Clinical efficiency of two sequences of orthodontic wires to correct crowding of the lower anterior teeth

Not Applicable

Terminated

• Conditions: Crowded teeth, orthodontic treatment, Malocclusion, Orthodontic Wires; C07.793.494; E06.658.453.684

• Registration Number: RBR-7g5zng
• Lead Sponsor: Centro Universitário do Maranhão

Brief Summary

Not available

Detailed Description

Not available

Study Timeline

• Results First Posted: 1900-01-01
• Study Start: 2015-03-17
• Last Update Posted: 29 May 2023

Recruitment & Eligibility

• Status: Terminated
• Sex: Not specified
• Target Recruitment: Not specified

Inclusion Criteria

Moderate mandibular anterior crowding (3-6 mm); all teeth present in the mandibular arch, up to second molars; no prescription for extractions in the mandibular arch; no need for treatment with intermaxillary elastics, interproximal stripping, open NiTi compression springs or active labial bow; no diseases that might affect tooth movement; and significant tooth size and shape abnormalities.

Exclusion Criteria

Patients with a history of trauma; resorption and that, for any reason, did not visit the clinic for more than a month; whose mandibular appliance broke; who had undergone previous orthodontic treatment .

Study & Design

• Study Type: Intervention
• Study Design: Not specified

Primary Outcome Measures

Name	Time	Method
Correction of mandibular anterior crowding using two arch wire sequences, one with conventional nickel-titanium arch wires and the other with heat-activated NiTi arch wires, according to the irregularity index defined by Little. The time to complete alignment was considered. This time was compared between groups using the log-rank test (Mantel Cox). ;The sequence that included heat-activated wires, alignment and leveling of mandibular anterior teeth was completed earlier than in the group treated only with conventional NiTi arch wires (log rank=5.996; p<0.05).

Secondary Outcome Measures

Name	Time	Method
Minimum time correction of crowding of the lower anterior teeth according to the irregularity index defined by Little.The shortest time to complete alignment was considered.;The minimum period required to correct the crowding of lower anterior teeth was less than six months in 100% of cases in the group of patients who used heat-activated NiTi wire, while only 72.7% of cases treated with the NiTi sequence were completely corrected within this same period.