Orthodontics Final Exam Quizzez 1 PDF

ORTHO FINAL EXAM QUIZZEZ 1- Separators should be placed ideally for 1 week. 19- Cement-sealant failure can be caused by moisture 2- What instrument is being used to seat this band? interference. True Band pusher 20- Thi...

ORTHO FINAL EXAM QUIZZEZ 1- Separators should be placed ideally for 1 week. 19- Cement-sealant failure can be caused by moisture 2- What instrument is being used to seat this band? interference. True Band pusher 20- This instrument is called ________ Bite stick Weingart plier Band seater Bird beak plier None of the above Howe plier 3- You should consider using the anatomical crown when Distal end cutter placing brackets. True 21- This instrument is used to cut the end of the arch the 4- Maxillary central incisors, bracket is placed at 4.5 wire. mm Distal end cutter 5- Maxillary canines, bracket is placed at 5 mm Pin and ligature cutter 6- Maxillary 1st molar, bracket is placed at 4 mm Bird beak plier 7- Mandibular lateral, bracket placed at 4 mm Howe plier 8- Mandibular 2nd premolar, bracket placed at 4.5 mm 22- Pin and ligature cutters are used to cut all ortho Brackets placement wires used throughout treatment. False Tooth Max (mm) Mand (mm) Centrals 4.5 4 Laterals 4 4 (used to cut soft wires, elastic ligatures Canines 5 5 and pins) Premolars 4.5 4.5 23- Which instrument is used to place the small elastics Molars 4 4 ties around each bracket? 9- This is an example of self-ligating bracket. False Mathieu/Hemostat plier Bird beak plier Howe plier Weingart plier 24- These are called _______________ (Self-ligating brackets have a door/latch to secure the Donuts bracket. This one is a twin bracket) Elastics 10- When etching tooth with 37% to 40% Phosphoric acid Ties solution, apply etchant full 45 sec All of the above 11- After etching, teeth should appear chalky, frosty 25- The elastic ties around brackets must be changed white. True every two weeks. False 12- Once teeth have been etched, rinsed and dried (change every 4 weeks) thoroughly, apply cement layer. False 26- Power chains are used to: (Before cement à apply a thin layer primer) Open spaces 13- What does “flash” refer to in Orthodontics? Close spaces The thin layer of sealant applied Extrude a tooth The chalky layer after etching Intrude a tooth Excess cement that oozes out, and needs to be 27- Kobayashi hooks are used to create a metal tie removed during brackets placement around a bracket in place of an elastic tie. False The process of smearing cement into the base 28- These are examples of: 14- The color indicator dot found on a new bracket Open coils must always sit toward the: Closed/holding coils distal and gingiva Closing coils distal and incisal k-hooks mesial and gingiva 29- This is an example of an open coil. It is used to open mesial and incisal spaces between teeth. True 15- Placing the backet too gingivally will cause the tooth to: Extrude Intrude Tip distally Tip mesially 30- This is an example of inter movement. False 16- Placing the backet too mesially will cause the tooth to move toward the: Distal Extrude 31- Osteoblasts- bone builders create opposition or Intrude building of bone. True Mesial 32- Tension/stretching on the PDL stimulates osteoclasts. 17- When the backet slot is not parallel with the False incisal edge, it causes tipping. True 33- Principle cell involved in control of both, the formation 18- Enamel-sealant failure can be caused by improper and resorption on bone remodeling is the osteoclasts. etching. True False 34- Teeth will move in the direction that provides the least 50- Prophy paste should be used to polish the teeth before resistance etching and cementing to ensure an adequate bond. Magnitude False Distribution 51- Obstructive sleep-apnea- 30 or more episodes of Direction breath cessation for 10 sec or more in 7 hr sleep. True Duration 52- Initial ortho wires are rectangular and are used to level 35- Head gear that is not worn 14/16 hours per day also and begin rotating the teeth. False provides poor results. This is an example of _____ (they are used to level, but they’re not Magnitude rectangular, but ROUND wires) Distribution 53- 0.019 x 1.025 stainless steel wire is considered a Direction finishing wire and used to torque the roots to their final Duration position. True 36- Single force is more effective than several different 54- This is a picture of a ______ being placed. types of forces at the same time. Ligature tie Magnitude Closing coils Distribution k-hooks Direction None of the above Duration 55- Your paedo lost their 75 early and 36 has drifted 37- _________ occurs at center of resistance forward. Which appliance is needed. Tipping Space regainer Rotation Space retainer Translation Saggital Torque Schwartz 38- Specific movement of roots only: 56- Movement that is centered around the long axis of the Tipping tooth. Rotation Rotation Translation Tipping Torque Torque 39- Extrusion is vertical movement force on the PDL. True Translation 40- The center of rotation of a tooth is approximately 1/2 57- The PDL is said to be viscoelastic which means it has the length of the root from the apex. False fluid and elastic properties. True 41- Appliances which are cemented in place with spring 58- Tension on the PDL stimulates: loaded expansion coils is an example of______ forces. Osteoblasts Continuous Osteoclasts Dissipating Cementoblasts Intermittent Fibroclasts Functional 59- FMS- used to evaluate skeletal and dental dimensions, 42- Removable appliance is an example of________ growth patterns, growth asymmetries, airways Intermittent disturbances. False 43- Hyalinization -the loss of all cells due to elimination 60- In primary occlusion, a mesial step will likely develop of blood supply in which the fibers become hyalinized. into _________ True Class I and III 44- Hyalinization- usually occurs with heavy forces and Class I and II can be quite painful. True Class I and End to End 45- Chewing gum and rinsing with hot water can relieve Class II and End to End pain for the orthodontic client. False 61- Primate spaces occur mesial to max canines and distal (chewing gum is fine, but rinse with cold water, to mand canines. True not hot) 62- This is an example of 46- The most commonly used retainer is: Class I Tooth positioner Class II Division 1 Saggital Class II Division 2 Hawley Class 1 Malocclusion Essex 63- Primary maxillary central incisors erupt: 8-12 months 47- The Essex retainer should not be recommended for 64- Primary mandibular lateral erupts: 10 to 16 months client who brux. True 65- Maxillary 2nd premolar erupts during: 10 to 12 years (Essex retainer is not for bruxism) 66- Mandibular 2nd primary molar erupts: 23-31 months 48- Sagital split osteonomy repositions maxilla. False 67- Mandibular permanent canine erupts: 9 to 10 years 49- Genioplasty surgery repositions or reshapes the: 68- Maxillary permanent 2nd molar erupts: 12 to 13 years Xygoma 69- Cephalometric radiographs allows one to assess the Premaxilla soft tissue profile of the patient. True Chin 70- Maxillary primary 2nd molar erupts: 25-33 months Nose