Survival Rate of Two Types of Multistranded Fixed Retainers

1. Why is this study being done? After orthodontic treatment (such as braces), teeth can move back toward their original positions. To prevent this, orthodontists use retainers during the retention phase of treatment. One common option is a fixed retainer, which is a thin wire bonded to the inside surfaces of the front teeth. Fixed retainers help keep teeth in their corrected positions for many years. There are different types of fixed retainers, and they differ in how the wire is made. However, it is still unclear which type works best and lasts the longest. Some retainers may break, come loose, or make oral hygiene more difficult. This study aims to compare two commonly used types of fixed retainers to determine which one performs better over time. 2. What is the purpose of the study? The main goal of this study is to find out whether the type of fixed orthodontic retainer affects how long it remains intact and functional after orthodontic treatment. The study will also evaluate whether the type of retainer influences: \- patient comfort and satisfaction \- ease of maintaining oral hygiene * gum and periodontal health * stability of tooth alignment after treatment. 3. Who can participate? People may be eligible to participate if they: \- are 15-50 years old \- have completed orthodontic treatment * have all lower front teeth present * have healthy gums and teeth in the lower front area. Some patients will not be eligible if they have active gum disease or need additional dental treatment in the lower front teeth. 4. What will happen during the study? Participants who agree to take part will be randomly assigned to receive one of two types of fixed retainers. Random assignment means that a computer will decide which retainer each participant receives, similar to drawing lots. The two types of retainers being compared are: 1. Round twisted wire retainer (3-strand stainless steel wire) 2. Braided rectangular wire retainer (8-strand braided wire) Both types are commonly used in orthodontic practice. 5) What will participants need to do? At the start of the study, the orthodontic appliance (braces) will be removed and the retainer will be bonded to the lower front teeth. Participants will attend follow-up visits over two years: * at the start of the study * after 3, 6,12, 18, and 24 months. During these visits, the research team will: \- check whether the retainer is still intact \- examine gum health * take dental impressions and photographs * ask participants to complete a short questionnaire about comfort and oral hygiene. 6\) What are the possible risks? The study procedures are the same as those commonly used in routine orthodontic care. Possible minor discomforts may include: \- mild discomfort during gum examination \- temporary discomfort when dental impressions are taken. No additional invasive procedures are planned. 7) Are there any benefits? Participants may benefit from: \- regular monitoring of their retainer * routine evaluation of gum health * early detection of any problems with the retainer. The results of this study may help orthodontists choose the most reliable retainer for future patients. 8\) Is participation voluntary? Yes. Taking part in the study is completely voluntary. Participants may withdraw from the study at any time without affecting their orthodontic care. Personal information will be kept confidential and securely stored.

NCT Number	NCT07476950
Lead Sponsor	Piotr Fudalej
Conditions	Orthodontic Retention
Enrollment	133 participants
Start Date	2014-12-01
Primary Completion	2026-07-01 (estimated)
Study Completion	2026-12-01 (estimated)
Updated on ClinicalTrials.gov	2026-03-17