Principles of pre adjusted edgewise appliances

PRINCIPLES OF
PRE ADJUSTED EDGEWISE
APPLIANCES
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Growth
Habits
CON
GENI
TAL
C
O
M
P
I
L
A
N
C
E
PSHYCOLOGY

• Diagnosis
• Treatment objectives
• Treatment planning:
• 1.space management
• 2.intra arch alignment and levelling
• (vertical correction)
• 3.extraction space closure
• 4.finishing and detailing the case

1. tipping
2. bodily movement
3. intrusion
Treatment objective 4.extrusion
5.rotation
By moving the teeth 6.torquing
7.uprighting

7 types of tooth several fixed appliance
movement techniques
(variations in biomechanics)

• Fixed appliances that utilizes:
a. stationary anchorage principle
b. reinforced anchorage principle
c. combination of the both anchorage
principles

Pre adjusted edgewise is an
advancement of angles edgewise
system

Evolution of PEA
ANGLE(1927)
HOLDAWAY(1952)
JARABAK(1957)

Andrews six keys of normal occlusion

CONSISTANT BRACKET POSITIONING AREA

Mid transverse plane
of slot, stem & the
crown must be in the
same plane.
In the diagram the
mid transverse plane
is represented in
dotted line
Feature
1:

Feature
2 :

Feature
3 :

Feature
4 :Mid sagittal plane of slot, stem & crown must be
the same

Feature
5 :-

Feature
6 :

Feature
7 :-The vertical components of the bracket should be
parallel to one another

Feature
8 :
Within an arch, all slot points must have
the same distance between them & the
crown's embrasure line

1.8 , 2.25, 1.4, 1.5, 1.5, 1, 1
2.3, 2.3, 1.6, 1.15, 1.15, 1,1

TIP TRQ TIP TRQ TIP TRQ R’TION
5 +7 5 +7/2/12
9 +3 9 +3/-2/8
11 -7 11 -7 14/15 -7 4/6
2 -7 2 -7 5 -7 4
2 -7 2 -7 0/-1/-2 -7 2/4/6
5 -9 5/0 -9 3/2/1 -13/-14/-15 12/14/16
5 -9 5/0 -9 3/2/1 -13/-14/-15 12/14/16www.indiandentalacademy.com

Bracket selection
1. slot sizes issues
2. Bracket prescriptions issues
3. Bracket positioning issues

SLOT SIZE ISSUSE

INTRA ARCH ALIGNMENT
1. VARIOUS WIRES
2. MECHANISM OF ARCH ALIGNMENT

VARIOUS WIRES

MECHANISM OF ARCH
ALIGNMENT
• 1. Space utilization
• 2. Reciprocal anchorage

Bite opening issue

EXTRACTION SPACE
CLOSURE

THANK YOU

Principles of pre adjusted edgewise appliances

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