Case 5: class I non-extraction with mild crowding
Start records: Male age 13
. Vertical
Frankfort to
mandibular plane
Palatal to
mandibular plane
. Wits
. Steiner
Mean ± SD
25°
22° (18°- 28°)
31,5°
28° (24°- 33°)
-1 mm
-1 - +2 mm
SNA
80°
82° ± 3,5
SNB
77°
80° ± 3,5
ANB
3°
2°-4° ± 2,5
GoGnSN
35°
33° ± 2,5
7 mm
28°
10 mm
4 mm
22°
4 mm
32°
25°
68°
67°
+ 1/NA
- 1/NB
. Y-axis to SN
Start
Summary ceph measurements
- Skelettal class I average
- Upper and lower incisors are proclined and protruded
Diagnosis summary
Class I dental and skeletal with mild crowding is treated non-extraction. Mild
protrusion is managed with Labial root torque brackets on the lower incisors.
Single tooth labial root torque is applied on tooth 12 to correct the palatal root
position. Ovoid small archforms were used to maintain the original arch size and
shape.
Rotation brackets were applied to teeth 12DLa, 11D, 21D, 22M, 23D, 35D,
32MLa, 44D, 45D.
Treatment:
14 months of treatment with 14 visits.
12 month Panoramic x-ray
Final Records
. Vertical
Start
Finish
25°
25°
22° (18°- 28°)
31,5°
29,5°
28° (24°- 33°)
-1 mm
0 mm
-1 - +2 mm
SNA
80°
81°
82° ± 3,5
SNB
77°
77°
80° ± 3,5
ANB
3°
4°
2°-4° ± 2,5
GoGnSN
35°
35°
33° ± 2,5
7 mm
6 mm
4 mm
28°
22°
22°
10 mm
10 mm
4 mm
32°
28°
25°
68°
69°
67°
Frankfort to
mandibular plane
Palatal to
mandibular plane
. Wits
. Steiner
+ 1/NA
- 1/NB
. Y-axis to
SN
Summary ceph measurements
- Upper and lower incisors retroclined
- Protrusion was not changed
Mean ± SD
Final Remarks:
The incisors retracted only slightly. Some archwire expansion may have resulted
in more incisor retraction, as archwires to maintain the original size and shape were
used.
Additional comments not a part of the examination
Doctor time: No assistants are employed in this practice
 consultations (2), taking records, processing records, diagnosis = 3 hour.
The time is listed the same as with straight wire, even though there is
more time in the diagnosis of the appliance.
 Initial band and bond (direct) = 1.5 hour
 3 visits @ 15 min = 45 min
 8 visits of 20 minutes = 2.7 hours
 2 visits @ 30 minutes (finishing) = 1 hour
 Deband, final records, retainers = 1.5 hour
Total doctor time = 11 hours
Estimated with assistant: doctor 7.5 hours/ assistant 3.5 hours
Rotation correction: rotation brackets were applied to teeth 12DLa, 11D, 21D, 22M,
23D, 35D, 32MLa, 44D, 45D. Several teeth are over-corrected (44, 45, 11, 21, 22, 23)
with the others fully corrected (35, 32, 12).