Dentosphere : World of Dentistry

 # PMA index is used to record the status of: A. Gingival diseases B. Carious teeth C. Root caries D. Periodontal disease The correct answer is A. Gingival diseases. The first dental index, developed by Schour and Massler, was known as a Papilla, Marginal gingiva and Attached gingiva (PMA) Index. Each of those areas was examined and scored from 0 to 5, depending on the severity of inflammation. The PMA Index, largely of historic interest now, was primarily used in surveys of acute gingivitis. The status of a patient’s periodontal health or disease is commonly measured by an index in private practices. CLICK HERE FOR MORE MCQs

 # Prosthesis in which a pontic is attached to a single side retainer via connector is called as: A. Removable fixed partial denture B. Removable partial denture C. Fixed partial denture D. Cantilever fixed partial denture The correct answer is D. Cantilever fixed partial denture. A cantilever fixed partial denture is one that has an abutment or abutments at one end only, with the other end of the pontic remaining unattached. This is a potentially destructive design with the lever arm created by the pontic, and it is frequently misused. Prospective abutment teeth for cantilever fixed partial dentures should be evaluated with an eye toward lengthy roots with a favorable configuration, long clinical crowns, good crown-root ratios, and healthy periodontium. Generally, cantilever fixed partial dentures should replace only one tooth and have at least two abutments. A cantilever can be used for replacing a maxillary lateral incisor. There should be no occlusal contact on the pontic in ei...

 # Which of the following is not used with the surveyor? A. Incisal guide pin B. Analyzing rod C. Carbon marker D. Wax trimmer The correct answer is: A. Incisal guide pin. Incisal guide pin is used with an articulator not a surveyor. Surveying tools- These are tools attached the the madrel of the surveying arm and are used for surveying. They are of different types, e.g. analyzing rod, carbon marker, wax knife and undercut gauges.  Analyzing rod- First tool to be used in surveying. It is more of a diagnostic survey tool. It helps to analyze the location of the height of contours, the presence and absence of favorable and unfavorable undercuts and is used to determine the parallelism of one surface to another. It also helps to arbitrarily determine the path of insertion.  Carbon marker- The resultant line formed by the scribe (carbon marker) is known as a survey line. These survey lines help us in positioning the various component parts of a removable partial denture (RPD)...

# 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...