Clinical Performance of a New Esthetic, Self-ligating Orthodontic Bracket

Not Applicable

Completed

• Conditions: Malocclusion
• Interventions: Device: Lower Anterior EXD-952 Self-ligating Brackets

• Registration Number: NCT02959671
• Lead Sponsor: University of Minnesota

Brief Summary

A cohort of 15 patients starting orthodontic treatment with fixed appliances will receive EXD-952 Ceramic Self-ligating brackets on all mandibular incisors and a different type of brackets on the remaining mandibular teeth. Tooth movement will be initiated using 0.014" or 0.016" Nickel-Titanium archwires.

A second cohort of 15 patients will receive EXD-952 Ceramic Self-ligating bracket on all mandibular incisors in a later phase of their ongoing orthodontic treatment. The mandibular incisor brackets will be removed and EXD-952 Ceramic Self-ligating brackets placed instead. Other mandibular brackets will remain in place. Tooth movement will be performed using 0.019x0.025" Stainless Steel archwires.

In both cohorts bracket door stability, the ability of the door to hold the archwire in the bracket slot, the bracket's ability to rotate teeth, clinicians' satisfaction with the bracket, and patient comfort in comparison with other brackets will be assessed.

The evaluation for each patient will last for at least until one archwire change (cohort 1) or one appointment interval (6-8 weeks, cohort 2).

After the evaluation period, EXD-952 Ceramic Self-ligating brackets will remain in place until the orthodontic treatment is completed.

Detailed Description

Not available

Study Timeline

• Study First Submitted: 2016-11-02
• Study First Submitted QC: 2016-11-07
• Study First Posted: 2016-11-09
• Study Start: 2017-01
• Primary Completion: 2020-01
• Study Completion: 2020-01
• Status Verified: 2020-12
• Results First Submitted: 2020-12-18
• Results First Submitted QC: 2020-12-18
• Last Update Submitted: 2020-12-18
• Results First Posted: 2021-01-14
• Last Update Posted: 2021-01-14

Recruitment & Eligibility

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

Inclusion Criteria

• Permanent mandibular dentition including incisors, canines, premolars, and first molars (includes subjects treated with the extraction of premolars)
• Mandibular incisors with sound, non-carious buccal enamel and no pretreatment with chemical agents such as hydrogen peroxide

Read More

Exclusion Criteria

• Mental/emotional/developmental disability
• Inability to give informed consent
• Cleft lip and/or palate, craniofacial anomaly, or syndrome
• Obvious oral hygiene issues such as excessive plaque accumulation, gingivitis, and/or pre-existing white spot lesions
• Prosthodontic or restored substrate extending on the labial surface of mandibular incisors
• Deep bite
• Known allergies to any study materials

Read More

Study & Design

• Study Type: INTERVENTIONAL
• Study Design: SINGLE_GROUP

Arm && Interventions

Group	Intervention	Description
Lower Anterior EXD-952 Self-ligating Brackets	Lower Anterior EXD-952 Self-ligating Brackets	-

Primary Outcome Measures

Name	Time	Method
Ability of Door to Successfully Hold the Archwire in the Bracket Slot	baseline	The ability of door to hold the archwire in the bracket slot is assessed at the time of bracket placement. If the door is unable to hold the archwire, then spontaneous door opening occurs. Each bracket has 4 doors. Outcome is reported as the percent of bracket doors that successfully held the archwire within the bracket slot at bracket placement. Number of successful bracket doors/number of total bracket doors across all participants \* 100. Unit of measure is "percentage of bracket doors."
Patient Comfort in Comparison With Other Brackets (Questionnaire)	6-8 weeks	The patient's comfort in comparison with other brackets will be assessed after the first archwire change (expected 6-8 weeks after initial bonding). Patients will rate their satisfaction on a 5-point Likert scale (Very unsatisfied, somewhat unsatisfied, neutral, somewhat satisfied, very satisfied). A rating of 4 (somewhat satisfied) or 5 (very satisfied) is considered successful. Outcome is reported as the percent of participants who rated their comfort in comparison with other brackets as somewhat satisfied or very satisfied.
Bracket Door Stability	baseline	The stability of the bracket door is assessed at the time of bracket placement. Each bracket has 4 doors. Outcome is reported as the percent of bracket doors across all participants that break at bracket placement. Number of total broken bracket doors/number of total bracket doors across all participants \* 100. Unit of measure is "percentage of bracket doors."
Bracket's Ability to Rotate Teeth	6-8 weeks	The bracket's ability to rotate teeth will be assessed after the first archwire change (expected 6-8 weeks after initial bonding). Clinician will rate rotational correction as adequate or not adequate. Outcome is reported as the percent of participants for whom the clinician rated rotational correction as adequate.
Clinicians' Satisfaction With the Bracket	6-8 weeks	The clinician's satisfaction with the bracket will be assessed after the first archwire change (expected 6-8 weeks after initial bonding). Clinician will rate their satisfaction on a 5-point Likert scale (Very unsatisfied, somewhat unsatisfied, neutral, somewhat satisfied, very satisfied). A rating of 4 (somewhat satisfied) or 5 (very satisfied) is considered successful. Outcome is reported as the percent of participants for whom the clinician rated bracket satisfaction as somewhat satisfied or very satisfied.

Trial Locations

Locations (1)

University of Minnesota; 🇺🇸 Minneapolis, Minnesota, United States