Oral pathology. Which one of the following vitamins stimulates calcium absorption by the GI tract?

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1 يتكون هذا االختبار من ( 100( سؤال موضوعي من نوع االختيار من متعدد اإلجابة عنها إجبارية. ظمل بقمم الرصاص بشكل Which vitamin is water-soluble? Vitamin A Vitamin K Oral pathology 1 Vitamin D Vitamin B1 Which one of the following vitamins stimulates calcium absorption by the GI tract? Vitamin E Vitamin A Vitamin D Vitamin K One of the following microorganisms is the primary etiology of dental caries: Streptococci mutans Veillonella Dry mouth known as Sialoasis Sialorraoea The most common cause of pulpal diseases is: Bacterimia Dental caries In amelogenesis imperfect the defect occurs in: enamel cementum Congenital absence of all teeth known as: Hypodontia Hyperdontia Dens in dente occurs most commonly in the: Maxillary canines Mandibular second molars Eubacterium Porphyromonas gingivalis Xerostomia Sialadinitis Traumatic injuries Erosion dentine bone Anodontia microdontia Mandibular premolars Maxillary lateral incisors Cysts occurring in the sutures between jaw bones known as: Developmental cysts Radicular cysts Periapical cysts apical cysts An excessive increase in salivary secretions results in a case known as: Sialoasis Sialorraoea Xerostomia Sialadinitis The cells most frequently found in a periapical Granuloma are: غامق الدائرة التي تشير إلى اإلجابة الصحيحة في المكان المخصص لذلك في نموذج اإلجابة المرفق. Mast cells Lymphocytes Giant cells Neutrophils

2 A cyst occurring under the apex of infected tooth (a nonvital pulp), is called a: Radicular cyst Ranula Dentigerous cyst Dermoid cyst The most common benign tumor occurring in the oral cavity is the: Papilloma Fibroma cyst of minor salivary gland known as: Mucocele Sialoasis Adenoma Hemangioma Ranula mumps The most common malignancy found in the oral cavity is: Basal cell carcinoma Melanoma Tumor of the white blood cells (Leukocytes) is called: Leukemia Pancytopenia Transitional cell carcinoma Squamous cell carcinoma Leukopenia The normal platelets (thrombocytes) count in mm 3 is: 50,000-80, , ,000 Benign tumor originates from enamel cells known as: Ameloblastoma Heamangioma Thrompocytopenia 100, , , ,000 Fibroma Osteoma Which one of the following diseases needs urgently a feeding plate early in baby life: Cleft lip Anodontia Mucoceles most frequently occur on the: Upper lip Lower lip Cleft Palate hypodontia Palate Gingivae Dental Materials and Appliances + Dental Ceramics One of the following is non elastic impression material: Polyether Alginate Zinc oxide euginole Polysulfide All of the following are elastomeric Impression Materials except: Polysulfide Silicones Impression compound Polyether 2

3 Gypsum powder used in dentistry in the form of: calcium sulfate hemihydrate Calcium phosphate dihydrate calcium sulfate dihydrate Calcium phosphate hemihydrate The bond between dental porcelain and metal in porcelain fused to metal restorations is: Mechanical only Electrical The most commonly used alloy in partial denture is: Stainless steel Copper alloys Chemical only Chemical and mechanical Cobalt chromium Titanium alloys The most biocompatible material used in dental implant is: Silver Titanium Copper Nickel Dental porcelain is composed of all of the following except: Feldspar Kaolin Most dental porcelain is reinforced with: Copper Alumina The glaze firing: Is the first firing and produces a rough surface. Hydroxyapatite Glass Silver Carbon Is performed prior to adding body porcelain to ensure a rough surface. Is a separate firing and produces a smooth, translucent surface. Is performed on the metal coping to clean the surface of any impurities. Conventionally, polymerization of heat-cure acrylic resin requires heating in a hot-water bath: For 5 hours at 50 C then 3 hours at 100 C For 7 hours at 50 C then 5 hours at 100 C For 5 hours at 70 C then 5 hours at 100 C For 7 hours at 70 C then 3 hours at 100 C Contact eczema usually caused by: Copper constituent of some casting dental alloys Chromium constituent of some casting dental alloys Nickel constituent of some casting dental alloys Cobalt constituent of some casting dental alloys The reaction within the material that can cause distortion is: Strain Stress Contraction Expansion 3

