Orthodontic Appliance Complication
Conditions
Brief summary
Indirect anchorage (In-A) has been broadly used for anchorage reinforcement during anterior segment retraction. The study compared between the efficacy of rigid vs non-rigid connections of In-A i during upper canine retraction in dentoalveolar protrusion cases
Detailed description
Fifteen female patients with dentoalveolar protrusion were included in this study. A miniscrew was inserted following levelling and alignment between the upper first molar and second premolar of both sides. Randomization was applied before first premolar extraction where one side of the arch received a rigid indirect anchorage connection (Group I) of 0.019 x 0.025-inch stainless steel (St.St) archwire from the miniscrew to the auxiliary tube of the upper first molar band, and the other side received a non-rigid indirect anchorage connection (Group II) of 0.014-inch St.St ligature ligating the upper second premolar to the miniscrew. Canine retraction was performed on 0.017 x 0.025-inch St.St archwire applying 1.5 N retraction force. The duration of the study was 7 months. Data was collected from digitized models where anchorage loss of the upper first molar relative to the frontal plane and the vertical position of the upper second premolar were measured
Interventions
PROCEDUREnon rigid indirect anchorage connection
a nonrigid connection is placed between the miniscrews and the second premolar to prevent mesial tooth movement.
PROCEDURErigid indirect anchorage connection
a rigid connection is placed between the miniscrews and the first molar to prevent mesial tooth movement.
Sponsors
Cairo University
Study design
Allocation
RANDOMIZED
Intervention model
PARALLEL
Primary purpose
TREATMENT
Masking
SINGLE (Outcomes Assessor)
Intervention model description
split mouth randomized clinical trial
Eligibility
Sex/Gender
FEMALE
Age
13 Years to 23 Years
Healthy volunteers
Yes
Inclusion criteria
Adult females Bimaxillary protrusion requiring first premolars extractions Full permanent dentition Good oral hygiene
Exclusion criteria
History of previous orthodontic treatment Abnormalities in teeth size and/or shape Vertical, transverse, or anteroposterior skeletal discrepancies Anti-inflammatory medication
Design outcomes
Primary
| Measure | Time frame | Description |
|---|---|---|
| anchorage loss | 4 month | amount of anchorage loss of the upper first molar during canine retraction using digital model in mm. |
Secondary
| Measure | Time frame | Description |
|---|---|---|
| vertical position of the upper second premolar | 4 month | The secondary outcome was to assess the change in the vertical position of the upper second premolar following canine retraction using indirect anchorage using digital models in mm. |
Countries
Egypt
Outcome results
None listed