Rate of Canine Retraction
Conditions
Keywords
canine retraction, double slot brackets, Orthodontic tooth movement
Brief summary
The aim of this Randomized clinical trial is to compare the efficacy of the double slot brackets compared to single slot-brackets in producing a controlled rate of upper canine retraction into premolar extraction space. patients will be randomly divided into one of the two groups, CBCT (cone beam computed tomography) and dental models will be taken for each patient Pre-retraction and following the study completion. The rate of retraction will be evaluated for both groups as well as Amount of canine root movement and molar anchorage loss will be also assessed.
Detailed description
Eligible patients will be examined for fulfilling the inclusion criteria. All the recruited patients need extraction of upper first premolars followed by canine retraction with maximum anchorage. The patients will be randomly allocated to one of the two groups; either Double slot brackets or single slot-brackets group. In Double slot bracket group, Canine retraction will be made on two 0.016'' StSt (stainless steel) round wires, each in one of the slots of the double slot brackets. while in single slot-bracket group, Retraction will be made on one 0.017''×0.025'' rectangular StSt arch wire . The patients will be seen on a monthly basis for follow up visit for reactivation of retraction to maintain constant force during the study. An impression will be taken for the patients every visit, fabricated dental models will be digitally scanned. The scanned models will be used to monitor the rate of canine retraction. Every patient will be asked to take a CBCT image of the upper arch pre Retraction and after the completion of study duration (3 months). After data collection, assessors will carry on the measurements blindly. Statistical analysis of the data will be done and the results will be compared to evaluate the effectiveness of both techniques for canine retraction.
Interventions
DEVICEDouble-slot brackets
Miniscrews will be inserted in the buccal alveolar bone between first and second molars bilaterally and ligated to second premolar. Canine Retraction using Nickel titanium closed-coil springs delivering a force of 150 gram, extending the spring between the canine and first molar hooks. retraction on double 0.016'' Stainless steel round wires in both slots of the double slot brackets. Re-activation of the coil spring will be done in the follow up visits to maintain a constant force through the study.
DEVICESingle-slot brackets
Miniscrews will be inserted in the buccal alveolar bone between first and second molars bilaterally and ligated to second premolar. Canine Retraction using Nickel titanium closed-coil springs delivering a force of 150 gram, extending the spring between the canine and first molar hooks. retraction on single 0.017x0.022'' Stainless steel wire. Re-activation of the coil spring will be done in the follow up visits to maintain a constant force through the study.
Sponsors
Cairo University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)
Masking description
Due to the nature of the intervention, neither participants nor investigators can be blinded.
Intervention model description
study is a randomized clinical trial, single-center, parallel group, two-arms with 1:1 allocation ratio
Eligibility
Sex/Gender
ALL
Age
16 Years to 26 Years
Healthy volunteers
Yes
Inclusion criteria
* Good oral hygiene. * Adult Male or Female patients with an age range of 16-26 years old. * Full set of permanent dentition(excluding third molar). * Any kind of malocclusion requiring first premolar extraction and canine retraction. * Patients with type/pattern of crowding that allows leveling and alignment before premolar extraction
Exclusion criteria
* History of previous orthodontic treatment. * Craniofacial deformity. * Systematic disease or administrating drugs affecting tooth movement. * Poor oral health.
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| rate of canine retraction | 3 months | millimeters through superimposed digital models taken for each patient monthly at the follow up visits. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| Total distance moved by the maxillary canine tip | 3 months | movement in millimeters through superimposed pre- and post-retraction digital models. |
| Amount of canine root movement | 3 months | millimeters through pre and post retraction CBCT (cone beam computed tomography) images of the upper arch |
| the change in Maxillary canine Torque | 3 months | angular change through comparing pre- and post-retraction CBCT |
| change in maxillary canine tipping | 3 months | angular change through comparing pre- and post-retraction CBCT |
| The changes in maxillary canine rotation | 3 months | angular change through superimposed pre- and post-retraction digital models. |
| Amount of maxillary canine root resorption | 3 months | millimeters through pre and post retraction CBCT (cone beam computed tomography) images of the upper arch |
| Molar cusp anchorage loss | 3 months | millimeters through superimposed digital models taken for each patient monthly at the follow up visits. and pre and post retraction CBCT images |
Countries
Egypt
Contacts
STUDY_CHAIRAmr R El Beialy, Assoc.Prof
Orthodontic department, Faculty of Dentistry, Cairo University
STUDY_DIRECTORNada O El Zawahry, lecturer
Orthodontic department, Faculty of Dentistry, Cairo University
STUDY_DIRECTORNoha A El Ashmawi, lecturer
Orthodontic department, Faculty of Dentistry, Cairo University
Outcome results
None listed