Reversal of Anaesthesia with Diode Laser

Background: After local anesthesia, which is frequently used in pediatric dentistry, long-term soft tissue numbness can cause various problems. The aim of this study was to evaluate the effectiveness of PBMT in reversing soft tissue anaesthesia in children following local anaesthesia administration.

Methods: In a split-mouth randomized study, 40 children aged 4 to 9 years, eligible to receive local infiltration injection on both maxillary (n=20) and mandibular (n=20) right and left sides, will included. Maxillary and mandibular quadrants will be randomly assigned to laser or sham laser groups. Normality will assessed using the Kolmogorov-Smirnov test. Categorical variables between laser and control groups will compared using the McNemar paired sample test. Significance will be set at p<0.05.

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Key information

Conditions

Photobiomodulation Therapy

Age range

4 year–9 year

Sex eligibility

All sexes

Study type

Interventional

Phase

Not applicable

Primary location

Recep Tayyip Erdoğan University, Faculty of Dentistry

Rize, Rize Province, 53100, Turkey (Türkiye)

Who can participate

Healthy volunteers accepted: Yes

Only the study team can determine whether someone qualifies for participation.

Inclusion criteria

- Children whose parents signed the written informed consent form and who themselves gave assent,
Children with a Frankl behaviour rating scale score of 3 or 4,
Children aged between 4 and 9 years old who can understand soft tissue sensation and respond to it,
Children requiring treatment with local infiltration anaesthesia for multiple teeth in both the mandible and maxilla,
Children with no history of allergy to materials used for anaesthesia or sulphite,
Children who have not taken any analgesic medication at least 24 hours before treatment,
Children without any systemic conditions that would interfere with dental treatment under local anaesthesia.

Exclusion criteria

Occurrence of an error during anaesthesia injection resulting in insufficient anaesthesia for treatment,
Inability of the patient to provide clear assessments of response to soft tissue anaesthesia,
Presence of systemic conditions that would prevent anaesthesia administration or dental treatment,
Children requiring urgent dental treatment priority such as acute painful teeth.

Treatment and study plan

Actual laser application

Device

At approximately 45 minutes into the treatment session, subjects in the laser group received irradiation from a 4 W power, 810 nm diode laser (Fox; ARC Laser, GmbH, Nürnberg, Germany). The laser was operated in continuous mode, delivering 12-second shots per point using a therapy head with a point size of 0.38 cm². Each point received 6.3 J/cm² of laser energy, resulting in a total energy density of 37.8 J/cm² across 6 points.

Sham laser application

Device

Sham laser was applied symbolically as a diffused closed laser (targeted beam) at the same distance and simultaneously. Evaluations after laser irradiation were conducted by a responsible specialist physician who was not involved in performing the treatment procedures.

Primary outcomes

Anesthesia reversal time

Time frame: up to 30 minutes after procedure

Until the first reversal of anesthesia, a palpation technique will be used to record every 10 minutes. With this technique, the presence of a sense of touch and tingling will be questioned. In order to obtain an objective answer, the child will be asked whether he/she knows what a tingling sensation is based on his/her previous experiences and will be told what and how this sensation is.

Sponsors and collaborators

Lead sponsor

Recep Tayyip Erdogan University

Other

Registry information

Official study title

Evaluation of Photobiomodulation Therapy with Diode Laser in Reversal of Maxillary and Mandibular Soft Tissue Local Anaesthesia in Paediatric Dentistry: Randomized Clinical Trial:a Randomized Clinical Trial

Important dates

Study start: 2023
Primary completion: 2024
Study completion: 2024
First posted: Feb 24, 2025
Registry last updated: Feb 24, 2025

OpenTrials presents study information sourced from ClinicalTrials.gov. The official registry record should be consulted for the latest information.

View the official ClinicalTrials.gov record (opens in a new tab)

This listing is for discovery and informational purposes only. It is not medical advice, does not guarantee that a study is recruiting, and does not determine eligibility. Contact the study team and a qualified healthcare professional when considering participation.

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