Dentosphere : World of Dentistry

# Cementum : A. Is derived from the sheath of Hertwig B. Is acellular in the apical third of the tooth C. Often overlaps the enamel D. Does not contain collagen fibers # Cellular cementum and compact bone contain : A. Sharpey's fibers and elastic fibers B. Collagen fibers and blood vessels C. Canaliculi and incremental lines D. Lacunae and elastic fibers

# During inspiration when the diaphragm contracts, the intrapleural pressure becomes: A. More negative B. Less negative C. Positive D. Equal to the intra-alveolar pressure # A decrease in the arterial pO2 is seen in: A. Decrease in hemoglobin concentration of arterial blood B. Paralysis of inspiratory muscles C. Sluggish blood flow D. High altitudes

  Click HERE to view all our MCQ Topics. # The inferior dental artery is a branch of the : A. Mandibular artery B. Maxillary artery C. Pterygomandibular plexus D. None of the above # The middle meningeal artery : A. Enters the skull through the foramen ovale B. Supplies the superolateral surface of the ipsilateral cerebral hemisphere C. Runs a subdural course within the cranial cavity D. Gives an interior branch which runs deep to the pterion

After a week long Problem Based Learning(PBL)  Program Conducted, a seminar was conducted dividing the various topics related to dental caries amongst six different group. Our group was allocated the topic " Restorative Materials in Dental Caries" .

# Which of the following lesions are seen in Von recklinghausen's disease of skin ? A. Hemangioma B. Ameloblastoma C. Neurofibroma D. Giant cell fibroma # In which of the following conditions pulsations or murmur may be detected ? A. Capillary hemangioma B. Osteogenic sarcoma C. Epidermoid carcinoma D. Osteoid osteoma # Hereditary hemorrhagic telangiectasia is seen commonly on : A. Lips B. Buccal mucosa C. Tongue D. Palate

Every year second year BDS students of B.P. Koirala Institute of Health Sciences, Dharan  are given an opportunity to present on specified topics related to Oral Anatomy and Histology with a goal of honing their presentation skills and boosting their confidence. The Seminar topics were provided by the Department of Oral Pathology, College of Dental Surgery. The presentation files of the Seminar can be downloaded by clicking on the respective topics.

Imagine a single day when you had forgotten to brush after two consecutive meals. Remember that feel of rough texture of your own tongue over your teeth and that sensation of your own bad breath. How would our life become if we did not have this magical product formulated till today? Could we enjoy the close-up breathy talks or make our beloved ones feel special by kissing them? Let’s forget kissing! I doubt whether we will be comfortable even to talk face to face.

Dentistry is a science which requires a great knowledge required for diagnosing the clinical problems accurately and framing a treatment plan which best fits the requirement of patient. The dentist should be well aware about the physical and chemical properties of the material that is being used in the intraoral as well as extra oral environment of the patient. Many tools and materials are needed in dental practice which seem too vast to learn about and use them appropriately.  As a first year or a second year dental student, you might be disinclined to study about the dental materials. “Why on earth do we have to study about these compositions of cements and the amalgam when we even don’t know their use?”

Every one of us might have experienced time and again that we are too close to the upcoming exam to prepare well for it. When there is plenty of time, we often keep on procrastinating. Even the things which we are not interested about start becoming more interesting and we lose our time simply doing nothing. This time pressure is especially seen in medical and dental students who have to take hours long lectures daily along with the laboratory exercises and case studies to complete. The assignments and seminars on the top of that makes everybody feel like it is never possible to prepare thoroughly for the exams. But that is not always the case. Those academic achievers are also like us and they also feel the same way about the time constraint. What makes the difference is that they study effectively as compared to others that makes them “The Outliers”.

Few decades after its development in France in the 1800s, the controversy regarding the safety of dental amalgam instigated because mercury is the key element in dental amalgam. Considering the toxic effects of mercury to the human health as well as to the environment, its use as a dental restorative material has declined over years.   Mercury toxicity is a concern in dentistry because mercury and its chemical compounds are toxic to the kidneys and the central nervous system. The most significant danger is from mercury vapor.

Whether it’s a short respite from your work on a hot summer afternoon or a meeting with your college friend after many years, carbonated soda drinks are essentially one of the drinks you consume. Some of the few to name are: Cocacola, Fanta, Sprite, Pepsi, Mountain Dew , Mirinda, etc. These go harmoniously with any casual fast foods like mo:mo: , chowmein, pizza, burger, etc. So, it’s not absurd if you find yourself drinking 2-3 drinks daily on a regular basis. But, you might want to know few things about these so called soft drinks, because they are necessarily not as soft as you might have assumed

Anatomy 1. The taste buds, composed of modified epithelial cells, in tongue have a varied distribution. In which part are these buds most numerous?? Foliate Papillae Fungiform Papillae Vallate Papillae Central region of the dorsum of tongue 2. The infrahyoid group of muscles includes sternohyoid, sternothyroid, thyrohyoid , and omohyoid muscles. Which one of these muscles is supplied by fibers from the first cervical spinal nerve only? Sternothyroid Sternohyoid Thyrohyoid Omohyoid

1. The immobility produced by by general anesthetics in response to painful surgical stimuli is primarily due to their action on: Motor cortex Basal ganglia Thalamus Spinal cord 2. The minimal alveolar concentration(MAC) of an inhalational anesthetic is the measure of its: Potency Therapeutic index Diffusibility Oil:water partition coefficient

1: The part of nephron least permeable to water is? Proximal Tubule Descending limb of Loop of Henle Ascending limb of loop of Henle Collecting Tubule 2. Tubular maximum for glucose is? 180 mg/dl 325 mg/dl 375 mg/min 375 mg/dl

1. Which of the following is not secreted by pituitary gland? Prolactin MSH Oxytocin ACTH 2. Which of the organs are capable of releasing hormones? Endocrine gland Brain Heart Liver All of the above

1.The first permanent tooth to erupt in the oral cavity is the: Mandibular central incisor Mandibular First Molar Maxillary Central Incisor Maxillary First Molar 2. The age of a child having 12 permanent and 12 deciduous teeth is:? Four and half years Eight and half years Eleven and half years Thirteen years Fourteen years

# The most common side effect of the oral administration of ampicillin is :  A. Anaphylactic shock B. Diarrhoea C. Oral Candidiasis D. Renal failure # Which of the following drugs is likely to damage the eighth cranial nerve when administered for a long period of time ? A. Ethambutol B. Isoniazide C. Rifampicin D. Streptomycin

1.When is sex of an individual determined? At the time of conception Fourth week of development Eighth week of development Last trimester of pregnancy 2. The fetal sertoli cells start producing anti mullerian hormone (AMH) at about seventh week of gestation in: Female fetus Male fetus Both male and female fetus AMH is not secreted by fetal sertoli cells

1.A prepared cavity is best protected from moisture by: Cotton rolls Saliva ejector Rubber dam Paper napkin 2. Retentive grooves in the proximal box of a class II amalgam cavity should be: Sharp and elongated at the dentinoenamel junction Round and elongated in the dentin Round and short in the dentin Sharp and elongated in the dentin