Factors Affecting Attachment Loss in Clear Aligner Treatment

NCT07352644 | Completed

• 1 other identifier: 2022/19
• Study Type: interventional
• Target: 4
• Locations: 1 country
• Sites: 1

Brief Summary

This prospective clinical study evaluated the incidence of composite attachment loss in patients undergoing clear aligner treatment and identified patient-, tooth-, and treatment-related factors associated with attachment debonding. Twenty-one patients were followed for six months, and attachment failures were recorded at routine visits. Outcomes were compared according to attachment type (conventional vs. optimized), attachment size, tooth type, dental arch, and patient-related factors.

Conditions

Malocclusion; Crowded Teeth; Attachment

Keywords

ATTACHMENT; ATTACHMENT LOSS; c; CLEAR ALIGNER TREATMENT

Outcome Measures

Primary Outcomes (1)

• Attachment Loss Rate

  Proportion of composite attachments exhibiting complete detachment or partial debonding (irregular residual composite) during routine follow-up visits. Attachment loss was assessed by direct intraoral examination and tactile verification using a dental explorer.

  6 months

Study Arms (1)

Clear Aligner Treatment

EXPERIMENTAL

Participants received clear aligner therapy (Invisalign®) with composite attachments bonded according to the manufacturer's protocol. Both conventional and optimized attachment types were used as part of the planned orthodontic treatment, and attachment loss was prospectively evaluated over a 6-month follow-up period.

Device: Clear Aligners with Composite Attachments

Interventions

Clear Aligners with Composite Attachments DEVICE

Participants received clear aligner therapy (Invisalign®, Align Technology, San Jose, CA, USA). Composite attachments were bonded according to the manufacturer's protocol using a high-viscosity composite. Both conventional and optimized attachment types were used as part of the planned orthodontic treatment, and attachment loss was prospectively evaluated during a 6-month follow-up period.

Clear Aligner Treatment

Eligibility Criteria

• Age: 12 Years+
• Sex: all
• Healthy Volunteers: No
• Age Groups: Child (0-17), Adult (18-64), Older Adult (65+)

You may qualify if:

• Permanent dentition. Mild to moderate crowding. No history of previous orthodontic treatment with fixed appliances or clear aligners

You may not qualify if:

• Poor oral health. Bruxism. Crown restorations. Dental fluorosis. Enamel hypoplasia or other structural abnormalities affecting attachment bonding

Sponsors & Collaborators

• Bezmialem Vakif University: lead

Study Sites (1)

Bezmialem Vakif University

Istanbul, 34093, Turkey (Türkiye)

Location

MeSH Terms

Conditions

Malocclusion; Crowding

Condition Hierarchy (Ancestors)

Tooth Diseases; Stomatognathic Diseases; Spatial Behavior; Behavior

Study Design

• Study Type: interventional
• Phase: not applicable
• Allocation: NA
• Masking: NONE
• Purpose: TREATMENT
• Intervention Model: SINGLE GROUP
• Sponsor Type: OTHER
• Responsible Party: PRINCIPAL INVESTIGATOR
• PI Title: Assistant Professor

Study Record Dates

• First Submitted: January 12, 2026
• First Posted: January 20, 2026
• Study Start: January 1, 2022
• Primary Completion: June 1, 2022
• Study Completion: June 1, 2022
• Last Updated: January 20, 2026

Record last verified: 2026-01

Data Sharing

• IPD Sharing: Will not share

Locations

TU (1)