Evaluation of Root Resorption During the Correction of Deep Bite With the Help of Laser Irradiation

Damascus University

Status: Completed

Conditions: Deep Overbite

Treatments: Device: Traditional orthodontic treatment; Device: Low-Level Laser

Study type: Interventional

Funder types: Other

Identifiers

NCT05734092

UDDS-Ortho-02-2023

Details and patient eligibility

About

This study aims to investigate the effectiveness of low-level laser in reducing the resorption of the roots of the upper incisors. Participants will be recruited from patients who will attend the Department of Orthodontics and Dentofacial Orthopaedics at Damascus University. The study sample will consist of 30 patients with a deep bite who will be randomly distributed equally into two groups, 15 patients in each group, average age: 22.37±3.38 years. Mini-implants will apply between the roots of the maxillary central and lateral incisor at both sides with a loading force of 40 g on each end by using a nickel-titanium spring extending from the head of the mini-implants to a wire welded to it with two hooks. A low-level laser (Ga-Al-As) will be used with 808 nm wavelength in continuous mode, 250 milli-Watt power output, 4 Joules/point energy density, 16 s per point in the experimental group. It will be applied on the day of intrusion, then on days 3,7, and 14 of the first month, and then every 15 days starting from the second month until the end of the intrusion. In addition to adjusting the force gauge every 4 weeks until the end of the intrusion stage and reaching normal coverage will be activated every 4 weeks in both groups until normal overbite was reached.

Full description

Several studies have indicated the effectiveness of the LLLT in accelerating orthodontic movement, but studies that have evaluated the role of this laser in reducing the risk of OIIRR have been limited. Moreover, the effects of laser in reducing root resorption have been studied with different types of orthodontic movements such as en masse anterior retraction, canine retraction, and tilting of the premolars before extraction, but they have not been studied with the intrusion movement

Enrollment: 30 patients

Sex: All

Ages: 18 to 30 years old

Volunteers: No Healthy Volunteers

Inclusion criteria

1. overbite > 4 mm
2. Class I or II molar and canine relationship malocclusion
3. maxillary anterior crowding < 2 mm
4. maxillary incisors positioned below the functional occlusal plane
5. incisor display of 2-3 mm or more at rest
6. the facial growth pattern is normal or horizontal.

Exclusion criteria

1. the maxillary incisors had a history of any trauma or endodontic treatment
2. increased inclination of the maxillary incisors towards the labial
3. the subject had any systemic disease
4. the patient exhibited poor oral hygiene

Trial design

Primary purpose: Treatment

Allocation: Randomized

Interventional model: Parallel Assignment

Masking: Single Blind

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30 participants in 2 patient groups

Control group

Active Comparator group

Description:

The strength of the nickel-titanium coil will be adjusted every 4 weeks to the required strength of 40 g on each end until reaching normal coverage

Treatment:

Device: Traditional orthodontic treatment

Low-Level Laser Therapy group

Experimental group

Description:

In the experimental group (LLLT), where a (Ga-Al-As) diode laser, will be used with 808 nm wavelength in continuous mode, 250 milli-Watt power output, 4 Joules/point energy density, 16 s per point. In addition to adjusting the force gauge every 4 weeks until the end of the intrusion stage and reaching normal coverage

Treatment:

Device: Low-Level Laser