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Background. Methyl methacrylate (MMA) is one of the widely used organic monomers in dentistry. It may cause multiple adverse reactions, ranging from allergic reaction to systemic toxicity. Dentistry students are exposed to MMA in an acute manner; however, the concentration of its vapor cannot be estimated well. Objectives. The aim of this study was to evaluate the effect of acute MMA vapor inhalation on the pulmonary function of dental students, both smokers and non-smokers. Material and methods. Thirty-eight male dental students were divided into 2 groups (group 1-smokers and group 2-non-smokers). The lung function parameters of the students were tested with a spirometer during their ordinary training work in a prosthodontics laboratory, before contact with MMA and immediately after it. The lung function test was performed using a standard protocol. The students were asked not to use any perfume or aromatic overlaps for a period of 24 h before starting the tests. Results. The researchers noted a statistically significant decrease (p ≤ 0.05) in forced vital capacity (FVC), forced expiratory volume in 1 s (FEV1), peak expiratory flow (PEF), forced expiratory flow at 25-75% of the pulmonary volume (FEF25-75), and forced expiratory flow at 25% (FEF25) and 50% (FEF50) of the pulmonary volume in smokers and non-smokers by comparing the pre-and post-work tests. Conclusions. Acute inhalation of MMA vapor induced a moderate restriction of pulmonary function in dental students, both smokers and non-smokers, during their routine prosthodontics laboratory training work. No differences in the results of the pulmonary function tests between smokers and non-smokers were observed.

Aim: Review the most important management of thyroid gland dysfunction. The thyroid is the most important gland is a bilobular structure located on both sides of the trachea. Thyroid functions disturbance most the second common of the endocrine system disorder, it's increased among women it about 5% of the population women have thyroid dysfunction, and about 6% can clinically be detected of the thyroid nodules by palpation. Conclusion: The dentist determined thyroid dysfunction and avoid dental complications result in a dental clinic by taking information also take care about cardiovascular statuses due to some patients suffer atrial fibrillation with anticoagulation therapy, that made need antibiotic prophylaxis before treated. The hypothyroidism Patients sensitive to barbiturates and central nervous system depressants so the drug used for medications very little. The dentist must be given fluoride as a drug as a treatment for hyperthyroidism patients due to the fluoride act to reduce thyroid activity by its ability to mimic the action of thyrotropin (TSH). fluoride linked to thyroid problems. A patient must avoid the effect of fluoride on their thyroid can utilize from fluoride-free Toothpaste like CariFree, an oral neutralizer gel.

Bell's Palsy is one of communal disease of effected to seventh cranial nerve that causes paralysis of one or two side of the face which occur within (72 hours), the etiology unknown but different causes such as psychological, physical condition, viral infection, ischemia of blood vessels, and autoimmune inflammation. The individuals are more susceptible to effected such as pregnancies, severe preeclampsia, obese persons, hypertensive patients, diabetic mellitus, it suspected for both sex male and female, also occur in all age but increase within ages that very important to determined type of treatments . During the clinical examination, the Bell's Palsy patient suffer from weakness of muscle of the face, wrinkling forehead, hyper-acusis blink, the face became asymmetrical and the lip ruck up, the corner of the mouth move upward, the naso-labial folds obliterated, weakness of buccinator muscles that lead to the food stay in labial, buccal vestibule in upper and lower jaw, half of face drooped causes of expression altered severely occur like mask. The aim of review bring attention for determined the etiology of Bell's Palsy, early diagnosis of disease by clinical examination to reach perfect therapy and acceleration recovery time and decreased complete facial paralysis. Conclusion: the authors conclude that it is important to evaluate the drug act to regenerate the nerve and modify the treatment to get effected drug with little symptom, also modification of physical therapy to accelerate healing. Dental management for this patient by motivation of them to maintain oral hygiene and modification dental treatment to return mastication of food, brushing, whistling and using dental prosthesis to restore facial function. Also help the psychological condition of the patient to get positive energy to withstand the disease and get ride.

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