4 The primary purpose for using a vibrator when pouring impressions with model plaster or dental stone is to: Eliminate distortion Eliminate trapped air Help control setting time Help determine proper expansion Casting flux is used to: Prevent contamination of the gold from the asbestos fibers Prevent very rapid melting of gold Prevent oxidation of the metal during melting Prevent air pollution The sprue former must attach to the wax pattern at: Right angle Thickest part of the wax pattern Thinnest part of the wax pattern Should not attach to it Dental casting alloys comprise an essentially corrosion-resistant metal which is usually: Silver Copper The best hygienic finish for ceramic prosthesis is: Using diamond bur on high speed. Using diamond bur on low speed. To glaze the surface. Using white stone on low speed. 4 Gold Ferrous The first layer of porcelian applied to the metal coping is called the: Opaque porcelain. Incisal porcelain. Body porcelain. Porcelain lumina Metal-ceramic restorations may fail due to fracture of ceramic material. This can be best be avoided if: Occlusal forces are minimal. The metal is not over 0.5 mm thick. The ceramic material is at least 1.5 mm thick. The casting is designed to reduce stress concentration in the ceramic material. Which of the following materials causes discoloration of porcelain: Silver Copper Palladium Gold

5 Partial Prostheses The means by which one part of a partial denture framework opposes the action of the retainer in function is called: Tripoding Stress-breaking 5 Reciprocation Direct retention All of the following are treatment options for the partially dentate mouth patients except: Bridges Complete dentures Removable partial dentures dental implants All of the following are components of mandibular removable partial denture except: Occlusal Rest Anterior posterior bar Lingual plate Guiding plate All of the followings are mandibular major connectors except: Lingual bar Sublingual bar Lingual plate Single palatal strap All of the followings are maxillary major connectors except: Anterior bar sublingual bar Anterior posterior bar Single palatal strap In removable partial denture, Unilateral bounded saddle is: Kennedy class V Kennedy class II Kennedy class IV Kennedy class III Who developed the most widely accepted classification system for partially edentulous arches? Skinner Kennedy The function of the reciprocal clasp arm is to: act as a direct retainer for the distal base perform as an indirect retainer Applegate Barlyn counteract any force transmitted by the retention arm stabilize the abutment teeth Two or more parallel axial surfaces of abutment teeth shaped to direct the prosthesis during placement and removal are called: reciprocal clasp arms guiding planes indirect retainers undercuts The part of a removable partial denture that Joins component parts of a denture together is: Connector Clasp Retainer Rest

6 The Components which resist displacement of denture are: Retainers Minor connectors The most rigid palatal major connector is the: Single palatal bar. Palatal horseshoe-shaped connector. Palatal plate. Anterior-posterior palatal bar connector. All of the following are intraoral landmarks except: Hamular notch Retromolar pad Major connecotrs Occlusal rests labial frenum temporomandibular joint Indications for a Removable Partial Denture include all of the following except: To replace several teeth in the same quadrant or in both quadrants of the same arch. As a temporary replacement for missing teeth in a child. To replace missing teeth for patients who do not want a fixed bridge or implants. short span edentulous area Artificial teeth used in RPD Fabricated from: acrylic and Porcelain Porcelain acrylic Stainless steel Reasons for prosthetic replacement of missing teeth include all of the following except: Restore aesthetics and functions Improve distribution of occlusal loads Improve oral hygiene Space maintenance. In cobalt-chromium alloys, the consistuent responsible for corrosion resistance is: Silver Cobalt Nickel. Chromium In removable partial denture, anterior bounded saddle crossing the midline is classified as: Kennedy class V Kennedy class II Kennedy class IV Kennedy class III The denture cleanser that is contraindicated in cleaning the metal denture base is: Alkaline hypochlorite. Alkaline peroxides. Chlorhexidine gluconate. Sulphamic acid. 6

7 In partial denture construction, surveyor should be used: To determine the path of insertion To determine design In conjunction with mouth preparation All of the above Complete denture Prosthetics The distal palatal termination of the maxillary complete denture base is dictated by the: Tuberosity Fovea palatinae Maxillary tori Vibrating line The resistance of a denture to displacement in a vertical direction is: Stability Extension Retention Reciprocation The relationship of denture base to bone that resists dislodgment of the denture in a horizontal direction is: Support Esthetics Retention Stability All of the following are components of a Full Denture except: Base Major connector Flange Acrylic teeth Home Care Instructions for a Full Denture, all are true except: Thoroughly rinse the oral tissues at least once daily. All surfaces of the denture should be thoroughly cleaned with a denture brush. When dentures are not in the mouth, they must be stored in a moist container. Cleaning with hot water Which one of the following landmarks would not be recorded in a maxillary preliminary impression? Tuberosities Buccal frenum Retromolar pads Incisive papilla Which one of the following landmarks would not be recorded in a mandibular preliminary impression? Lingual frenum Hamular notch Retromolar pad Labial frenum The distance between the maxilla and the mandible when the teeth are in maximum inter-cuspation is: Vertical dimension at rest Inter -occlusal space Vertical dimension of occlusion Closest speaking space 7

