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VII. Translate the following sentences using Complex Subject.

1. Известно, что нижняя челюсть является самой большой костью лица.

2. Считается, что кариес можно предотвратить.

3. Говорят, что первая книга по стоматологии появилась в веке.

4. Известно, что кариес - одно из самых распространенных заболеваний полости рта.

5. Установлено, что пульпит бывает как острым так и хроническим.

6. Оказывается, что правильная чистка зубов уменьшает возможность возникновения кариеса.

7. Считается, что удаление зуба является обязательным в таком случае.

VIII. Read and translate the text.

Alveolar Pyorrhea

Alveolar pyorrhea, chronic destructive periodontal disease, has been understood to be among the diseases with highest morbidity for human. Still its mechanism for development does not seem to have been fully clarified.

Being often complicated with diabetes mellitus, hepatopathia and endocrine dysfunction the disease is considered to be closely related with metabolic disturbances for its onset and process.

In alveolar pyorrhea etiological factors are usually classified as being either local or systemic.

Systemic etiological factors accelerate the clinical symptoms, diminish the effects of local treatment, and make it easy to recur alveolar pyorrhea.

In order to avoid these undesirable disturbances due to systemic factors it is necessary to treat the patient with so-called “systemic therapy”. Hormones such as pituitary, thyroid, and parathyroid are very effective in the well indicated cases. However, systemic channels have been extremely limited and it is often difficult to determine the exact nature of relevant causative systemic factors in individual cases of alveolar pyorrhea.

The salivary gland hormone was proved to have a strong biological action on the mesenchymal tissues of the whole body and especially on the teeth, periodontal tissues and the alveolar bones.

There are two kinds of salivary gland hormones: parotin (extracted from the parotid glands of cattle) and saliva-parotin (extracted from the human mixed saliva).

The injection of the proper dosage of this hormone (parotin) increases the white blood cells in the blood stream, saliva-parotin decreases serum calcium content and accelerates the calcification of the dentine.

Since the salivary gland hormone has such biological actions it could easily be inferred that this hormone will work effectively on alveolar pyorrhea which may mostly be due to the dystrophy of the periodontal tissues.

IX. Answer the questions.

1. What is alveolar pyorrhea?

2. is its mechanism for development fully clarified?

3. What diseases can alveolar pyorrhea be complicated with?

4. How are etiologic factors in alveolar pyorrhea usually classified?

5. What drugs are used in so-called “systemic therapy”?

6. What hormones are effective in the well indicated cases?

7. What hormone was proved to have a strong biological action on the teeth, periodontal tissues and alveolar bones?

8. How does the injection of proper dosage of hormone act?