Características de um material obturador de canais radiculares

FITCH, C.P. Necrosis of the teeth. The Dental Cosmos. 6 (10): 538-540, 1865.

"The term necrosis is derived from the Greek word "nexpow", which signifies "I kill" Necrosis of the teeth may be partial or entire: partial where the pulp is destroyed; entire where the pulp and periodontium are both devitalized. Necrosis affects the animal life, and not the molecular integrity of the tooth, whereas caries destroys both its animal and molecular existence. It is to bone what gangrene is to the soft structures...."

"...The most frequent cause of partial necrosis is the exposure and death of the pulp, however produced. But frequently this condition arises from mechanical injury, destroying the pulp, if not implicating the health of the periodontal membrane. Quite often this condition arises from thermal changes communicated to the pulp from the presence of metallic stoppings. Absorption of the gum and alveolus from the neck and root of the tooth may, and often does, produces its death.

We inquire, can a tooth be rendered serviceable after partial necrosis has taken place? We answer decidedly in the affirmative. What are most efficient means to be adopted to secure this desirable result? Treat pathological conditions in an efficiente manner, in harmony with the laws of development, or, in other words, according to the measure of vitality recognized in these organs -

1st. Remove all irrtating agencies from around and within the tooth.
2d. Restore the lost structure, whether soft or hard, by some non-irritable and indestructible substance.

These positions, thus aphoristically stated, embrace an approximal restoration to normal complexion, by a resort to some bleaching process, by which process, the tooth structure is either relieved of substances within the tubuli of the tooth, or infiltrated by agents which entirely change its color.

The best methods of bleaching teeth I do not propose at this time to consider, but merely to call attention to the fact in passing.

It should be observed that there always exists an imperative necessity of supplying the loss of the pulp with a substance indestructible in its essential elements; non-irritant in its effects upon the contiguous structures; at the same time readily introduced to the apical foramen, and susceptible of being made impervious to fluids throughout the entire canal of the root; with the possibility of removal, if necessary.

Cotton slightly moistened in creosote possesses the above characteristics in an eminent degree.

Having indicated some general lines of thought in diagnois, causes, and treatmente of necrosis, I leave the subject for yours further consideration in the discussions of the evening."