Dentosphere : World of Dentistry

# T:B lymphocyte ratio in GCF is: A. 1:3 B. 2:1 C. 3:1 D. 1:1 The correct answer is A. 1:3 The ratio of T lymphocytes to B lymphocytes was found to be reversed from the normal ratio of about 3:1 found in peripheral blood to about 1:3 in GCF.  Ref: Carranza's Clinical Periodontology, 12th Edition, Page no 216. CLICK HERE FOR MORE MCQs

#  Posterior vibrating line is at the junction of: A. Levator palatini and tensor palatini B. Levator palatini and muscular portion of the soft palate C. Aponeurosis of levator palatini and muscular portion of the soft palate D. Aponeurosis of tensor palatini and muscular portion of soft palate The correct answer is D. Aponeurosis of tensor palatini and muscular portion of soft palate. Posterior vibrating line It is an imaginary line located at the junction of the soft palate that shows limited movement and the soft palate that shows marked movement. It also represents the junction between the aponeurosis of the tensor veli palatini muscle and the muscular portion of the soft palate. It is recorded by asking the patient to say “ah’ in short but normal nonvigorous fashion. This line is usually straight. CLICK HERE FOR MORE MCQs

 # Guiding planes in cast partial denture: A. Should be perpendicular to the path of insertions B. They must always face each other C. Should be prepared always on the proximal surface of the abutment teeth D. Should be parallel to the path of insertion The correct answer is D. Should be parallel to the path of insertion. Guiding planes or guide planes are defined as “Two or more vertically parallel surfaces of abutment teeth so oriented as to direct the path of placement and removal of removable partial dentures” -GPT. They are prepared on the proximal and axial surfaces of primary and secondary abutment teeth. Structure Guide planes are usually 2-3 mm in occlusogingival height parallel to the path of insertion. The guide planes should be flat and contain no undercuts. Guide planes do not occur naturally on the abutment teeth, instead they should be prepared by the clinician during prosthetic mouth preparation. They are prepared by selective grinding of teeth (enameloplasty) or by...

 KATHMANDU UNIVERSITY University Examination August/ September 2021 Level: BDS                                                                         Subject: Conservative Dentistry and Endodontics Exam: Final BDS (New course) Time: 2 hrs. 30 minutes                                                                                              Full Marks: 50 marks Date August 25, 2021 INSTRUCTION TO THE CANDIDATE Answer each section in a separate answer book Write brief, relevant and legible answers Illustrate your answer with well labelled diagrams wherever required. Al...

 # Ethical principle that require health professionals to fully inform their patients and protect their confidentiality is the principle of: A. Justice B. Autonomy C. Veracity D. Beneficence The correct answer is B. Autonomy.  The 4 main ethical principles, that is beneficence, nonmaleficence, autonomy, and justice, are defined and explained. Informed consent, truth-telling, and confidentiality spring from the principle of autonomy.  CLICK HERE FOR MORE MCQs

 # Oral hygiene was first practiced by: A. Chinese B. Estruscans C. Sumerians D. Sushruta The correct answer is C. Sumerians. Sumerians practiced oral hygiene as early as 3000 B.C. using gold toothpicks. The chinese used chewstick as a tooth pick and toothbrush to clean and massage gingival tissues.  Charaka Samhita stressed on tooth brushing- the stick for tooth brushing should be bitter, pungent or astringent. One of its end should be chewed in the form of a brush and should be used twice daily without injuring gums. Neem chewsticks are still used today The small wooden stick used by Arabs, the end of which was often chewed, the wood fibers being used as a brush - called Siwak or Miswak. CLICK HERE FOR MORE MCQs

 # The term ‘secular trend’ implies: A. Being liberal minded in diagnosing B. Cold professional attitude C. Changes in occurrence over a long period of time D. Migration from rural areas The correct answer is C. Changes in occurrence over a long period of time. Long term or secular trends refers to changes in disease frequency that occurs gradually over long periods of time. Oral cancer is an example of disease which has shown a consistent upward trend during the past years, whereas diseases like tuberculosis, typhoid, polio and diphtheria have shown a downward trend.  CLICK HERE FOR MORE MCQs