protesi 1

1. Implantation value of maxillary canines according to Le Riche is: 2. 3. 4. 5.

2. A pressure-polymerised (baro-cured) jacket crown: Has poor colour stability. Has a chromatic appearance similar to natural teeth on all surfaces. Is made only of metal. Cannot be used anteriorly.

3. A sprue former can be made of: Only wax. Only plastic. Wax, plastic or metal. Only metal.

5. Investing the wax pattern of a heat-cured crown: The wax pattern is invested in the upper half of the flask. Investing is only orizontal. Investing is only vertical. No answer is correct.

6. A crown: Should replace the root of the tooth. Should reproduce the morphology of the damaged coronal portion. Cover only the occlusal surface. Replace missing teeth.

7. Casting the dental alloys can be effectuated in: Vacuum. Centrifugal systems. Pressure systems. All answers are correct.

8.Cast metal crowns: According to their bulk, the walls of cast metal crowns may have different thicknesses. If the thickness is uneven, they are called total thickness crowns. If the walls have equal thickness, they are called controlled-thickness crowns.

9. Indications for cast metal crowns are: Anterior teeth for aesthetic purposes. Very small teeth. Teeth with intact crowns. No answer is correct.

10.Casting the models/dies: Is performed using gypsum materials. Requires careful pouring of the impression. Produces working casts for prosthetic procedures. All answers are correct.

11.Technology for obtaining an all-ceramic crown on refractory support: Models used have movable dies. Models have fixed dies. Duplicate impression material is not necessary. No answer is correct.

12.Waxing-up: Adequate interproximal contacts serve to anchor all teeth within the same arch. Adequate interproximal contacts serve to prevent tooth migration or inclination. A correct and adequate wax pattern should preserve the anatomical features of teeth. No answer is correct.

13.Models/Dies: All answers are correct. Obtained from dental stone. Gypsum models can have fixed or removable dies. Gypsum dies with fixed dies present a distal occlusal key in their distal area.

14.Crowns: Are removable prosthetic restorations. Do not have intimate contact with the cervical surface of the prepared tooth. Cover partially or fully the surfaces of the prepared natural tooth. Once placed by the dentist, the patient can remove them.

15.Advantages of bridges: Hygiene and aesthetic. Speech and comfort. Technical execution. Clinical execution.

16.Full coverage ceramic crowns: All answers are correct. Coverying layer of porcelain is very thin. Contraindicated in the prosthetic treatment of tetracycline coloured teeth. Have better aesthetic than the resin jacket crowns.

17. Methods for heat-curing. Processing resin in a constant temperature water bath at 74 degrees for 8 hours or longer with no terminal boiling treatment. Processing in a 74 degrees water bath for 8 hours and then increasing to 100 degrees for 1 hour or hour and a half. Slow polymerisation of the material - 5 hours at 74 degrees. All answers are correct.

18.Casting the model/dies. Water is dispensed into a mixing bowl. Powder is added and allowed to settle into water for 30 seconds. Mixing is possible to be made in the vacuum mixer. All answers are correct.

19.Impression. Realized only with hard impression dental material. Used for register in an exact duplication of the prosthetic field. Not contain all the elements of the prosthetic field. All answers are correct.

20.Preparations for packing/investing of wax pattern of metal crown include. Attaching the casting rod. Modelling the reservoir for the fluid alloy. Realization of the isthmus. No answer are correct.

21.Investing/flasking the wax pattern: Is realised by surrounding the wax pattern with a refractory material. Flasking is the act of investing in a flask of wax pattern. Flask is a metal case or tube used in investing procedures. All answers are correct.

22.Maintaining metal-polymeric bond is obtained. By Van der Waals connections. Only by mechanical retention. Only by chemical adhesion. Combinations of mechanical and chemical forces.

23.Preparation of heat-cured acrylic resin paste. Mixing the liquid with the powder is into a bowl of metal. Initially, mixture looks like a sandy mass. Polymerization reaction is initiated at temperature of 95 degrees. All answers are correct.

