Dentosphere : World of Dentistry

# Which of the following structure is not found in a living pulp ? A. Collagen fibers B. Haversian fibers C. Non myelinated nerve fibers D. Reticulum # The dental pulp contains nerve endings / receptors for: A. Pain B. Pressure C. Proprioception D. Temperature # The dental pulp is derived from : A. Dental papilla B. Dental Sac C. Odontoblasts D. Stellate reticulum # Pulp responds to all stimuli by pain because it has only: A. Free nerve endings B. Krause end bulbs C. Pacinian corpuscle D. Ruffini corpuscle # All of the following are true about functions of dental pulp EXCEPT: A. Formation of dentin B. Nerve supply to dentin C. Sends impulse to CNS D. Nerve supply to enamel through fibers # Odontoblasts are derived from : A. Undifferentiated mesenchymal cells B. Histocytes C. Macrophages D. Lymphocytes # The primary function...

SELECT THE TOPIC YOU WANT TO PRACTICE. # LOK SEWA  AAYOG PAST QUESTIONS Medical Entrance Preparation MCQs # Digestive System and Nutrition MCQs # Reproductive System MCQs # MCQs on Sense Organs # Nervous System MCQs # Cardiovascular System MCQs # Endocrine System MCQs # Assorted Dental MCQs - Part 1 #AIIMS MDS ENTRANCE EXAM YEARWISE COLLECTION *** AIIMS Nov 2001 *** AIIMS Nov 2002 *** AIIMS Nov 2003 *** AIIMS Nov 2004 *** AIIMS Nov 2005 *** AIIMS Nov 2006 *** AIIMS Nov 2007 Part 1 *** AIIMS Nov 2007 Part 2 *** AIIMS Nov 2008  *** AIIMS Nov 2009 *** AIIMS Nov 2010 *** AIIMS Nov 2012 *** AIIMS Nov 2013 *** AIIMS Nov 2014 *** AIIMS Nov 2015 *** AIIMS May 2016 *** AIIMS May 2015 *** AIIMS May 2014 *** AIIMS May 2013 *** AIIMS May 2012 *** AIIMS May 2011 # DENTAL MATERIALS *** Amalgams *** Physical Properties *** Metallurgy *** Impression Materials *** Dental Ceramics and Miscellaneous *** Gypsum Products *** Dental Cements *** Restorative Resin...

Q. Discuss the types of calcification. The mineralisation of body tissues with calcium is a normal physiological process in tissues like bones and teeth, termed as physiological calcification. However, sometimes the visceral tissues and other soft tissues may also get calcified in many diseased states, which is called pathological calcification. In addition to the calcium salts, smaller amounts of iron, magnesium and other minerals may also be deposited. Pathological calcification can be broadly classified into two types: Dystrophic Calcification and Metastatic Calcification. Dystrophic calcification: When the deposition takes place in dead or dying tissues, then it is termed as dystrophic calcification. The serum calcium levels are normal and the calcium metabolism is not deranged. Though hypercalcemia is not a prerequisite for dystrophic calcification, hypercalcemia can exacerbate it. It is seen in areas of tissue necrosis of any type. It is almost always present in the ather...

Q. Mention differences between necrosis and apoptosis. Ans : Though both necrosis and apoptosis are events of cell death, they do differ in various ways. The differences can be observed under following parameters : a) Cell Size The cell is enlarged (swelling) in necrosis whereas the cell is reduced (shrinkage) in apoptosis. b) Fate of Nucleus In necrosis, nucleus undergoes series of changes like pyknosis ( irreversible condensation of chromatin in the nucleus of a cell ) , karyorrhexis (fragmentation of nucleus) and karyolysis (complete dissolution of the chromatin of a dying cell due to the enzymatic degradation). But, in Apoptosis, nucleus undergoes fragmentation into nucleosome size fragments c) Plasma Membrane The plasma membrane is disrupted and is full of leakages in case of necrosis but, it is intact in cells undergoing apoptosis. Only the orientation of lipids in plasma membrane is altered in apoptosis. d) Cellular contents Due to ruptured plasma membrane, ce...

Q. Define Necrosis. Enlist its types with an example of each. Ans: Necrosis is the type of cell death that is associated with loss of membrane integrity and leakage of cellular contents culminating in dissolution of cells, largely resulting from the degradative action of enzymes on lethally injured cells. Types of Necrosis: i) Coagulative Necrosis - underlying tissue architecture is preserved, - affected tissues take on a firm texture - characteristic of infarcts in all of the solid organs except the brain ii) Liquefactive Necrosis - seen in focal bacterial or fungal (occasionally) infections - the dead cells are digested completely, transforming the tissue into a liquid viscous mass - seen often in hypoxic death of cells within CNS iii) Caseous Necrosis (Caseous = Cheese like) - Encountered most often in foci of tubercular infection - friable yellow white appearance of the necrotic region - area of caseous necrosis is often enclosed within a distinctive i...

Poster for Oral Health Awareness : World Oral Health Day 2017 , Designed By: Raman Dhungel, BPKIHS,Dharan, Nepal. FDI World Dental Federation (Federation Dentaire Internationale), has decided to celebrate 20th March 2017 as the world oral health day with a theme "Live mouth Smart". The first World Oral Health Day was celebrated on 20th March 2013 by FDI World Dental Federation. Since then, every year , on 20th March it is celebrated across the globe by organising various campaigns and programs to raise Oral health awareness. The themes for World Oral Health Day till date are: 2013: Healthy Teeth for Healthy Life 2014: Brush for a Healthy Mouth! 2015: Smile For Life! 2016: It all Starts Here. Healthy Mouth. Healthy Body 2017: Live Mouth Smart. Good oral health leads to good overall health. Share the message of World Oral Health Day and spread Oral Health Awareness.

# During the formation of primary teeth: A. Enamel forms more cervically than dentin B. Enamel forms faster than dentin C. Dentin forms faster than enamel D. Processes of their cells remain in content with each other # Matrix vesicles : A. Are found in mantle dentin B. Contain collagen C. Produce alkaline phosphatase D. Inhibit mineralization # Transmission of stimulus across dentin is: A. Direct activation of nerve endings B. Correlated with the innervation density of the dentin C. Stimulus induced fluid flow D. There is no transmission of stimulus across dentin # During hydrodynamic theory movement of fluids in dentinal tubules cause: A. Movement of odontoblasts B. Touch the nerves of the pulp to cause pain C. Minimum effect on odontoblast D. Stimulation of odontoblastic process # Which of the areas of the tooth is most sensitive during cavity preparation : A. Enam...