Description : The sterilisation of Gutta Percha is achieved by: A. Heat B. Chemical sterilisation C. Flame D. Boiling E. Autoclave
Last Answer : B. Chemical sterilisation
Description : Which of the following procedures will not achieve sterilization: A. Hot air at 160ºC for 90mins B. Boiling water at 100ºC for 2 hours C. Autoclave at 121ºC under 15psi for 20 mins D. Dry heat at 177ºC for 60mins E. All of the above will achieve sterilisation
Last Answer : B. Boiling water at 100ºC for 2 hours
Description : The term TUGback is related to ( “When used in connection with a master Gutta Percha cone in endodontics)” : A. Tensile strength of the gutta percha B. Consistency of gutta percha C. Size of the cone D. Fit of the cone in the apical 1 or 2 mm E. Length of the cone
Last Answer : D. Fit of the cone in the apical 1 or 2 mm
Description : The obturating material of choice for primary teeth following complete pulpectomy is, A. Zn phosphate cement and formcresol combination paste B. Quick setting hydroxide cement C. Zinc oxide and eugenol cement D. Gutta-percha E. Polycarboxylate cement
Last Answer : C. Zinc oxide and eugenol cement
Description : On an X ray you find the Gutta Percha cone extending 1mm beyond the apex without any symptoms, what would you do: A. Remove restoration material until you are able to withdraw the Gutta Percha cone B. Apiectomy C. Leave as is until any complications occur
Last Answer : C. Leave as is until any complications occur
Description : The method you will use to fill root canal of maxillary lateral incisor is: A. One major Gutta Percha cone B. Laterally condensed C. Laterally above condensed
Last Answer : B. Laterally condensed
Description : The technique of placing guttapercha cones against the root canal walls providing space for additional guttapercha is termed: A. Lateral Condensation B. One major Gutta Percha point C. Laterally above condensed
Last Answer : A. Lateral Condensation
Description : Gutta percha rubber is (A) Soft & tacky at room temperature (B) An isomer of natural rubber (C) A thermosetting resin (D) Recovered by coagulation of rubber latex
Last Answer : (B) An isomer of natural rubber
Description : What is the mode of action of autoclaving “Moist sterilisation”: A. Moist heat sterilization B. Protein denaturation
Last Answer : A. Moist heat sterilization
Description : Which of the following is not increased by using preheated combustion air in place of ordinary air at room temperature? (A) Calorific value of the fuel (B) Flame temperature achieved (C) Speed of combustion of fuel (D) Heat transfer rate to the stock in the furnace
Last Answer : (A) Calorific value of the fuel
Description : A crown casting with a chamfer margin fits the die; but in the mouth the casting is open approximately 0.3mm. A satisfactory fit and accurate physiological close of the gingival area of the crown ... the crown E. Relieving the inside of the occlusal surface of the casting to allow for further
Last Answer : D. Making a new impression and remaking the crown
Description : In melting gold, which part of flame willl you use, A. Reduced zone B. Oxidizing zone
Last Answer : A. Reduced zone
Description : Prolonged GIC setting time can be achieved by, A. Cool down the slab B. Increase the amount of distilled water
Last Answer : A. Cool down the slab
Description : A long iron rod initially at a temperature of 20°C has one end dipped in boiling water (100°C) at time, t = 0. The curved surface of the rod is insulated so that heat conduction is one dimensional in the axial direction. The ... = 283 s (B) t = 356 s (C) t = 400 s (D) t = 800 s
Last Answer : (D) t = 800 s
Description : Sensitivity to hot and cold foods soon after cavity preparation and placement of GIC and composite resin in an upper incisor tooth is due to: A. Mechanical trauma due to cavity preparation B. Chemical C. Heat from GIC settings
Last Answer : A. Mechanical trauma due to cavity preparation
Description : What is TRUE: A. Boiling point of acrylic acid > boiling point of water B. Boiling point of acrylic acid is similar to that of water C. Boiling point of acrylic acid < boiling point of water
Last Answer : B. Boiling point of acrylic acid is similar to that of water
Description : As part of a voluntary sterilisation, would it be immoral to harvest human eggs and sell them as human caviar?
