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CompletedNCT06272903Updated Mar 19, 2025

Effect of Benzocaine 20% Topical Anesthesia on Pain Levels When Placing Separators in Children Receiving Hall Technique Crowns

An Early Phase 1 interventional study of 20% benzocaine, topical anesthetic and Children's Toothpaste in Effect of Benzocaine on Pain, sponsored by Mohammed Bin Rashid University of Medicine and Health Sciences. Completed at 1 site in United Arab Emirates. Open to participants aged 4 Years to 10 Years, including healthy volunteers. Per ClinicalTrials.gov, last updated 2025-03-19.

Sponsored by Mohammed Bin Rashid University of Medicine and Health Sciences · Early Phase 1, Interventional, and Treatment

Phase
Early Phase 1
Study type
Interventional
Enrollment
32
Allocation
Randomized
Ages
4 Years to 10 Years
Sex
All
01

Study summary

The goal of this RCT is to investigate the immediate effect of benzocaine 20% topical anesthesia on initial pain and discomfort levels associated with the placement of elastomeric orthodontic separators in children who are receiving Hall Technique crowns on primary molars, among children who have attended the Pediatric Dentistry Department, Dubai Dental Hospital (DDH), Mohammed Bin Rashid University (MBRU) in Dubai, the United Arab Emirates (UAE).

Read the detailed description

The primary objective of this RCT is to assess the immediate effect of benzocaine 20% topical anesthesia on the initial pain and discomfort experienced during the placement of elastomeric orthodontic separators in pediatric patients undergoing Hall Technique crowns for their primary molars. This study will be conducted among children aged 4-10 years old, receiving dental care at the Pediatric Dentistry Department of Dubai Dental Hospital (DDH), Mohammed Bin Rashid University (MBRU) in Dubai, United Arab Emirates (UAE).

The research will involve recruiting a sample of 32 pediatric patients aged between 4 and 10 years who require 2 Hall Technique crowns on their primary molars and are scheduled to undergo the placement of elastomeric orthodontic separators as part of their treatment. The participants will be randomly assigned to receive benzocaine 20% topical anesthesia prior to separator placement on either the right or left side of their mouth, and the other side receiving a placebo (e.g., children's toothpaste) before separator placement.

Data collection: following the placement of elastomeric orthodontic separators, participants will be asked to rate their pain and discomfort levels immediately after the procedure using the Wong-Baker FACES Pain Rating Scale.

In addition to pain and discomfort assessments, demographic data (e.g., age, gender) and clinical information (e.g., specific teeth undergoing treatment) will be collected for each participant. The study will employ rigorous blinding procedures to ensure that the participants are unaware of the assigned treatment (benzocaine or placebo) during the procedure and data collection phases. The principle investigator will only be aware of which side of the mouth will be receiving benzocaine just before the procedure via a sealed envelope randomisation.

Statistical analyses will be conducted to compare the pain and discomfort levels between the two treatment groups. The findings of this study will contribute valuable insights into the efficacy of benzocaine 20% topical anesthesia in managing pain associated with elastomeric orthodontic separator placement in pediatric dental patients undergoing Hall Technique crown procedures. Ultimately, the results will inform clinical practice and improve the quality of care provided to pediatric patients undergoing dental procedures.

02

Conditions studied

  • Effect of Benzocaine on Pain
03

In context

Lead sponsor

Mohammed Bin Rashid University of Medicine and Health Sciences is the lead sponsor of 20 studies on the registry; 11 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
4 Years to 10 Years
Sexes eligible
All
Accepts healthy volunteers
Yes

Inclusion criteria

  • Children with asymptomatic non pulpally involved carious primary molars who meet the indications of the HT in Dubai Dental Hospital.
  • Children who require same tooth bilateral HT Crowns in either bilateral or diagonal pattern.
  • Healthy male and female children, aged 4-10 years (ASA 1) with no conditions that affect sensory input/reaction.
  • Children who are verbal and able to communicate.
  • Not taking any painkillers, or other drugs that would influence with their pain perception.
  • Cooperative children.
  • Parents or guardians who consent for their children to be enrolled in the trial.

