Orthodontic Space Closure Clinical Trial
Official title:
Miniscrews as Anchorage Device for Orthodontic Treatment - Randomized Controlled Trials on Anchorage Capacity, Cost Efficiency and Patient Acceptance
The purpose of this trial is to study and compare two different anchorage techniques.
Adolescent patients in need for orthodontic treatment are randomized into Group A and B. Both
groups are treated with extractions of the maxillary first premolars and fixed appliance.
Anchorage is reinforced by miniscrews in Group A and by molarblock in Group B.
The hypotheses are:
- that placement of miniscrews does not cause more pain or discomfort than premolar
extractions
- that molarblock provides increase of anchorage
- that miniscrews have a better anchorage capacity than molarblock
- that miniscrews are more cost-efficient than conventional anchorage techniques
Participants are recruited from the orthodontic specialist clinic in Gävle, Sweden. After
informed consent participants are randomized into Group A and B. The treatment starts with
extractions of the maxillary first premolars. Extractions are performed by the participants´
general practitioner. Orthodontic treatment starts after the tooth extractions.
All participants get treatment with fixed appliance according to the straight wire concept
(3M Victory brackets, .022 slot size, McLaughlin-Bennet-Trevesi prescription). The
recommended wire sequence is: .016 Heat Activated Nickel Titanium, .019x.025 Heat Activated
Nickel Titanium, .019x.025 Stainless Steel. Treatment time is about two years.
The following measurements are taken at:
T0 (Before treatment start): Study models, baseline questionnaire,
T1 (after tooth extractions, before the orthodontic treatment): Study models, cephalographic
x-ray, questionnaire at the evening after tooth extractions, questionnaire one week after
tooth extractions.
T2 (After miniscrew placement (Group A), Before space closure): Study models, cephalographic
x-ray, questionnaire at the evening after miniscrew placement, questionnaire one week after
miniscrew placement.
T3 (After space closure and miniscrew removal): Study models, cephalographic x-ray,
questionnaire after screw removal
;
| Status | Clinical Trial | Phase | |
|---|---|---|---|
| Active, not recruiting |
NCT02887547 -
Biological Markers Evaluation of Accelerated Tooth Movement
|
N/A | |
| Recruiting |
NCT03903575 -
3D Comparison of Anterior Teeth Retraction and Anchorage Control Between En-masse and Two-step Mechanics
|
N/A |