Dentosphere : World of Dentistry

# At higher CO2 concentration, oxygen dissociation curve of hemoglobin will: A. Move to left B. Move to right C. Become irregular D. Move upwardly The correct answer is B. Move to right Right shift of the curve (decreased affinity of Hb for Oxygen) is caused by the following factors: - High PCO2 - Low blood pH - High body temperature - Increased level of 2,3 DPG (Diphosphorylglycerate or biphosphoglycerate)

# Pneumotaxic center related to respiration is located in: A. Crura Cerebri B. Medulla Oblongata C. Pons Varoli D. Parietal lobe The correct answer is C. Pons varoli. 

# In reference to the Spaulding Classification System for contaminated items, semi critical items should be reprocessed by: A. Immersion in a tuberculocidal disinfectant B. Heat sterilization if the material is heat stable C. Washing with a chlorhexidine gluconate solution D. A spray-wipe-spray technique The correct answer is B. heat sterilization if the material is heat stable. Semi critical items are defined as instruments that do not penetrate soft tissues or bone but are used inside the mouth and contact the mucosa. These instruments must be sterilized after every use or must undergo high level disinfection if they are not heat stable.

# Which of the following types of gloves should be utilized to provide the best protection during the cleaning of dental operatories? A. Vinyl B. Cotton C. Utility D. Latex The correct answer is C. Utility gloves Utility gloves are designed to provide best protection during cleaning of dental operatories.  Utility gloves should be used during cleaning the dental operatories.  Utility gloves are thicker than latex and vinyl gloves.  These have larger cuffs and are designed to handle wastes more easily.  Utility gloves have greater tear strength and are more water resistant. 

# If a chemical agent is produced by a cell and if the agent acts on the same cell, the effect is termed as: A. Endocrine effect B. Paracrine effect C. Autocrine effect D. None of the above # All of the following are autocoids except: A. Histamine B. Eicosanoids C. Serotonin D. Insulin # The following is believed to be a second hormonal messenger in many tissues. A. Cyclic AMP B. Prostaglandins C. Calcium ions D. Adenyl cyclase # Drug receptors for steroids are present in the: A. Nuclear chromatin B. Cell membrane C. Cytoplasm D. Nucleus

# Most deaths due to COVID-19, an infection due to novel coronavirus has occurred till date (23rd March) in which country? A. Russia B. China C. Italy D. USA The correct answer is C. Italy. No. of Deaths till Date. Italy  - 5476 China - 3270 Russia - 1 USA -  458

# Most common neurotransmitter is: A. Dopamine B. GABA C. Acetylcholine D. Norepinephrine The correct answer is : C. Acetylcholine

Hyaline Cartilage Matrix consists of lacunar capsule containing individual chondrocytes. Widely distributed in the body. Surface covered by perichondrium. Type II collagen is found Costal cartilage Articular cartilages of most synovial joints Thyroid, cricoid and arytenoid cartilages, pharyngeal cartilages, parts of nasal septum, epiphyseal plate essential for bone growth Fibrous Cartilage Also called white cartilage. Type I collagen is found. Perichondrium is absent. Highest tensile force. Calcification may occur with age. It is found in symphysis, Intervertebral discs, public symphysis, articular disc of most of the joints and menisci of knee joint. Elastic Cartilage Yellow cartilage. This is similar to hyaline cartilage except that elastic fibres are present instead of type II collagen fibres. Calcification does not occur. It is found in auricle. Wall of the medial part of the auditory tube. Epiglottis, corni...

(2} MDS (Masters in Dental Surgery) A. Eligibility: a. BDS or equivalent from institutions recognized by government of Nepal b. Registered in Nepal Medical Council c. Registered in respective medical council of applicant's own country for foreign candidates d. One year experience e. Candidate should score minimum of 50% (Pass Marks) in the Entrance Examinations conducted by Medical Education Commission for being eligible to be in the merit list. B. Exam Format: a. Single best response type with Multiple choice questions b. Four options (A, B, C, D) c. No. of questions - 200 d. Recall:Understanding:Application - 30:50:20 e. Duration - (3 hours including one-time voluntary toilet break) > To be allowed only after an hour

# For a given population, the number of disease cases are divided by the total number of people. Which of the following rates were calculated? A. Odds ratio B. Prevalence C. Incidence D. Specificity The prevalence of a condition describes the proportion of a population who have acquired a condition. Prevalence proportion is computed by comparing the total number of people affected with a condition against the overall number of people being studied. The result is usually written as a percentage, fraction, or by noting the number of known cases per 10,000 people or 100,000 people. Incidence describes the number of new cases that occurred in a given population within a certain period.

[LI 672]                                          FEBRUARY 2016                             Sub. Code: 4164 FOURTH YEAR B.D.S. DEGREE EXAMINATION PAPER IV – CONSERVATIVE DENTISTRY AND ENDODONTICS Q.P. Code : 544164 Time : Three Hours                                                                         Maximum : 70 Marks Answer All Questions I. Elaborate on:                                                                            ...