23.Advantages of mixed crowns: Preparation of tooth is always biological. Not necessary an accentuated reduction of dental tissue of labial/buccal surface. Can appear separations and infiltrations at the metal-polymer interface. No answer correct.

24.Indications of casted metal crowns are. Apical pathological processes. Teeth with inflammation of marginal periodontium. Tooth and advanced dental mobility. No answer correct.

25.The heat-cured physyiognomical crown/aesthetic brown: Is realised of acrylic resin. Is realised of light-cured resin. Is realised of baropolymerisable resin. Restore the masticatory function of a dental crown.

26.Technology for achievement pressed ceramic core for integral ceramic crowns. Ingots are softened by heat. Softened ingots are pressed into a refractory mould. Not require existence of ceramic ingots.

27.Casting the dental alloys can be effectuated in: Pneumatically operated casting machines. Centrifugal force machines. Mechanical centrifuge.

28.Mixing and introducing the heat-cure acrylic resin in flask. Polymer-monomer ratio is 3:1 by volume. Liquid is mixed with the powder into a bowl of glass or plastic. Resin is a dough stage is pressed into the space/cavity of mould.

29.Attachment of casting rods should be performed. In thinner part of wax up. On occlusal surface at level of guide cusps. On the occlusal surface at level of inactive cusp. Level of neighbour teeth.

30. Implantation values of maxillary canines after Le Riche is: 3. 4. 6. 5.

38. Baro-cured (pressure polymerised) physiognomical (jacket) crown: Is used only for posterior teeth. Has poor colour stability. Has a chromatic appearance almost identical to the natural teeth on all surfaces. Requires metal reinforcement.

39. SPRUE former: Is used only in ceramic technology. Can be of wax, plastic or metal. Can be made only of wax. Has no role in metal casting.

40. Horizontal teeth migration can be: By extrusion. By tilting and translation. By egression. Only vertical.

42. Investing/flasking the wax pattern of heat cured crown: The wax pattern is invested in the upper half of the flask. The wax pattern is invested between two silicone layers. The wax pattern is invested outside the flask. The wax pattern is invested in the lower half of the flask.

42. Crowns. Replace missing teeth. Restore periodontal tissues. Are always removable. Should reproduce the morphology of the damaged coronal portions of a tooth.

43. Casting the dental alloys can be effectuated in: Only centrifugal casting. Only vacuum casting. Only pressure casting. All answers.

44. Indications of casted metal crowns are: High aesthetic demand in anterior teeth. Temporary restorations. Pediatric patients. No answer correct.

45. Casting the models/dies: Requires only soft gypsum. Does not require accuracy. All answers. Is optional.

46. Preparations for packing/investing of wax pattern of metal crown include: Polishing the crown. Modelling the reservoir for the fluid alloy. Attaching the casting rod. Cementation of the crown.

47. Attachment of casting rods should be performed: On the cervical margin. On the lingual surface. On the proximal surface. On the occlusal surface, at the level of a guide cusp.

48. Maintaining the metal-polymeric bond is obtained: Only by chemical forces. Only by mechanical retention. By thermal contraction. Combinations of mechanical and chemical forces.

49. Technology for achievement pressed ceramic core for integral ceramic crown: The layers of the ceramic mass are automatically deposed. The layers of the ceramic mass are partially deposed. Manual stratification of porcelain. Metal casting technique.

50. Models/dies: Are never removable. Are made only of resin. Do not reproduce details. All answers.

51. Technology for achievement integral ceramic crown on refractory support: Uses fixed dies. Does not require duplication. Uses metal frameworks. Use models with movable blunts.

52. Light-cured physiognomical crown: Has low wear resistance. Is contraindicated in all cases. Is always metallic. All answers.

