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document
Multitomographic evaluation of the dental effects of two different rapid palatal expansion appliances . Rapid palatal expansion ( RPE ) is widely used in the treatment of transverse maxillary deficiencies . Generally , there are two types of RPE appliances : banded and bonded expanders . The purpose of this prospective study was to compare the dental effects of banded and bonded appliances . The study consisted of 23 patients ( 13 females and 10 males ) with a bilateral maxillary deficiency . Twelve patients ( seven females and five males ) with a mean age of 14.8 +/- 0.3 years were treated with banded RPE and 11 patients ( six females and five males ) with a mean age of 15.1 +/- 0.7 years with bonded RPE . Multitomographic radiographs were taken before ( T0 ) and at the end ( T1 ) of expansion while the patients were wearing an acrylic mandibular appliance in which ball bearings and bars were embedded . Statistical analyses of the measurements at T0 and T1 were undertaken with a paired t-test , and the difference between the groups assesed with a Student 's t-test . In both groups , the angle between the radiographic image of the bar and the axial inclination of the upper first premolar and molar teeth was ( 5.34 and 2.73 degrees for the right premolars , 5.17 and 2.28 degrees for the left premolars , 11.83 and 3.73 degrees for the right molars , and 9.75 and 5.64 degrees for the left molars in the banded and bonded groups , respectively . The distance from the vestibular cortical plate to the palatal root of these teeth ( 1.17 and 1.23 mm for the right premolars , 2.46 and 1.09 mm for the left premolars , 2.75 and 0.64 mm for the right molars , 2.23 and 0.96 mm for the left molars in the banded and bonded groups , respectively ) increased ( both P < 0.01 ) . These increases indicated buccal tipping of the teeth . Comparison of the two groups showed that tipping of the first molar and premolar teeth in the banded group was significantly more than in the bonded group ( P < 0.01 and P < 0.001 , respectively ) .
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Intervention_Physical
rapid palatal expansion appliances
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Intervention_Physical
Rapid palatal expansion ( RPE )
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Intervention_Physical
RPE appliances : banded and bonded expanders
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Intervention_Physical
banded and bonded appliances
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Intervention_Physical
banded RPE
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Intervention_Physical
bonded RPE
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Outcome_Pain
dental effects
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Outcome_Physical
dental effects
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Outcome_Mental
angle between the radiographic image of the bar and the axial inclination of the upper first premolar and molar teeth
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Outcome_Physical
distance from the vestibular cortical plate to the palatal root of these teeth
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Outcome_Pain
buccal tipping
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Outcome_Other
tipping of the first molar and premolar teeth
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Participant_Condition
transverse maxillary deficiencies .
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Participant_Sample-size
23 patients
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Participant_Sample-size
13
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Participant_Sex
females
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Participant_Sample-size
10
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Participant_Sex
males
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Participant_Sample-size
Twelve patients
32140
Participant_Sample-size
seven
32141
Participant_Sex
females
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Participant_Sample-size
five
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Participant_Sex
males
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Participant_Age
mean age of 14.8 +/- 0.3 years
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Participant_Sample-size
11 patients
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Participant_Sample-size
six
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Participant_Sex
females
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Participant_Sample-size
five
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Participant_Sex
males
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Participant_Age
mean age of 15.1 +/- 0.7 years