ANCHORAGE IN ORTHODONTICS Flashcards
Resistance to unwanted movement
ANCHORAGE IN ORTHODONTICS
“the resistance to unwanted tooth movement”. (Profitt)
ANCHORAGE
ACCORDING TO SITE:
Intra-oral sources
Extra-oral sources
Teeth
A. Intra-oral sources
B. Extra-oral sources
A
Alveolar bone
A. Intra-oral sources
B. Extra-oral sources
A
Cortical bone
A. Intra-oral sources
B. Extra-oral sources
A
Basal jaw bone
A. Intra-oral sources
B. Extra-oral sources
A
Musculature
A. Intra-oral sources
B. Extra-oral sources
A
Cervical
A. Intra-oral sources
B. Extra-oral sources
B
Occipital
A. Intra-oral sources
B. Extra-oral sources
B
Cranial
A. Intra-oral sources
B. Extra-oral sources
B
Facial
A. Intra-oral sources
B. Extra-oral sources
B
Frontal bone, Mandibular symphysis
A. Intra-oral sources
B. Extra-oral sources
B
Back of the neck (cervical bone)
A. Intra-oral sources
B. Extra-oral sources
B
Anchor teeth are moved to _____ at old EXO sites
cortical bone
T/f
Cortical
tooth movement is fast as roots encounter cortical bone along resorbed alveolar ridge
F
(tooth movement is SLOWED as roots encounter cortical bone along resorbed alveolar ridge)
MANNER OF APPLICATION OF FORCE
- SIMPLE
- STATIONARY
- RECIPROCAL
Greater number of teeth to move a single tooth
A. SIMPLE
B. STATIONARY
C. RECIPROCAL
A
active movement of one tooth versus several anchor teeth.
A. SIMPLE
B. STATIONARY
C. RECIPROCAL
A
Application of force displaced the anchor units in the same plane of space from which the force is applied
•putting bodily
A. SIMPLE
B. STATIONARY
C. RECIPROCAL
B
•Two teeth or resistance
units of equal size
•moved against each
other
A. SIMPLE
B. STATIONARY
C. RECIPROCAL
C
move the same amount toward or away from each other
A. SIMPLE
B. STATIONARY
C. RECIPROCAL
C
ACCORDING TO THE JAWS INVOLVED
- INTERMAXILLARY
- INTRAMAXILLARY
anchorage units in one jaw provide the force to move teeth in the same jaw
A. INTERMAXILLARY ANCHORAGE
B. INTRAMAXILLARY ANCHORAGE
B
Teeth being moved in one arch are resisted by teeth in the same arch
A. INTERMAXILLARY ANCHORAGE
B. INTRAMAXILLARY ANCHORAGE
B
anchorage units in one jaw provide the force to move teeth in the other jaw
A. INTERMAXILLARY ANCHORAGE
B. INTRAMAXILLARY ANCHORAGE
A
Teeth being moved in one arch are resisted by teeth in the opposite arch
A. INTERMAXILLARY ANCHORAGE
B. INTRAMAXILLARY ANCHORAGE
A
ACCORDING TO NUMBER OF ANCHORAGE UNITS
1.SINGLE OR PRIMARY 2.COMPOUND
3.MULTIPLE OR REINFORCED
Single tooth with greater alveolar support is used to move a tooth with a lesser alveolar support
A. SINGLE OR PRIMARY
B. COMPOUND
C. Reinforced
D. A and b
D
Adding or using more than 1 type of resistance units
A. SINGLE OR PRIMARY
B. COMPOUND
C. Reinforced
D. A and b
C
additional teeth to the unit to distribute the force over a larger root surface area in the anchorage unit
A. SINGLE OR PRIMARY
B. COMPOUND
C. Reinforced
D. A and b
C
HEADGEAR APPLIANCE
1. •Classification
2. •Function
Classification: fixed-removable active (functional) treatment appliance
Function:
-for skeletal class II due to maxillary excess
increased SNA)
-anchorage
-anterior deep/open bite
