The effect of different loading times on loosening of miniscrews in orthodontic patients

The Comparison of Clinical Success Rates of Orthodontic Miniscrews with three different loading times: immediately, six and fourteen weeks after miniscrew placement in orthodontic patients

Status

Active, not recruiting

Phases

Phase 3

Study type

Interventional

Source

IRCT

Registry ID

IRCT201311069569N2

Enrollment

180

Registered

2014-12-06

Start date

2013-12-01

Completion date

Unknown

Last updated

2018-02-22

For informational purposes only — not medical advice. Sourced from public registries and may not reflect the latest updates. Terms

Conditions

Orthodontic Anchorage Procedures. Adjustment and management of other implanted devices

Interventions

Intervention 1: 180 miniscrews manufactured by Jeil Company, with a diameter of 1.6mm and a length of 11mm will be inserted in 90 patients. During insertion of miniscrew, insertion torque will be meas

Treatment - Other

180 miniscrews manufactured by Jeil Company, with a diameter of 1.6mm and a length of 11mm will be inserted in 90 patients. During insertion of miniscrew, insertion torque will be measured by torque m

Eligibility

Sex/Gender

All

Age

10 Years to 45 Years

Inclusion criteria

Inclusion criteria: Inclusion criteria: A treatment plan to insert miniscrews on both sides of maxilla between the second premolar and the first molar for retraction of anterior teeth. Exclusion criteria: Any disease compromising bone quality like osteoporosis, osteomalasia, and osteopetrosis.

Exclusion criteria

Exclusion criteria:

Design outcomes

Primary

Measure	Time frame
Mobility in the miniscrews. Timepoint: Three weeks after miniscrew placement, six weeks after miniscrew placement, ten weeks after miniscrew placement and then every 4 weeks. Method of measurement: By placing a calibrated probe on the miniscrew and lateral movement, if mobility is greater than 0.5 millimeter, the miniscrew is designated mobile.;Mobility in two groups less than 16 years old and older than 16 years old. Timepoint: Three weeks after miniscrew placement, six weeks after miniscrew placement, ten weeks after miniscrew placement and then every 4 weeks. Method of measurement: By placing a calibrated probe on the miniscrew and lateral movement, if mobility is greater than 0.5 millimeter, the miniscrew is designated mobile.	—

Measure

Time frame

Mobility in the miniscrews. Timepoint: Three weeks after miniscrew placement, six weeks after miniscrew placement, ten weeks after miniscrew placement and then every 4 weeks. Method of measurement: By placing a calibrated probe on the miniscrew and lateral movement, if mobility is greater than 0.5 millimeter, the miniscrew is designated mobile.;Mobility in two groups less than 16 years old and older than 16 years old. Timepoint: Three weeks after miniscrew placement, six weeks after miniscrew placement, ten weeks after miniscrew placement and then every 4 weeks. Method of measurement: By placing a calibrated probe on the miniscrew and lateral movement, if mobility is greater than 0.5 millimeter, the miniscrew is designated mobile.

—

Secondary

Measure	Time frame
Amount of insertion torque of the miniscrews. Timepoint: during insertion of miniscrews. Method of measurement: Torque measurement device (Orthonia, JEIL Company).	—

Countries

Iran (Islamic Republic of)

Contacts

Public ContactAmir Mohammadi

Department of orthodontics of dental faculty of Tabriz university of medical sciences

amirortho@gmail.com+98 413335596

Outcome results

None listed

Source: IRCT (via WHO ICTRP) · Data processed: Feb 4, 2026