MDS PREP

Which of the following forces best accomplish orthodontic tooth movement?

1) Heavy and continuous

2) Heavy and intermittent

3) Light and continuous

4) Light and intermittent

Orthodontics Answer: 3

SOLUTION

Light and continuous
Use of continuous light force is recommended to be applied for adult group of patient rather than intermittent force as applied by removable appliance. This is because continuous forces are expected to bring about direct resorption of the root socket. They should hence not occlude more than a small percentage of blood vessels with in the periodontal ligament, not substantially interfere with their nutritional supply and little interference
with normal biologic functioning. In adult due to heavy force teeth may devitalize because the opening into the tooth (apical foramen) is smaller and blood vessels can be easily disrupted.

Baker anchorage utilizes

1) Intermaxillary anchorage with screws

2) Intramaxillary anchorage with screws

3) Intermaxillary anchorage with elastics

4) Intramaxillary anchorage with elastics

Orthodontics Answer: 3

SOLUTION

Intermaxillary anchorage or Baker's Anchorage. This type of anchorage involves using elastics from one jaw to the other, in the form of either Class 2 elastics (moving upper teeth back) where lower molar teeth serve as anchors, or Class 3 elastics (moving lower teeth back) where upper molars serve as anchors.

Intramaxillary anchorage is also used in the form of E-chain, when elastics are used from the back molar teeth to the front teeth in the same jaw to move teeth back of the mouth.

If maxillary canines are placed forward to orbital plane, they are said to be in
1) Protraction
2) Retraction
3) Abstraction
4) Contraction

Orthodontics Answer: 1

Primary central incisor develops from
1) One lobe
2) Two lobes
3) Three lobes
4) Four lobes

Orthodontics Answer: 1

All of the following increase anchorage resulting in tooth movement except
1) Attaching more number of tooth units
2) Use of extraoral forces
3) Use of rectangular slots in fixed appliances
4) Reciprocating maxilla against mandible

Orthodontics Answer: 3

Child has a flush terminal plane early in mixed dentition. Movement of the lower molar forward relative to the upper molar by
1) 1 mm
2) 1.5 mm
3) 2 mm
4) 3.5 mm

Orthodontics Answer: 4

Best time to correct anterio-posterior discrepancies of skeletal bases
1) Primary dentition period
2) Mixed dentition period
3) Permanent dentition period
4) Post permanent dentition period

Orthodontics Answer: 2

Carpal radiograph is used for assessment of
1) Bone condition
2) Chronological age
3) Treatment plan
4) Skeletal maturation

Orthodontics Answer: 4

MDS PREP

Which of the following forces best accomplish orthodontic tooth movement?

1) Heavy and continuous

2) Heavy and intermittent

3) Light and continuous

4) Light and intermittent

Baker anchorage utilizes

1) Intermaxillary anchorage with screws

2) Intramaxillary anchorage with screws

3) Intermaxillary anchorage with elastics

4) Intramaxillary anchorage with elastics

If maxillary canines are placed forward to orbital plane, they are said to be in
1) Protraction
2) Retraction
3) Abstraction
4) Contraction

Primary central incisor develops from
1) One lobe
2) Two lobes
3) Three lobes
4) Four lobes

All of the following increase anchorage resulting in tooth movement except
1) Attaching more number of tooth units
2) Use of extraoral forces
3) Use of rectangular slots in fixed appliances
4) Reciprocating maxilla against mandible

Child has a flush terminal plane early in mixed dentition. Movement of the lower molar forward relative to the upper molar by
1) 1 mm
2) 1.5 mm
3) 2 mm
4) 3.5 mm

Best time to correct anterio-posterior discrepancies of skeletal bases
1) Primary dentition period
2) Mixed dentition period
3) Permanent dentition period
4) Post permanent dentition period

Carpal radiograph is used for assessment of
1) Bone condition
2) Chronological age
3) Treatment plan
4) Skeletal maturation

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MDS PREP

Which of the following forces best accomplish orthodontic tooth movement? 1) Heavy and continuous 2) Heavy and intermittent 3) Light and continuous 4) Light and intermittent

Baker anchorage utilizes 1) Intermaxillary anchorage with screws 2) Intramaxillary anchorage with screws 3) Intermaxillary anchorage with elastics 4) Intramaxillary anchorage with elastics

If maxillary canines are placed forward to orbital plane, they are said to be in1) Protraction2) Retraction3) Abstraction4) Contraction

Primary central incisor develops from1) One lobe2) Two lobes3) Three lobes4) Four lobes

All of the following increase anchorage resulting in tooth movement except1) Attaching more number of tooth units2) Use of extraoral forces3) Use of rectangular slots in fixed appliances4) Reciprocating maxilla against mandible

Child has a flush terminal plane early in mixed dentition. Movement of the lower molar forward relative to the upper molar by1) 1 mm2) 1.5 mm3) 2 mm4) 3.5 mm

Best time to correct anterio-posterior discrepancies of skeletal bases1) Primary dentition period2) Mixed dentition period3) Permanent dentition period4) Post permanent dentition period

Carpal radiograph is used for assessment of 1) Bone condition2) Chronological age3) Treatment plan4) Skeletal maturation

Explore by subjects

Which of the following forces best accomplish orthodontic tooth movement?

1) Heavy and continuous

2) Heavy and intermittent

3) Light and continuous

4) Light and intermittent

Baker anchorage utilizes

1) Intermaxillary anchorage with screws

2) Intramaxillary anchorage with screws

3) Intermaxillary anchorage with elastics

4) Intramaxillary anchorage with elastics

If maxillary canines are placed forward to orbital plane, they are said to be in
1) Protraction
2) Retraction
3) Abstraction
4) Contraction

Primary central incisor develops from
1) One lobe
2) Two lobes
3) Three lobes
4) Four lobes

All of the following increase anchorage resulting in tooth movement except
1) Attaching more number of tooth units
2) Use of extraoral forces
3) Use of rectangular slots in fixed appliances
4) Reciprocating maxilla against mandible

Child has a flush terminal plane early in mixed dentition. Movement of the lower molar forward relative to the upper molar by
1) 1 mm
2) 1.5 mm
3) 2 mm
4) 3.5 mm

Best time to correct anterio-posterior discrepancies of skeletal bases
1) Primary dentition period
2) Mixed dentition period
3) Permanent dentition period
4) Post permanent dentition period

Carpal radiograph is used for assessment of
1) Bone condition
2) Chronological age
3) Treatment plan
4) Skeletal maturation