Exclusion criteria

Exclusion Criteria:

  • Children who are indicated for bilateral HT but do not require EOS, due to pre-existing interdental spaces.
  • Children who are indicated for bilateral HT but parents prefer or indicate preference for the Modified HT.
  • Children with allergies to nickel or other metal components that constitute a PMC.
  • Those with reported allergies to topical or local anesthetic.
  • Children with special health care needs or those who are non-verbal and are unable to communicate their pain levels.
  • Children/parents/guardians not willing to participate in the study.
  • Patients that require treatment under conscious sedation or general anesthesia.
05

Study design

Phase
Early Phase 1
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
Double (Investigator, Outcomes assessor)
Enrollment
32 participants (actual)

Study arms

  • Experimental
    Benzocaine 20% Topical Anesthesia Arm

    Participants will be assigned this arm either to their right or left hand side of their mouth. They will receive benzocaine 20% topical anesthesia prior to the placement of elastomeric orthodontic separators. The topical anesthesia will be applied according to standard clinical practice. Pain and discomfort levels associated with the placement of separators will be assessed immediately after the procedure.

    Drug: 20% benzocaine, topical anesthetic

  • Placebo comparator
    Placebo (Children's Toothpaste) Arm

    The other side of the mouth will receive a placebo, which consists of children's toothpaste, prior to the placement of elastomeric orthodontic separators. The toothpaste will be applied according to standard clinical practice. Pain and discomfort levels associated with the placement of separators will be assessed immediately after the procedure.

    Other: Children's Toothpaste

Interventions

  • Drug20% benzocaine, topical anesthetic

    Indicated as a topical anesthetic for use on oral mucosa prior to local anesthetic injections, scaling and prophylaxis. Also useful to relieve discomfort associated with taking impressions and intra- oral radiographs. The benzocaine topical anesthetic will be applied according to standard clinical practice, aiming to provide local anesthesia to the treatment site and minimize discomfort during the procedure (placing elastomeric orthodontic separators).

  • OtherChildren's Toothpaste

    Strawberry-flavored children's toothpaste available in Dubai, UAE.

06

What researchers measure

Primary outcomes

  1. Immediate Pain Levels

    The primary outcome measure is the immediate pain and discomfort experienced by children following the placement of EOSs in the context of placing them before the Hall Technique Crown is placed. It will be assessed using a standardized pain scale (Wong-Baker Faces pain scale) where the participants will rate their pain levels immediately after the procedure.

    Time frame: Immediate (within 30 seconds of placing elastomeric orthodontic separators)

Secondary outcomes

  1. Patient Satisfaction During Procedure

    I will be gathering feedback from the children regarding their overall satisfaction with the procedure by using the Wong-Baker Faces pain scale. This will enable us to gauge the acceptability of placing the elastomeric orthodontic separators.

    Time frame: Immediate (within 30 seconds)

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Study locations

1 site
  • Mohammed Bin Rashid University Of Medicine and Health Sciences
    Dubai, United Arab Emirates
08

