft-boiled egg and finely-chopped raw beef may be given. When the patient cannot chew at all, resort is confined to milk, soups, and the juice of beef. Nourishing enemata should be administered, as in all affections where it becomes impracticable to sustain the patient by way of the mouth. Tonics and stimulants are indicated to avoid debility from the excessive salivation and its sequelæ—quinia, coffee, wine, and alcohol, the first, if required, by hypodermatic injection, all of them by enema if necessary.

Glossitis and oedema of the larynx may require the surgical procedures often necessary when they occur under other circumstances.

Other forms of toxic stomatitis hardly require special elucidation.