Last Answer : And what about human “rocky mountain oysters”?
Description : Assertion : Vasectomy is considered in permanent sterilisation method in male . Reason : It show immediate sterilisation after procedure .
Last Answer : Assertion : Vasectomy is considered in permanent sterilisation method in male . Reason : It show immediate ... . If both Assertion & Reason are False.
Description : Tubectomy is a method of sterilisation in which (a) small part of the fallopian tube is removed or tied up (b) ovaries are removed surgically (c) small part of vas deferens is removed or tied up (d) uterus is removed surgically.
Last Answer : (a) small part of the fallopian tube is removed or tied up
Description : Infective bacteria in water is killed by the __________ process. (A) Sterilisation (B) Aeration (C) Disinfection (D) None of these
Last Answer : (A) Sterilisation
Description : __________ is the process of killing organism in water. (A) Coagulation (B) Sterilisation (C) Disinfection (D) Sedimentation
Last Answer : (C) Disinfection
Description : Define sterilisation and classify methods of sterilisation.
Last Answer : Definition: Sterilizations is the process of complete destruction of all microorganisms along with their spores present in the system. Methods of sterilization: I. Physical methods: 1. Dry heat ... . Seitz filters 3. Sintered glass filters 4. Sintered metal filters 5. Membrane filters
Description : Classify the methods of sterilisation with example.
Last Answer : Method of sterilization :- A)Physical method Dry heat sterilization e.g. hot air oven Moist heat sterilization e.g. Autoclave Radiation sterilization a) Use of ultra violet rays ... Ceramic filters Seitz glass filter Sintered glass filters Sintered metal filters Membrane filters
Description : Why do you itch enamel for composite restorations: A. To increase surface area B. To decrease surface area C. Does not really change the surface area D. Increase the chemical bonding capability E. Decrease the chemical bonding capability
Last Answer : A. To increase surface area
Description : A major difference between light cured and chemical cured composite is that during setting or in function the light cured material tends to:******** VERY IMP A. Seal the margins better and ... on time C. Undergo greater colour change D. Shrink more rapidly E. Posses greater fracture toughness
Last Answer : D. Shrink more rapidly
Description : Trichloroacetic acid, a strong acid, has been used by dentists for chemical cautery of hypertrophic tissue and aphthous ulcers; its mechanism of action is, BOUCHERS P 194 A. Thermodynamic ... Activation of tissue enzymes C. Osmotic pressure D. Protein precipitation (PPT) E. Neutralization
Last Answer : D. Protein precipitation (PPT)
Description : Pick out the wrong statement. (A) 'Solvates' are chemical compounds formed by solute with their solvents. When water is the solvent, then it is called a 'hydrate' (B) In heat exchanger ... vertical evaporators, area of central downtake is about 50 to 100% of the total tube cross-sectional area
Last Answer : (C) Heat transfer co-efficient during nucleate boiling is not influenced by the agitation imparted
Description : Can darts be sterilized in an autoclave?
Last Answer : I think they would get sterilized yes but I wouldn’t put darts that have any other parts but metal into an autoclave (also you’ve got kinky and pleasure in your topics next to darts and autoclave…now there’s an interesting combination)
Last Answer : Autoclave On the machine 121 degrees At temperature Disinfectant To do Is.
Description : What is the Different between oven and autoclave?
Last Answer : Need answer
Description : How many days will expire the sterilized instruments of sirona autoclave?
