T-loop Spring vs Ricketts Maxillary Canine Retractor in canine retraction efficacy and anchorage loss controlA Cone Beam Computed Tomography evaluation in a two arm parallel group randomized non-controlled clinical trial

Not Applicable

• Conditions: all malocclusion cases with class 2 canine relationship and need to be treated by extraction of only the upper first premolars and actual canine retraction; K07; Dentofacial anomalies [including malocclusion]

• Registration Number: DRKS00023776
• Lead Sponsor: Master student at department of orthodontics, Faculty of dentistry, Damascus University.

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Study Completion: 2020-02-28
• Study Start: 2021-01-20
• Last Update Posted: 19 August 2024

Recruitment & Eligibility

• Status: Complete
• Sex: All
• Target Recruitment: 34

Inclusion Criteria

The clinical inclusion criteria:
- Aging between 14-23 years.
- Having a bilateral class II malocclusion which only needs upper first premolars extraction and canine retraction.
- A full permanent dentition
- Overjet more than 4 mm and less than 8 mm.
- Normal or increased vertical facial high (clinically evaluated).
The radiographic inclusion criteria:
a skeletal class I or class II malocclusion (2< ANB < 9), and normal or long anterior facial height (N-S-Pog = 64°-68°, MM= 25°-31°).

Exclusion Criteria

- The presence of a maxillary canine with excessive malposition or rotation.
- A previous orthodontic treatment undergone.
- Bad oral hygiene.
- The need to extract lower premolars.
- Skeletal deep bite, or decreased anterior facial high.

Study & Design

• Study Type: interventional
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
The quality of the canine retraction: this will be assessed sagittally and vertically by evaluating the canine’ center of resistance (CRs3) sagittal movement amount and rate, the resulted anteroposterior tipping, the in-out rotation; the CRs3 vertical movement amount, and the resulted buccolingual inclination; in addition to the root resorption amount.<br>Two Cone Beam Computed Tomography images (CBCT) will be obtained to evaluate those variables, the first one will be obtained right after the patient is enrolled (T0), the second will be obtained after retraction ends on both sides (T1).

Secondary Outcome Measures

Name	Time	Method
The quality of anchorage control: This will be assessed by evaluating the molar’s center of resistance (CRs6) sagittal movement amount and rate, the resulted tipping and rotation; the CRs6 vertical movement, and the resulted buccolingual inclination.<br>Two Cone Beam Computed Tomography images (CBCT) will be used to evaluate those variables; the first one will be obtained right after the patient is enrolled (T0), the second will be obtained after retraction ends on both sides (T1).