References and documents

Publications

  • Hussein I, Al Halabi M, Kowash M, Salami A, Ouatik N, Yang YM, Duggal M, Chandwani N, Nazzal H, Albadri S, Roberts A, Al-Jundi S, Nzomiwu C, El Shahawy O, Attaie A, Mohammed O, Al-Sane M. Use of the Hall technique by specialist paediatric dentists: a global perspective. Br Dent J. 2020 Jan;228(1):33-38. doi: 10.1038/s41415-019-1100-2. PubMed 31925371 ↗
  • Boyd DH, Foster Page LA, Moffat SM, Thomson WM. Time to complain about pain: Children's self-reported procedural pain in a randomised control trial of Hall and conventional stainless steel crown techniques. Int J Paediatr Dent. 2023 Jul;33(4):382-393. doi: 10.1111/ipd.13059. Epub 2023 Mar 16. PubMed 36841968 ↗
  • Lee HS. Recent advances in topical anesthesia. J Dent Anesth Pain Med. 2016 Dec;16(4):237-244. doi: 10.17245/jdapm.2016.16.4.237. Epub 2016 Dec 31. PubMed 28879311 ↗
  • Aghababaie ST, Monteiro J, Stratigaki E, Ashley PF. Techniques for effective local anaesthetic administration for the paediatric patient. Br Dent J. 2020 Dec;229(12):779-785. doi: 10.1038/s41415-020-2453-2. Epub 2020 Dec 18. PubMed 33339924 ↗
  • Bird SE, Williams K, Kula K. Preoperative acetaminophen vs ibuprofen for control of pain after orthodontic separator placement. Am J Orthod Dentofacial Orthop. 2007 Oct;132(4):504-10. doi: 10.1016/j.ajodo.2006.11.019. PubMed 17920504 ↗
  • Farzan A, Khaleghi K. The Effectiveness of Low-Level Laser Therapy in Pain Induced by Orthodontic Separator Placement: A Systematic Review. J Lasers Med Sci. 2021 Jun 24;12:e29. doi: 10.34172/jlms.2021.29. eCollection 2021. PubMed 34733752 ↗
  • Al-Melh MA, Nada A, Badr H, Andersson L. Effect of an Anesthetic Chewing Gum on the Initial Pain or Discomfort from Orthodontic Elastomeric Separator Placement. J Contemp Dent Pract. 2019 Nov 1;20(11):1286-1292. PubMed 31892680 ↗
  • Eslamian L, Borzabadi-Farahani A, Edini HZ, Badiee MR, Lynch E, Mortazavi A. The analgesic effect of benzocaine mucoadhesive patches on orthodontic pain caused by elastomeric separators, a preliminary study. Acta Odontol Scand. 2013 Sep;71(5):1168-73. doi: 10.3109/00016357.2012.757358. Epub 2013 Jan 10. PubMed 23301559 ↗
  • Meechan JG. Intraoral topical anesthesia. Periodontol 2000. 2008;46:56-79. doi: 10.1111/j.1600-0757.2008.00231.x. No abstract available. PubMed 18201346 ↗
  • Falci SG, Marques LS. CONSORT: when and how to use it. Dental Press J Orthod. 2015 May-Jun;20(3):13-5. doi: 10.1590/2176-9451.20.3.013-015.ebo. No abstract available. PubMed 26154451 ↗
  • Garrocho-Rangel A, Ruiz-Rodriguez S, Gaitan-Fonseca C, Pozos-Guillen A. Randomized Clinical Trials in Pediatric Dentistry: Application of Evidence-Based Dentistry through the CONSORT Statement. J Clin Pediatr Dent. 2019;43(4):219-230. doi: 10.17796/1053-4625-43.4.1. Epub 2019 May 16. PubMed 31094627 ↗
  • Eslamian L, Kianipour A, Mortazavi SAR. The Analgesic Efficacy of 5% Naproxen Gel for Pain Associated with Orthodontic Separator Placement: A Randomized Double-Blind Controlled Trial. Anesth Pain Med. 2017 Mar 8;7(2):e42708. doi: 10.5812/aapm.42708. eCollection 2017 Apr. PubMed 28824857 ↗

Individual participant data

Plan to share: No

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Mar 19, 2025, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT06272903
Lead sponsor
Mohammed Bin Rashid University of Medicine and Health Sciences
Responsible party
Simran Kaur Sura (Resident - Pediatric Dentistry, Mohammed Bin Rashid University of Medicine and Health Sciences) — Principal investigator
First posted
Feb 22, 2024
Start date
Apr 14, 2024
Primary completion
Dec 16, 2024
Completion
Dec 16, 2024
Last update
Mar 19, 2025

Study contacts

Simran Kaur Sura
principal investigator · Mohammed Bin Rashid University of Medicine and Health Sciences

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is completed, as verified in Feb 2024. You cannot join it, but the record below documents what was studied.

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