53. Isthmus. Separates ceramic layers. Is part of the crown margin. Consists in the thickening of the rod between the wax pattern and the fluid alloy reservoir. Reduces occlusal load.

55. Waxing-up: Adequate interproximal contacts serve to anchor all teeth within the same arch. Adequate interproximal contacts serve to avoid tooth migration or inclination. Correct wax pattern preserves anatomical features of teeth. All answer correct.

55. The heat-cured physiognomical/aesthetic crown: Is made of ceramic. Is metallic. Is composite only. Is realised of acrylic resins.

56.Advantages of bridges: Difficult hygiene. Reduced comfort. Poor phonation. Speech and comfort.

57. Full coverage ceramic crowns. Are always contraindicated. Are not aesthetic. Cannot be bonded. All answers.

58. Impression. Is used only for study models. Used for registering an exact duplication of the prosthetic field. Does not reproduce tissues. Is optional in fixed prosthodontics.

59. Methods for heat curing: Only water bath. Only microwave. Only dry heat. All answers.

60. Mixing and introducing the heat-cure acrylic resin in flask: Is done without timing. Does not require pressure. Has no stages. All answers correct.

61. Advantages of mixed crowns: Maximum aesthetics without disadvantages. No tooth reduction required. Perfect biocompatibility in all cases. No answer correct.

62. The correct answers about the pontic are: The sanitary pontic is the most physiological. Pontic relation with mucosa in saddle (ridge lap) is physiognomic. Pontic with mucosal relation in the half-saddle ensures better hygiene than saddle. Pontic relation with mucosa in saddle ensures the best hygiene.

63. Totally lack of the periodontal dental units is called: Anodontia. Hypodontia. Oligodontia. Partial edentulism.

64. The FALSE answer about the dental restorations is: Dental crowns are fixed prostheses. Dental bridges are removable. Complete denture are removable prostheses. Implant supported denture can be fixed and removable.

65. The most common form of teeth reductions is: The absence of the second molar. The absence of the third molar. The absence of the lower premolars. The absence of the lateral incisors.

66.The restorations that are not indirect are: Inlays. Fillings. Crowns. Dentures.

67. The correct answers about the veneers are: Are placed on the labial surfaces. The materials used for veneers include only porcelain. Sometimes they may be bonded to a tooth without preparation. Are used only for restore the damaged tooth surface.

68.The Inlay: Is an extra coronal restoration. Is not stronger when compared with direct restorations. Is surrounded by healthy dental tissue. Lies within a cavity.

69. Contraindications of the acrylic resin crowns are: Very small teeth. Teeth with extended carious lesions. Deep frontal occlusion. To restore the morphology of dental crown.

70. The correct answers about the dental bridge are: Is used to cover a damaged tooth. Is used to span an edentulous space. It has pontic. It is not cemented on abutments.

71. The correct answers about casting the model are: It's a clinical step. It's a technical step. Dental stones are some of the materials used to make casts. Epoxy resin is not a material used to make casts.

65.The correct answers about the tooth preparation are: Before we start the preparations, we need a written consent from the patient. The final preparations must have retentivities. The final preparations must be tronconical to cylindrical. It's a technical step.

66. Examination of the patient: It's a clinical step. It's not an important step. The patients are not asked about private information. The person conducting the assessment should be a health worker.

67. The FALSE answers about the tooth preparation are: It's a clinical step. Chamfer is not a type of finishing line of preparation. The selection of the finishing line depends on the materials used for restorations. It's a technical step.

68. The correct answer about the gypsum is: It's not important that the gypsum has abrasion resistance. All the gypsum products have the same chemical structure. It's not obtained from natural gypsum rock. It's rarely used in dental practice.

69. The FALSE answer about the teeth migrations is: Horizontal tooth migration can be by inclination (tilting) and by translation. Egression is the vertical tooth migration with the alveolar process. Extrusion is the vertical tooth migration with the alveolar process. The teeth without antagonists can provoke injuries and inflammations of the edentulous ridge.