الفهرس 
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Abstract
This study was conducted to evaluate the dental and skeletal effects of the Inman Power Component appliance in distalization of maxillary first permanent molars.
The sample was consisted of 12 female patients. However, two of them discontinued the treatment due to different causes. As a result of this, the study was performed on 10 female patients with an average age of 12 years and 2 months.
The patients were selected according to the following criteria:
- Age ranged from 11-14 years.
- Skeletal Class I.
- Space deficiency in the upper arch less than 8 mm.
- Non-extraction lower arch.
- No previous orthodontic treatment.
- Good oral hygiene.
- No oral habit.
Distalization was continued until an overcorrection Class I molar relation was achieved. For all patients, extraoral and intraoral photographs, study casts, and cephalometricradiogarphs were taken before and after distalization. Consequently, casts photocopies and cephalometric radiographs were traced and analyzed statistically. The average duration ofdistalization was 4.5 months.
Results of the study declared that the skeletal changes in the sagittal and vertical directions were insignificant.
The maxillary first molars were distalized significantly according to cephalometric measurements and dental cast measurements (5.5 ± 1.84 and 5.92 ± 3.30 mm respectively). (p<.05).
Distalization was accompanied with a in significant distal tipping about 3.45°± 7.97°and a significant increase in intermolar width by 9.34 ± 4.03 (p< .05).
However, the vertical positions of the upper first molars were insignificantly changed (p>.05), and rotations of these teeth were negligible (p>.05).
Loss of anchorage was evidenced by the significant mesialmovements of the upper first premolars according to cephalometricmeasurements and dental cast measurements4.7 ± 6.51 mm and 2.62 ± 3.85mm respectively) (p< .05). In addition, they were significantly tippedmesially (9.8°± 5.90°), rotated (3.25°± 6.01°), and extruded (2.9 ± 3.07mm) (p< .05).
On the other hand, the interpremolar (3.95±3) distance wassignificantly changed (p>.05). The maxillary incisors were significantlymoved labially (3.8 ± 7.17 mm), and proclined (4.4°± 4.85°) (p< .05).
The results declared that the upper incisors were significantly(1.3±4.21) extruded (p>.05).
The overjet was significantly increased according to cephalometricmeasurements and dental cast measurements (0.8 ± 1.31 mm and 0.9 ± 0.31mm respectively) (p< .05). Regarding the overbite, it was significantlydecreased according to cephalometric and dental cast measurements (-0.4± 0.84 mm and 0.9 ± 0.87 mm respectively) (p< .05).