[LH 672]                                          AUGUST 2015                                 Sub. Code: 4164 FOURTH YEAR B.D.S. DEGREE EXAMINATION PAPER IV – CONSERVATIVE DENTISTRY AND ENDODONTICS Q.P. Code: 544164 Time : Three Hours                                                                         Maximum : 70 marks Answer All Questions I. Elaborate on:                                                                        ...

[LG 672]                                  FEBRUARY 2015                     Sub. Code: 4164 FOURTH YEAR B.D.S. DEGREE EXAM PAPER IV - CONSERVATIVE DENTISTRY AND ENDODONTICS Q.P Code: 544164 Time: 180 Minutes                                                                Maximum: 70 Marks I. Elaborate on:                                                                                  (2 x 10 = 20) 1.  Define dentin hypersensitivity. Discuss the cause, mechanism and management ...

[LF 672]                                      AUGUST  2014                       Sub. Code: 4164 FOURTH YEAR B.D.S. DEGREE EXAM PAPER IV - CONSERVATIVE DENTISTRY & ENDODONTICS Q.P Code: 544164 Time: 180 minutes                                                              Maximum: 70 marks I.  Elaborate on:                                                                                  (2X10=20) 1.  Define bleaching. Enumerate the materials used and var...

[LE 672]                            FEBRUARY 2014                        Sub. Code:4164 FOURTH YEAR B.D.S. DEGREE EXAM PAPER IV - CONSERVATIVE DENTISTRY & ENDODONTICS Q.P Code: 544164 Time: 180 minutes                                                         Maximum: 70 marks I. Elaborate on:                                                                            (2X10=20) 1.  Classify Pins used in Pin retained amalgam restorations. Write in detail about Self threaded pins. 2.  Enumerate different te...

[LD 672]                                      AUGUST 2013                              Sub. Code: 4164 FOURTH YEAR B.D.S. DEGREE EXAM PAPER – IV CONSERVATIVE DENTISRY & ENDODONTICS Q .P .Code: 544164 Time: 180 Minutes                                                        Maximum: 70 Marks I. Elaborate on:                                                                        (2x10=20) 1. Define obturation, discuss about time of obturation and lateral condensation technique. 2. Classify traum...

[LC 672]                                   FEBRUARY 2013                           Sub. Code: 4164 FOURTH YEAR B.D.S. DEGREE EXAM PAPER – IV CONSERVATIVE DENTISRY & ENDODONTICS Q .P .Code: 544164 Time: 180 Minutes                                                        Maximum: 70 Marks I. Elaborate on:                                                                        (2x10=20) 1. Classify & Write in detail about Operative Hand Instruments. Add a note on Instrument Formula. 2. Describe in detail...

[LB 672]                                       AUGUST 2012                              Sub. Code: 4164 FOURTH YEAR B.D.S. DEGREE EXAM PAPER – IV CONSERVATIVE DENTISRY & ENDODONTICS Q .P .Code: 544164 Time : 180 Minutes                                                                  Maximum : 100 marks Answer ALL questions in the same order. I. Elaborate on:   (2*20=40)                                                              1. Ellis classification of traumatic Injuries. W...

Click on the respective year below to view the Past questions. # FEB 2012 Conservative Dentistry and Endodontics Past Questions # August 2012 Conservative Dentistry and Endodontics past Questions # February 2013 Conservative Dentistry and Endodontics Past Questions # August 2013 Conservative Dentistry and Endodontics past Questions # February 2014 Conservative Dentistry and Endodontics Past Questions # August 2014 Conservative Dentistry and Endodontics Past Questions # February 2015 Conservative Dentistry and Endodontics Past Questions # August 2015 Conservative Dentistry and Endodontics Past Questions # February 2016 Conservative Dentistry and Endodontics Past Questions

FEB 2012   [LA 672]                                                                                  Sub.  Code: 4164 FOURTH B.D.S DEGREE EXAMINATION PAPER IV CONSERVATIVE DENTISTRY AND ENDODONTICS Q .P .Code: 544164 Time: Three hours                                                        Maximum: 70 Marks Answer ALL questions in the same order Draw Suitable diagrams wherever necessary I.  Elaborate on:                                                               ...

# Which of the following accounts for why endodontically treated posterior teeth are more susceptible to fracture than untreated ones? A. Loss of moisture B. Damaged coronal structure C. Plastic deformation of the dentin D. Loss of pulpal vitality The correct answer is B. DAMAGED CORONAL STRUCTURE Endodontically treated teeth have a decreased amount of coronal dentin due to the access preparation necessary for root canal treatment. Loss of coronal dentin alters the internal architecture of the tooth, changing the dispersement of forces in the tooth. The change to the internal architecture put the tooth at higher risk for fracture.

# Which of the following locations would a perforation demonstrate the BEST prognosis? A. Floor of pulp chamber B. Coronal 1/3 of root C. Middle 1/3 of root D. Apical 1/3 of root The correct answer is D. Apical third of root. Apical perforations occur through the apical foramen or the body of the root to form  a new canal. The more apical the perforation, the more favorable the prognosis for the tooth. (except for the coronal perforations)