O

m Intraorally, the molars were half a unit Class II bilaterally. The

O lower midline was 1 mm to the right.

All permanent teeth were developing, and the two remaining upper primary second molars were about to be shed. The patient's arch form was assessed as being square. The case was treated on a non-extraction basis.

Mid-sized metal brackets (p. 28) were used in this case because of the small tooth size, and the need to assist in maintaining good oral hygiene. Commencing upper and lower archwires were .016 IIANT.

C.W. Beginning 10.3 years 7/30/96

SNA 78 ° SNB 74° ANB 4 ° A-N FH -3 mm Po-N FH -10 mm WITS 0 mm GoGnSN / 33 ° FM 24 ° MM -M 27 ° 1 to A-Po 5 mm 1 to A-Po -1 mm 1 to Max Plane 103 • to Mand Plane 89 "

C.W. Beginning 10.3 years 7/30/96

Lower second molars were banded at this stage of the treatment, to assist in overbite control.

m CO

The initial .016 HANT wires were followed by rectangular .017/.025 11 ANT wires. I lere, the case is seen after 3 months of treatment, with passive coil springs in place to hold space for the erupting upper second premolars.

After 6 months of treatment, it was possible to place upper and lower rectangular steel wires with a square arch form. Once these had been in place for 3 months, additional anterior torque was added, together with slight bite-opening curves.

The case after 8 months. The patient was asked to wear light Class II elastics (lOOgm). At this stage, it is necessary to await upper incisor torque improvement before the buccal occlusion and incisor relationship can be finally corrected.

At 18 months into treatment, upper and lower steel rectangular wires are continuing and upper incisor torque changes have taken place, allowing correction of the buccal occlusion and anterior overbite. Lower passive tiebacks and upper active tiebacks are in place.

Normal settling procedures were followed. I lere, the case is seen immediately prior to appliance removal.

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Fig. 6.89

Fig. 6.103

Fig. 6.100

The case after appliance removal. Active treatment time was 23 months.

m 73

ro H

Normal retention procedures were followed. The radiographs O indicate that there is adequate space for the developing third molars.

A pleasing improvement in facial profile was achieved in this case. The position of the incisors in the facial profile was close to ideal in terms of vertical positioning, A/P position, and torque.

Fig. 6.100

Fig. 6.103

Fig. 6.106

Some favorable growth occurred during treatment, which assisted in achieving good overbite control and reaching the treatment objectives.

Fig. 6.106

SN at S

C.W.Begin

C.W.Finai

Fig. 6.101

Fig. 6.102

Fig. 6.101

Fig. 6.102

Fig. 6.105

Fig. 6.104

Fig. 6.105

Fig. 6.104

Palatal Plane & Palate Curvature

C.W.Begin

C.W.Final

1 to A-Po 1 to Max Plane 119" to Mand Plane 91 °

FH FH WITS GoGnSN FM MM 1 to A-Po

SNA 75 SNB 74 ANB 1

mm mm mm mm mm

1 to A-Po 1 to Max Plane 119" to Mand Plane 91 °

Mand. Symphasis & Mand. Plane

C.W.Begin

C.W.Final

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