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Orthodontic Assistant Practice Exam
2023 - 2024 Version | Questions and
Answers | Latest Version!
During cementation of bands, the cement is placed ----CORRECT ANSWER--------on all surfaces within the band The attachment of anterior plastic brackets directly to teeth can be accomplished by ---- CORRECT ANSWER--------acid etch bonding Cervical anchorage (headgear) is an ----CORRECT ANSWER--------appliance that exerts distal forces on maxillary teeth After active orthodontic treatment is finished , what appliance is used to stabilize the teeth? ----CORRECT ANSWER--------A retainer When determining the length of a preformed archwire, you measure the distance from -- --CORRECT ANSWER--------first molar to first molar In the removal of an archwire ----CORRECT ANSWER--------ligature ties, then the archwire, are removed one side at a time from the buccal tube The most common type of removable retainer is a ----CORRECT ANSWER-------- Hawley retainer What is used to tie the archwire onto orthodontic brackets? ----CORRECT ANSWER----- ---Ligature wire When removing separators, care must be taken to ----CORRECT ANSWER--------avoid injuring the interdental papillae Orthodontics is the dental specialty that deals with ----CORRECT ANSWER--------the growth and development of the jaws and face
The condition in which the mandible is located ahead of the maxilla is called ---- CORRECT ANSWER--------prognathism The best way to motivate adolescents toward good oral hygiene habits is by ---- CORRECT ANSWER--------relating to social acceptance and appearance Removal of bands may be accomplished with ----CORRECT ANSWER--------anterior band slitting pliers A headgear appliance is worn ----CORRECT ANSWER--------as the orthodontist prescribes A positioner is worn ----CORRECT ANSWER--------after the removal of fixed appliances In placing TP springs, an important consideration is ----CORRECT ANSWER--------to place them from the lingual surface The instrument of choice in ligating an archwire is a ----CORRECT ANSWER-------- ligature-tying pliers Direct bracket bonding is advantage because the procedure ----CORRECT ANSWER--- -----allows the dentist less clinical chair time The attachment either welded or soldered to the bands that secure the archwire is the -- --CORRECT ANSWER--------bracket Brass separators are removed by ----CORRECT ANSWER--------cutting opposite the pigtail with ligature cutters What instrument is used to place elastic separators? ----CORRECT ANSWER-------- Elastic separating pliers The patient should be instructed to clean his or her retainer ----CORRECT ANSWER---- ----after each meal
A useful instrument for removing elastic separators is ----CORRECT ANSWER--------a sickle scaler A TP spring is a type of ----CORRECT ANSWER--------Separator An elastic separator is placed by ----CORRECT ANSWER--------stretching and pushing through the contacts When placing an archwire, one should ----CORRECT ANSWER--------insert the wire into one side of the buccal tubes, then guide it into the brackets The importance of the ligature wire is that it ----CORRECT ANSWER--------holds the archwire in place When ligating with a tie wire, the tie wire should be ----CORRECT ANSWER--------bent at a 45-degree angle Select the instrument used to check for loose bands ----CORRECT ANSWER-------- Howe pliers After cutting brass wire separators, the pigtails are cut to ----CORRECT ANSWER-------- 2 - 3 mm What instrument is used to cut ligature ties in the removal of an archwire? ---- CORRECT ANSWER--------Pin and ligature cutters When placing headgear ----CORRECT ANSWER--------insert one side of facebow first, then the other The type of appliance that has cemented bands and lingual or labial archwires is referred to as ----CORRECT ANSWER--------a fixed appliance
If an orthodontic elastic separator has been swallowed or has disappeared, the assistant should ----CORRECT ANSWER--------look for the elastic separator in the oral cavity and inform the dentist if it is not located in the oral cavity To check for loose bands ----CORRECT ANSWER--------use the Howe pliers in an occlusal and gingival direction to see if the band moves Which of the following is (are) used to determine if an alginate impression tray is the correct size for the maxillary arch? ----CORRECT ANSWER--------Tray extends to cover the maxillary tuberosity, and tray should fit well up the periphery When inspecting and evaluating an alginate impression, the assistant must check for which of the following? ----CORRECT ANSWER--------Surface detail, proper extension over retromolar area and peripheral roll, and deficiencies in the peripheral impression The brass separating wire should NOT interfere with ----CORRECT ANSWER-------- Occlusion, gingival tissue, and chewing Which of the following is (are) the correct procedure(s) for mixing zinc phosphate cement for band seating? ----CORRECT ANSWER--------Spatulate over a large area of slab and use a cool slab The information needed for the diagnosis and treatment planning of an orthodontic case includes ----CORRECT ANSWER--------complete medical history, radiographs and tracings, study models, photographs An important function of the dental assistant in an orthodontic practice is to ---- CORRECT ANSWER--------motivate and reinforce oral hygiene home care A finished Hawley retainer may have ----CORRECT ANSWER--------an acrylic palate, a labial wire, arrow clasps Before cementation ----CORRECT ANSWER--------brackets are waxed, bands are arranged in cementation order,
Which of the following are considered detergent foods? ----CORRECT ANSWER-------- Apples Using the heel or toe of the brush is helpful for cleaning which tooth surface? ---- CORRECT ANSWER--------Lingual surfaces of teeth of anterior teeth According to the manufacturer, regular preventative maintenance for the model trimmer includes all of the following EXCEPT ----CORRECT ANSWER--------replacing rag wheels Gypsum materials used for orthodontic procedures are best stored in a ----CORRECT ANSWER--------air tight dry container If a wire is used to intrude tooth #8 and the bracket is placed upside down, what effect will this cause on tooth #8? Intrude Extrude Rotate ----CORRECT ANSWER--------extrude If there is a very narrow maxilla, what kind of malocclusion will develop? ----CORRECT ANSWER--------Malocclusion II What kind of attachment is placed when sheath is added to the band? ----CORRECT ANSWER--------Lingual arch When a headgear is placed on the cervical or pull up areas what kind of malocclusion is it correcting? ----CORRECT ANSWER--------Malocclusion II What is the benefit of the etch-primer used on the enamel? ----CORRECT ANSWER----- ---Strongest bond An OA assistant is placing brackets noticed one of them slides off the position, what should they do? ----CORRECT ANSWER--------Ask the orthodontist to reposition it
What kind of wire is stiff enough to re-rotate an anterior tooth? ----CORRECT ANSWER- -------Braided What is the most common wire to control torque? ----CORRECT ANSWER-------- What is a bracket made of? ----CORRECT ANSWER--------Stainless Steel What is the prescription value and differences of the 1st and 2nd bicuspid brackets in the lower portion of the mouth? ----CORRECT ANSWER--------The buccal portion of the tooth is different What is the quality value of a braided wire, and what is the difference to a stainless steel wire? ----CORRECT ANSWER--------Stiffer What is a malocclusion II division I? ----CORRECT ANSWER--------When the anterior teeth are protruded When you place a band on a molar more mesially than distally, how will this molar rotate? ----CORRECT ANSWER--------distally Where do you place a band? ----CORRECT ANSWER--------below the height of contour When you place a bracket on a lateral anterior tooth too mesially, how will this tooth rotate? ----CORRECT ANSWER--------ligual? What kind of tie do you use for elastic when moving teeth intermaxillary? ----CORRECT ANSWER--------Kobiachi What is the movement of torque? ----CORRECT ANSWER--------Buccal-lingual If the groove of a maxillary molar is occluding with the buccal side of the mandibular molar, what kind of bite will you be correcting? - ---CORRECT ANSWER--------Crossbite
What sets the curing process in a normal environment? ----CORRECT ANSWER-------- Normal and ultraviolet light