Description : Urea autoclave is made of (A) Cast iron (B) Refractory blocks (C) Stainless steel (D) Lead lined steel
Last Answer : (C) Stainless steel
Description : The composition of fresh feed to the high temperature, high pressure urea autoclave is (A) Excess liquid ammonia and liquefied CO2 (B) Excess liquid ammonia and compressed CO2 gas (C) Liquid ammonia and excess compressed CO2 (D) Compressed ammonia gas and excess compressed CO2
Last Answer : (B) Excess liquid ammonia and compressed CO2 gas
Description : Temperature and pressure in urea autoclave is (A) 120°C and 300 atm (B) 190°C and 200 atm (C) 400°C and 550 atm (D) 200°C and 10 atm
Last Answer : (B) 190°C and 200 atm
Description : A reactor is generally termed as an autoclave, when it is a (A) High pressure batch reactor (B) Atmospheric pressure tank reactor (C) High pressure tubular reactor (D) Atmospheric pressure CSTR
Last Answer : A) High pressure batch reactor
Description : An autoclave normally sterilizes material by heating the material to_____°C for minute‘s at__________ psi. a. 100; 10 30 b. 121.5; 15; 15 c. 100; 15; 0 d. 110; 30; 5
Last Answer : b. 121.5; 15; 15
Description : The reaction A (l) → R(g) is allowed to reach equilibrium conditions in an autoclave. At equilibrium, there are two phases, one a pure liquid phase of A and the other a vapor phase of A, R and S. Initially A alone is present. The numbers of degrees of freedom are: (A) 1 (B) 2 (C) 3 (D) 0
Last Answer : (B) 2
Description : What is the recommended time and pressure for sterilization of media using an Autoclave A 15 min 10 lbs B 60 min 5 lbs C 15 min 15 lbs D 15 min 20 lbs
Last Answer : C 15 min 15 lbs
Description : With a well labeled diagram explain the construction of Autoclave.
Last Answer : Construction: It consists of a strong metallic chamber usually made of stainless steel. It has a cover fitted with a steam vent, pressure gauze and a safety valve. Rubber gasket is ... inner chamber is place on the stand. The material to be sterilized is loosely packed into it.
Description : Describe construction of autoclave with diagram.
Last Answer : Construction: It consists of a string metallic chamber usually made of stainless steel. It has a cover fitted with a steam vent, pressure gauze and a safety valve. Rubber gasket is fitted on the inner side ... the stand. The material to be sterilized is loosely packed into it. Diagram:
Description : Give principle, working and use of autoclave
Last Answer : Principle: Moist heat sterilization is a method of sterilization in which steam is used for sterilization. The steam has more penetration power and more thermal capacity than dry heat. ... by autoclaving. o Used for sterilization of a majority of official injections and eye drops.
Description : Porcelain must not be contaminated by handling between which two stages: A. Pre-soldering and heat treatment B. Heat treatment and opaque /bake/ stages C. Opaque and bisque stages D. Bisque and glazing stages E. First opaque bake and second opaque bake
Last Answer : A. Pre-soldering and heat treatment
Description : What is the cause of the apical periodontitis after extirpation and instrumentation and temporarely dressing. a. entrapped Bacteria. b. Chemical irritation of the solutions. c. Mechanical irritation of the instruments. d. One or any combination of the above.
Last Answer : d. One or any combination of the above.
Description : Generalised loss of tooth structure by chemical means called, A. Erosion B. Attrition
Last Answer : A. Erosion
Description : The effectiveness of the acid etch is dependent on which of the following factors: A. Material must be used to clean the surface of the tooth prior to etching B. The effectiveness of the itchant C. The chemical and physical nature of the tooth D. The area and surface of the enamel to be itched
Last Answer : C. The chemical and physical nature of the tooth
Description : Which of the following factors can affect the shape and size of the pulp canal: A. Chemical irritation and caries B. Trauma and function C. Attrition, wear and aging of the patient D. All of the above
Last Answer : D. All of the above
Description : Attrition is,v A. Process of normal wear of teeth B. Lost of teeth substance as a result of chemical exposure
Last Answer : A. Process of normal wear of teeth
Description : Gibbs free energy per mole for a pure substance is equal to the (A) Latent heat of vaporisation (B) Chemical potential (C) Molal boiling point (D) Heat capacity
Last Answer : (B) Chemical potential
Description : Throbbing pain increases with heat and cold stimuli, the MOST probable diagnosis is, A. Cyst B. Occlusal trauma C. Advanced pulpitis
Last Answer : C. Advanced pulpitis
Description : The effect of the temperature rising above 100ºC on heat-cured denture-base acrylic resins is: A. Produces porosity on the external portion of the resin. B. Produces porosity on the internal portion ... porosity on the surface of the resin. D. Prevents porosity on the interior of the resin
Last Answer : B. Produces porosity on the internal portion of the resin.