Post Test Flashcards
A headgear appliance is used for:
A. Anchorage
B. Traction
C. Both anchorage and traction
D. Neither anchorage or traction
C. Both anchorage and traction
Which appliance is probably the most widely used today by orthodontists?
A. The begg appliance
B. The edgewise appliance
C. The universal appliance
D. None of the above
B. The edgewise appliance
An active finger spring of a removable appliance usually touches the tooth with a point contact. What is the most likely type of tooth movement produced in this situation?
A. Tipping
B. Extrusion
C. Intrusion
D. Translation
A. Tipping
Prior to direct bonding, _______ is used as an etching agent. Prior to placing bands, _______ is used as an etching agent.
A. Nothing; 35-50% unbuffered phosphoric acid
B. 35-50% unbuffered phosphoric acid; nothing
C. Nothing; 10-15% unbuffered phosphoric acid
D. 10-15% unbuffered phosphoric acid; nothing
B. 35-50% unbuffered phosphoric acid; nothing
Orthodontic forces can be treated mathematically as vectors.
Forces produce either translation (bodily movement), rotation, or a combination of translation and rotation, depending upon the relationship of the line of action of the force to the center of resistance of the tooth.
A. Both statements are true
B. Both statements are false
C. The first statement is true, the second is false
D. The first statement is false, the second is true
A. Both statements are true
Which of the following may cause extrusion of the maxillary first molars which can cause an open bite?
A. Straight-pull headgear
B. Reverse-pull headgear
C. Cervical-pull headgear
D. High-pull headgear
C. Cervical-pull headgear
Statement A: Maxillary expansion is often done to correct crossbites.
Statements B: Tongue thrusting often causes crossbite.
A. Both statements are true
B. Both statements are false
C. The first statement is true, the statement is false
D. The first statement is false, the second is true
C. The first statement is true, the statement is false
Tongue thrusting often causes crossbite❌
Tongue thrusting often causes OPENBITE
A “Poor man’s Cephalometric Analysis” is performed via a:
A. Dental cast analysis
B. Facial profile analysis
C. Photographic analysis
D. Full face analysis
B. Facial profile analysis
In predicting the time of the pubertal growth spurt, while treating jaw relationships in a growing child, the orthodontist can get the most valuable information from:
A. Wrist-hand radiograph
B. Height-weight tables
C. Presence of secondary sex characteristics
D. Stage of dental development
A. Wrist-hand radiograph
During a serial extraction case, which teeth are NOT typically removed?
A. Primary canines
B. Primary first molars
C. Permanent first premolars
D. Primary second molars
D. Primary second molars
At age 9, young Jimmy needs his tooth #30 extracted due to caries. What is the proper space maintenance treatment?
A. Distal shoe on “T”
B. Band and loop on “T”
C. Removable partial denture
D. No space maintenance is needed
D. No space maintenance is needed
A post-orthodontic circumferential supracrestal fibrotomy is performed to sever collagen fibers, thus reducing the tendency of a rotated tooth to relapse.
A. Both statements are true
B. Both statements are false
C. The first statement is true, the second is false
D. The first statement is false, the second is true
A. Both statements are true
Bone deposition in the _________ of the maxillary arch region is responsible for the lengthening
A. Palate
B. Tuberosity
C. Incisor
D. Zygomatic
B. Tuberosity
NOTES:
LENGTHENING= anteroposterior
WIDENING= lateral
The length of the mandibular arch is longer than the maxillary arch.
The difference is only about 2 mm.
A. Both statements are true
B. Both statements are false
C. The first statement is true, the second is false
D. The first statement is false, the second is true
D. The first statement is false, the second is true
The length of the mandibular arch is longer than the maxillary arch. ❌
The length of the MAXILLARY arch is longer than the MANDIBULAR arch.
The most commonly impacted tooth is the mandibular canine.
The longer a tooth has been impacted, the more likely it is to be ankylosed.
A. Both statements are true
B. Both statements are false
C. The first statement is true, the second is false
D. The first statement is false, the second is true
D. The first statement is false, the second is true
The most commonly impacted tooth is the mandibular canine.❌
The most commonly impacted tooth is the MAXILLARY canine.
The time required to upright a molar can vary from:
A. 2-3 weeks
B. 1-2 months
C. 2-6 months
D. 6-12 months
E. 2-3 years
D. 6-12 months
The time required to stabilize the molar can vary from:
A. 2-3 weeks
B. 1-2 months
C. 2-6 months
D. 6-12 months
E. 2-3 years
C. 2-6 months
All of the following are signs of incipient malocclusion, except?
A. Lack of spacing in primary dentition
B. Crowding of permanent incisors in mixed dentition
C. Premature loss of mandibular primary canines
D. Larger than normal primary teeth
D. Larger than normal primary teeth❌
A patient presents to your office claiming that they have “Long Face Syndrome” based on what he learned on webdds.com. The man has obvious mouth breathing as noted by your morning patient who sat next to the man in the waiting room. What malocclusion are you immediately thinking that he has?
A. Dental open bite
B. Skeletal open bite
C. Dental cross bite
D. Skeletal cross bite
B. Skeletal open bite
Which of the following is the least common?
A. Class I malocclusion
B. Class II malocclusion
C. Class III malocclusion
D. Normal occlusion
C. Class III malocclusion
NOTES:
Class I malocclusion > Class I NO> Class II malocclusion> Class III malocclusion
Primary molar relationships are known as:
A. Class relationships
B. Step relationships
C. Primitive relationships
D. Occlusion relationships
B. Step relationships
A periapical radiograph of primary tooth M shows tooth #22 overlapping half of the root. The patient is not in the chair, so you cannot palpate to determine on which side tooth #22 is erupting. What would you presume?
A. Tooth #22 is erupting distally
B. Tooth #22 is erupting mesially
C. Tooth #22 is erupting lingually
D. Tooth #22 is erupting facially
D. Tooth #22 is erupting facially
Which of the following teeth are required for a dentist to perform a Moyers’ mixed dentition analysis?
A. Mandibular first molars
B. Maxillary first molars
C. Mandibular incisors
D. Maxillary incisors
C. Mandibular incisors
An 18-year-old patient presents back to you complaining of crowding of his lower anterior incisors. You explain that this is because of:
A. Late mandibular growth
B. Pressure from third molars
C. Maxillary tooth-size excess
D. Trauma
E. An oral habit he must have
A. Late mandibular growth