10
0
20
30
40
50
60
70
80
90
100
Mandibular Arch
Maxillary Arch
0.016
SC
110
120 130 140 150
0.016
SC
0.014
NiTi
0.014
NiTi
0.016
NiTi
0.016
NiTi
0.017 x 0.022
SPEED NiTi
0.017 x 0.022
SPEED NiTi
0.018 x 0.018
NiTi SPEED D Wire
0.018 x 0.018
NiTi SPEED D Wire
Weeks
0.018 x 0.018 x 0.018
Hills Dual
Geometry Wire
0.018 x 0.018
Stainless Steel
SPEED D Wire
with RCOS
0.017 x 0.022
Stainless Steel
SPEED Wire
0.017
x
0.022
SPEED SS
7W 7W
20W
19W
16W
22W
16W
7W 7W
20W
19W
27W
11W
16W
W = Weeks (e.g. 29 W = 29 Weeks)
Archwire Progression:
Treatment Record:
Initial Bonding
Tooth numbers 14, 24, 35, 45 were extracted. Three weeks later SPEED Brackets were direct bonded upper 5-5 and lower 4-4.
Bands were placed on upper and lower first molars in the event Forsus Springs™ were required later in treatment.
Aligning
Segmental 0.016 Supercable archwires were placed 3-3 in the upper, and 4-4 in the lower. Supercable was selected due to
its extreme flexibility and low force/deflection characteristics. The objective was to align the anterior teeth without taxing
anchorage. Due to the low friction environment created through the combination of the .018 slot and an undersized 0.016
Supercable, no retraction force was necessary, thus preserving anchorage. The crowded incisors are able to align because
the teeth adjacent to the extraction sites are free to follow the path of least resistance permitting distal movement into the
extraction site.
Approximately 7 weeks into treatment, the archwires were changed to 0.014 Heat Activated Nickel Titanium wire, placed
molar to molar in both arches. At the time this wire was placed, significant alignment was already evident in both arches,
with approximately 1/3 of the extraction space already closed. No loss of anchorage and little/no proclining of the
incisors occurred as the teeth aligned. Because no retraction forces were used, little tipping of the upper canines and lower
premolars occurred. Initial alignment continued with the placement of 0.016 Nickel Titanium archwires in both arches
approximately 7 weeks later.
It should be noted that one of the significant advantages of the SPEED Appliance over any passive self-ligating appliance
is that rotation control can be completed in very light wires (0.016 Nickel Titanium in .018 slot brackets, and 0.018 Nickel
Treatment of: Class II Div. I -
Extraction of Upper 1st and Lower 2nd Premolars
