Clinical Trial Details
— Status: Completed
Administrative data
| NCT number |
NCT04184427 |
| Other study ID # |
TArif |
| Secondary ID |
|
| Status |
Completed |
| Phase |
N/A
|
| First received |
|
| Last updated |
|
| Start date |
June 25, 2019 |
| Est. completion date |
March 1, 2021 |
Study information
| Verified date |
October 2022 |
| Source |
Dow University of Health Sciences |
| Contact |
n/a |
| Is FDA regulated |
No |
| Health authority |
|
| Study type |
Interventional
|
Clinical Trial Summary
The controlled three dimensional movement of anterior dentition during orthodontic treatment
is a desire of every orthodontist. Maxillary en masse retraction with mini implants has been
reported to provide absolute anchorage thus utilizing the complete extraction spaces thereby
enhancing patient's esthetics. Power arm or anterior retraction hook permits the application
of force close to a desired direction thereby warranting better anterior dentition control.
Various heights of power arms and proposed centre of resistance for six maxillary anterior
teeth have been estimated through finite element model and also from a very limited number of
clinical studies. For a set of teeth, the determination of centre of resistance is complex in
actual clinical scenario and response of force applied from certain level for better anterior
dentition control requires sufficient clinical evidence suggestive of further clinical
studies to endow orthodontists to hasten treatment due to less time consumption during
finishing stage of orthodontic treatment.
Description:
This Randomized Control Trial will be conducted to compare the effects of various heights of
anterior power arm on maxillary anterior dentition following en masse retraction with
mini-implants by participation of thirty patients meeting eligibility criteria. The
participants will be divided in three groups through software generated randomization table.
Group I (control group; height of anterior power arm 6 mm), Group II and Group III
(experimental groups; height of anterior power arm 3 mm and 9 mm, respectively). Ten patients
will be allocated in each group. En masse retraction with mini implants and various heights
of anterior power arm will be carried out immediately after bilateral maxillary first
premolar extractions using continuous arch sliding mechanics. Horizontal, vertical and
angular dimensions will be measured on lateral cephalograms while the transverse effects will
be measured on maxillary dental cast. Both lateral cephalograms and dental casts will be
obtained at two different point of time; T1, before retraction and T2, after complete
extraction space closure. The data will be assessed with-in and among groups.
