Dentosphere : World of Dentistry

#MCQ 10 - In Orthodontics, Porcelain brackets have better esthetics as compared to stainless steel brackets. However, a major disadvantage is: A. Stains over time B. Require special debonding agents C. Removing is difficult and causes enamel cracks D. Channel microfraction while debonding Answer: Removing is difficult and causes enamel cracks "Ceramic brackets are more difficult to debond than steel brackets, and wing fractures may occur easily during debracketing." - Graber Drawbacks of Ceramic Brackets: 1.  The frictional resistance between orthodontic wire and ceramic brackets is greater and less predictable than it is with steel brackets. This unpredictability makes determining optimal force levels and anchorage control difficult. Ceramic brackets with a steel slot insert to reduce friction are therefore more reliable for clinical purposes. 2. Ceramic brackets are not as durable as steel brackets and are brittle by nature. These brackets may brea...

#MCQ 9 - Treatment of Ludwig's Angina due to pericoronitis with respect to lower third molar : A. Incision and Drainage, antibiotics and removal of third molar B. Intubation prior to surgery C. Incision and drainage, removal of third molar, antibiotics D. Tracheostomy should be done before any treatment Answer: D.  Tracheostomy should be done before any treatment The dramatic reduction in the mortality of Ludwig's angina from 54% to 10% in only 3 years, afforded by Williams and Guralnick, was made possible by their changed surgical policy of immediate establishment of airway security by early intubation or tracheostomy, followed by aggressive and early surgical intervention. This dramatic reduction in mortality from 54 to 10 percent was not due to the first use of penicillin in the treatment of these infections. Reference: Peterson's Principles of Oral and Maxillofacial Surgery, 3rd Edition, Page 841 CLICK HERE TO VIEW  ALL MCQS

#MCQ 8 - A dental surgeon has recovered from Hepatitis B after a three months rest. His Laboratory Findings are Normal but he is not allowed to attend to the patients as per the medical board because he is: A. Healthy carrier B. Active carrier C. Convalescent carrier D. Paradoxical carrier Answer: C. Convalescent carrier A carrier is a person who harbors the pathogenic microorganism without suffering from any ill effect because of it. Healthy Carrier - One who harbors the pathogen but has never suffered from the disease caused by the pathogen Convalescent carrier - One who has recovered from the disease and continue to harbor the pathogen in the body Temporary carrier - This state lasts less than 6 months Chronic carrier - This state lasts for several years and even rest of the life in some cases Contact carrier - One who acquires pathogen from a patient Paradoxical carrier - One who acquires pathogen from other carrier CLICK HERE TO VIEW  ALL MCQS

Toothache is a lifetime experience for someone who has experienced the pain of acute pulpitis. Be it sharp, acute, transient pain for seconds or some dull aching, continuous vauge pain in the facial region, tooth pain is really intolerable to ignore. Getting rid of the toothache is the only  thing the sufferer thinks of at the time because, foods look painful, all parties are meaningless if you cannot eat anything, even water ! The type of pain you have is very important to know the condition you might be suffering with. For example, continuous pain that lasts for minutes to hours even after removal of an offending stimulus ( cold, heat, air or some acidic foods) or spontaneous pain without any stimulus often represents irreversible pulpitis, which mandates that you should have a root canal treatment rather than a simple tooth filling. The tooth may seem perfectly fine from outside but there may be a large decay between two teeth which can be seen only on radiographs. Or, your te...

# MCQ 7 # Which of the following tests for tooth vitality assessment has the highest diagnostic accuracy? A. Electric Pulp Test B. Heat Test C. Cold Test D. Anesthetic Test Answer: C. Cold Test The diagnostic accuracy of cold test is 86%, the heat test is 71 % and Electric pulp test is 81%. So, a combination of cold test followed by Electric Pulp Test (EPT) is recommended in a clinical setting. Anesthetic test is done only in patients who are in pain at the time of the test and other tests have failed to identify the tooth causing pain. Reference: Grossman's Endodontic Practice, 13th Edition, Page 72 CLICK HERE TO VIEW  ALL MCQS

# Maximum use of Computers in the field of Dentistry is in the field of: A. Periodontology B. Prosthodontics C. Community Dentistry D. Operative Dentistry Answer: C. Community Dentistry Other branches of dentistry may optionally use computers, but Community Dentistry uses computers extensively for data analysis, storage, transfer and presentation. CLICK HERE TO VIEW  ALL MCQS

# First Water Fluoridation was done in: A. Sweden B. Canada C. Michigan (USA) D. California Answer: C. Michigan (USA) To test the hypothesis that adding fluoride would prevent cavities, Dean and his colleagues conducted a controlled experiment by fluoridating the water in Grand Rapids, Michigan, starting 25 January 1945. The results, published in 1950, showed significant reduction of cavities. CLICK HERE TO VIEW  ALL MCQS