Dentosphere : World of Dentistry

 # Drug of choice in pneumocystis carinii pneumonia: a) Pentamidine b) Zidovudine c) Ciprofloxacin d) Cotrimoxazole The correct answer is D. Cotrimoxazole. Legionnaire's pneumonia -Pneumonia in association with high fever, confusion and diarrhea suggests Cotrimoxazole, Clindamycin - Drug of choice for atypical pneumonia caused by pneumocystis carini Clarithromycin, Flucloxacillin - Drug of choice for community acquired pneumonia Gram negative bacilli - Most common micro organisms isolated from the patients with nosocomial pneumonias Mycoplasma, Chlamydia, pneumocystis carinii and viral infections  -Causes of atypical pneumonia Streptococcus pneumonia (or) Pneumococcus pneumonia - Most common cause of community acquired pneumonia is Doxycycline, Erythromycin - Drugs used for treatment of atypical pneumonia caused by Chlamydia Erythromycin, Clarithromycin - Drug of choice for atypical pneumonia caused by mycoplasma CLICK HERE FOR MORE MCQs

 # Cyanosis is seen if: a) Meth Hb 1.5gm% b) Sulf Hb 0.5gm% c) Reduced Hb 5gm% d) All of the above The correct answer is D. All of the above. Types of cyanosis - Central  - Peripheral - Cyanosis due to abnormal pigments (methemoglobin, sulfhemoglobin) - Mixed CENTRAL CYANOSIS Mechanism : Diminished arterial oxygen saturation Sites : On skin & mucous membranes Eg.: Tongue, lips, cheeks Temperature of the Limb Warm PERIPHERAL CYANOSIS Mechanism : Diminished flow of blood to the local part Sites : On skin only Temperature of the Limb Cold

 # A thin bluish line around the gingival margin is due to the absorption of :  A. Silver  B. Mercury  C. Drugs like tetracycline  D. Lead The correct answer is D. lead. Heavy metals cause gingival pigmentation in areas of inflammation only, where the increased permeability permits the seepage of metal into the surrounding tissue. Lead Line (Burtonian Line) --- Bluish red or deep blue linear pigmentation in marginal gingiva Silver (argyria) --- Violet marginal line Bismuth, arsenic and mercury --- Black marginal line Mesenteric line --- Delicate, brown or black pigmented non cariogenic plaque found on the enamel at the cervical margin of the tooth CLICK HERE FOR MORE MCQs

 # Plasma cell gingivitis is seen in individuals having the habit of chewing of the following types of flavored chewing gum? A. Peppermint flavored B. Clove flavored C. Cinnamon flavored D. Banana flavored The correct answer is  C. Cinnamon flavored. PLASMA CELL GINGIVITIS - The gingiva appears red, friable, granular, and bleeds easily.  - It may be associated with cheilitis and glossitis. - Plasma cell gingivitis is a contact hypersensitivity reaction most frequently attributed to Cinnamon flavored chewing gum.  CLICK HERE FOR MORE MCQs 

 # Gingival manifestation is seen maximum with:  A. AML B. CLL C. CML D. ALL The correct answer is A. AML. Gum hypertrophy due to leukemic infiltration of the gingiva is a frequent finding in: - M4: Acute myelomonocytic leukemia (Naegeli type) - M5: Acute monocytic leukemia (Schilling type) Incidence of gingival enlargement is highest in acute monocytic leukemia (66.7%), followed by acute myelocytic monocytic leukemia (18.7%) and myelocytic leukemia (3.7%). Leukemic gingival enlargements are not found in edentulous patients or in chronic leukemia. Leukemic gingival enlargement occurs only in acute type and not in chronic leukemia. It occurs mostly in acute monocytic leukemia. The gingival connective tissue is infiltrated with immature leukocytes. CLICK HERE FOR MORE MCQS

# Which of the following cannot be used to block undercuts intraorally? A. Addition silicon B. Plaster of Paris C. Irreversible hydrocolloid D. Temporary restorative material # Inability of a material to sustain plastic deformation before the fracture occur: A. Toughness B. Hardness C. Brittleness D. Critical Stress   

  When 30-50% of the upper teeth protrude over the lower teeth, an overbite occurs. Many reasons contribute to overbite problems in children. In this article, let’s first understand the types of overbite problems that exist, what are their causes and how they can be treated.     Types of Overbites They are of two types: Vertical overbite: The top teeth significantly overlap the bottom teeth       Horizontal overbite: The top teeth protrude over the bottom teeth   Overbites are also categorized as dental or skeletal in nature.   ·          In dental overbites, the teeth cause the overbite to form. ·          In skeletal overbites, the jaw is responsible for the overbite to occur.   The overbite teeth problem is the most common type of bite problem and occurs due to a lot of reasons. Let us delve into some:   Causes of Ov...