8 In comparison between porcelain and acrylic teeth, which one of the following statements is wrong? Porcelain teeth are more resistant to wear Porcelain teeth are smoother in surface Porcelain teeth are more expensive Porcelain teeth are easier for selective grinding In the majority of complete denture patients, the normal free way space is: 6-8 mm 2-4 mm mm mm Primary supporting (bearing) areas of the maxilla include: The midline suture and the posterior ridge crest The posterior ridge crest and the horizontal hard palate The incisive papilla region and the posterior ridge crest The anterior ridge crest The process by which the complete denture bases are replaced is called: Repair Copying Relining Rebasing The secondary impression in complete denture construction can be made with all of the following materials except: Alginate Impression compound Elastomers Zinc oxide euginole Reasons for prosthetic replacement of missing teeth include all of the following except: Restore aesthetics Restore functions Restore psychological defect Treat bruxism and occlusal wear Both porcelain and acrylic resin teeth are used in prostheses. Both are secured to the base during processing. Identify the correct anchorage: Both are chemically united with the resin base. Both are held to the base in a mechanical bond. The anchorage of both kind of teeth is both chemical and mechanical. Resin teeth are chemically bonded to the base and porcelain teeth are mechanically held to the base. The incisal guide in the articulator is the: Horizontal guidance Same as the condylar guidance Mechanical equivalent of the curve of spee Mechanical equivalent of horizontal and vertical overlap 8

9 The best stage for handling and packing acrylic resin is: Sandy Dough 9 String Rubbery Which one of the following materials used in polishing the acrylic complete denture: Sodium hypochlorite Cold mold seal Pumic Fluoride gel One of the following is a material for primary impression for construction of acrylic complete denture: Zinc oxide eginol Impression compound The face bow is: Plaster of parits Rubber (Title body) Device relate the relationship between upper jaw and lower jaw Device relate the relationship between lower jaw and hings aixs Device relate the relationship between upper jaw and hinge axis Device relate the relationship between head of the condyle and gleniod fossa Orthodontic Appliances Thickness of wire used in Adam clasp is: 0.4mm 0.5mm Pendulum appliance used for: Molar distalization Canine distalization Adams clasp with a single arrowhead used for: Attachment of elastics Additional retention 0.6mm 0.7mm Molar rotation Maxillery expantion Partially erupted teeth Attachment of face bow Orthodontic force duration that is produced by all patients activated appliances is: Interrupted Continuous To move upper lateral incisor labially we use: Adam clasp Intermittent Heavy continuous 0.5 mm Z spring Ball clasp Robert retractor According to angle, the classification when the lower first molar occlude mesially in relation to upper first molar is: Class I Class II Class III Class IV During orthodontic treatment, indirect bone resorption occurs from: The centre outwards Outwards to the centre Centre and outwards at the same time Laterally to the centre

10 The responsibility of designing removable orthodontic appliance depends on: Dental technician Dental nurse Orthodontist Parents One of the following is an active part of the orthodontic appliance: Adams clasp Base plate Z- spring Ball clasp The properties of an ideal wire material for orthodontic purposes described under these criteria: Low strength range and high stiffness Low formability and high range High strength range and low stiffness High strength range and stiffness Excessive orthodontic forces results in all of the following except: Adjust the position of teeth Root resorption Tooth hypermobility Pulpal necrosis One of the following is a side effect of the functional appliance: Short period of treatment Easily distorted Anderson appliance used in: Class I malocclusion Class III malocclusion Essex retainer used for: Retention after finishing orthodontic treatment Orthodontic movement of upper teeth Orthodontic movement of lower teeth Maintaining space after extraction In colcuring resin, the activator is: Hydroquinone Benzoyl peroxide The highly flexible wires used in: Fixed appliances Springs Franklin IV appliance used to treat: Open bite Class I malocclusion Intolerable by the patient Not easily distorted Class II malocclusion Class VI malocclusion Sodium sulfide A tertiary amine Removable appliances Clasps Class II malocclusion Closed bite 10

11 امتحان الشهادة الجامعية المتوسطة 98. Etiology of malocclusion include all of the following except: Thumb suckling Genetics and orofacial anomalies Tongue thrust Fluorosis 99. One of these is an advantage of spoon denture space maintainers: Very difficult to construct Allow some mesial tipping Allow some distal tipping It restore occlusal function and esthetics 100. Which one of the following give maximum anchorage: Intraoral dental appliances Extraoral appliances Mini or micro screw implants Intraoral dental and extraoral appliances انتهت األسئمة