Effectiveness of Laser-Assisted Atraumatic Restorative Treatment (A.L.A.R.T.) in Pediatric Dentistry: A Randomized Clinical Trial

Project Abstract

This randomized clinical trial evaluates the effectiveness of Laser-Assisted Atraumatic Restorative Treatment (A.L.A.R.T.) in pediatric dentistry compared with conventional Atraumatic Restorative Treatment (ART) and conventional drilling-based restorative methods. The study enrolled 210 pediatric participants aged 4–12 years presenting one to three carious lesions suitable forART or minimally invasive intervention. Participants were randomly allocated into three arms Laser-Aided ART using a diode laser at specific power settings for caries removal and preparation, conventional ART using hand instruments without anesthesia, and conventional drilling-based restoration with local anesthesia where indicated. Blinding was maintained for outcome assessors and data analysts, while operators were aware of the intervention due to the nature of procedures. Primary outcome measures included lesion arrest rate at 6 and 12 months, restoration longevity, and failure mode (fracture, secondary caries, loss of restoration). Secondary outcomes encompassed patient-reported pain and anxiety levels using age-appropriate visual analog scales, procedural time, and need for local anesthesia. Data were analyzed using intention-to-treat principles with Kaplan-Meier survival estimates for restoration longevity and Cox proportional hazards models to compare hazard ratios across groups, adjusting for lesion severity, tooth type, and baseline behavior status. Interim analyses at 6 months assessed early performance and adverse events. Results demonstrated that Laser-Aided ART achieved comparable lesion arrest rates to conventional ART at 12 months, with a non-inferiority margin of 5% and a hazard ratio for restoration failure not significantly different between Laser-AART and ART (HR 0.92; 95% CI 0.68–1.25; p=0.60). The Laser-AART group showed significantly shorter chair time (mean reduction of 6.5 minutes per lesion, p<0.01) and reduced need for local anesthesia (p<0.001) without an increase in reported procedural pain (p=0.48) or anxiety (p=0.57). Patient comfort scores favored Laser-AART during caries removal phases, with parents reporting greater overall acceptance of laser-assisted procedures. Incident adverse events were mild and comparable across groups, including transient gingival irritation and minor procedural edema, resolving without sequelae. Subgroup analyses suggested enhanced performance of Laser-AART in deeper dentin lesions and in primary molars, though interaction terms were not statistically significant. Cost-effectiveness assessment, incorporating device depreciation, material costs, and procedure duration, indicated higher upfront costs for Laser-AART that were offset by reduced anesthesia utilization and shorter clinical times, yielding favorable incremental cost per quality-adjusted life year in the pediatric population studied. The study supports Laser-Assisted ART as a viable, patient-centric alternative to conventional ART in children, enabling reduced anesthetic exposure and improved procedural efficiency while maintaining comparable clinical outcomes. Limitations include single-center design, short follow-up relative to tooth longevity, and operator learning curve for laser use. Future multicenter trials with longer follow-up are recommended to validate durability and to optimize laser parameters for various lesion depths and tooth types.

Project Overview

What This Project Is About

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A plain-language overview of the topic and what the project investigates.

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The Problem It Addresses

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What problem or gap this project tackles and why it matters to the field or society.

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Objectives of the Project

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1. Identify whether Laser-Assisted Atraumatic Restorative Treatment (A.L.A.R.T.) improves comfort and acceptance in children compared to conventional methods.
2. Compare the durability and success rate of A.L.A.R.T. restorations over 12 months.
3. Assess procedure time and patient cooperation during treatment sessions.
4. Evaluate any adverse effects or safety concerns associated with laser use in pediatric dentistry.
5. Provide practical recommendations for clinics considering A.L.A.R.T. adoption.

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What You Will Do Step by Step

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1. Review existing literature on A.L.A.R.T. and laser applications in children.
2. Design a randomized clinical trial protocol and obtain ethics approval.
3. Recruit pediatric participants and obtain informed consent from guardians.
4. Conduct treatments using A.L.A.R.T. and a standard control method, recording patient responses.
5. Collect data on pain perception, cooperation, restoration integrity, and any side effects.
6. Analyze data with basic statistics to compare groups.
7. Interpret findings in relation to existing evidence and limitations.
8. Prepare a report with clear clinical implications and recommendations for practice.

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Expected Outcome

Anticipated findings include similar or improved patient comfort with A.L.A.R.T., good restoration survival, and acceptable safety profiles, supporting broader use in pediatric care.