History of Changes for Study: NCT05351099
Dental Block for Pain Relief in ED Dental Pain Patients
Latest version (submitted April 22, 2022) on
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Study Record Versions
Version A B Submitted Date Changes
1 April 22, 2022 None (earliest Version on record)
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Study NCT05351099
Submitted Date:  April 22, 2022 (v1)

Open or close this module Study Identification
Unique Protocol ID: 2021094
Brief Title: Dental Block for Pain Relief in ED Dental Pain Patients
Official Title: Efficacy of ED Provider-Performed Dental Block for Pain Relief in Patients Presenting With Dental Pain
Secondary IDs:
Open or close this module Study Status
Record Verification: April 2022
Overall Status: Recruiting
Study Start: March 11, 2022
Primary Completion: March 11, 2025 [Anticipated]
Study Completion: March 11, 2026 [Anticipated]
First Submitted: April 11, 2022
First Submitted that
Met QC Criteria:
April 22, 2022
First Posted: April 28, 2022 [Actual]
Last Update Submitted that
Met QC Criteria:
April 22, 2022
Last Update Posted: April 28, 2022 [Actual]
Open or close this module Sponsor/Collaborators
Sponsor: University of California, San Francisco
Responsible Party: Sponsor
Open or close this module Oversight
U.S. FDA-regulated Drug: No
U.S. FDA-regulated Device: No
Data Monitoring: Yes
Open or close this module Study Description
Brief Summary: This will be a prospective, observational cohort study assessing immediate pain relief from dental block in ED patients presenting with dental pain. The study will be conducted in the Community Regional Medical Center ED. The aim of this study, then, is to prospectively determine if dental block provides minimal clinically important difference in pain relief to these patients.
Detailed Description:

Patients will be provided written and verbal information about the study. If the patient does not agree to be enrolled in the study at that time, the patient will be asked to give the reason for refusing enrollment. The answer will be recorded without patient identifiers.

Dental blocks will be done by EM faculty or residents, physician assistants, and nurse practitioners who are not necessarily study personnel as dental block is routinely done in the ED as standard of care. Dental block will not be performed by medical students or off-service rotating residents.

Currently, providers are asked to undergo a short training session on how to administer a dental block. The training covers:

  • Each type of nerve block and indication
  • Equipment
  • Safety
  • Methods to prevent intra-arterial injection
  • Methods to prevent nerve injury

The education session participation will be tracked by Qualtrics.

Study protocol

  • Patient identified as potential enrollee
  • Research associate will examine the track board to see if "Dental Pain" or other dental complaint is listed for the patient. Research associate will then discuss with the practitioner responsible for the patient whether the patient is a candidate for the study.
  • Practitioners may also identify a patient appropriate for the study and inform the research associate
  • Research personnel works with the Practitioner evaluating patient and asks practitioner questions regarding the inclusion and exclusion criteria
  • If patient meets inclusion criteria and has no exclusion criteria, the research personnel will have the practitioner sign the "Inclusion/Exclusion Criteria" form attesting to this
  • If there are exclusion criteria, this is noted on the "Inclusion/Exclusion Criteria" form (with no patient identifying information) and paper is put in the research file
  • The provider will then ask the patient's permission to be approached about the study before the research associate approaches the patient
  • Research personnel discusses the study with the patient
  • Gives brief intro about the study and its purpose using the Study Participant Information Sheet and gets verbal consent to proceed
  • If patient refuses to be in the study, the research personnel asks the patient if he/she would be willing to fill out the "Reasons that patient meeting inclusion criteria is refusing enrollment" questionnaire, which is at the bottom of the "Inclusion/Exclusion Criteria" form
  • Research personnel completes the "Patient characteristics" form with the help of the practitioner and the patient.
  • The form records demographics, physical/history features, and initial pain VAS
  • Research personnel completes the "Dental Block Procedure Form" and uses it as a guide for the dental block procedure
  • The ED practitioner performs the dental block
  • Standardized equipment will be the following
  • 3-ml syringe
  • Standard 27-gauge needle
  • Standardized local anesthetic: Bupivacaine 0.5%
  • Standardized initial anesthetic amount for each anatomic location
  • Inferior alveolar: 3 mL
  • Posterior superior alveolar: 3 mL
  • Supraperiosteal: 2 mL
  • Research personnel starts the 10-minute clock with the administration of the dental block
  • After 10 minutes, research personnel records the pain VAS for the patient on the Dental Block Procedure form
  • If the practitioner feels that the local anesthetic effect is not sufficient, that practitioner may give further anesthetic as needed
  • The practitioner will still use the standardized equipment and local anesthetic
  • Research personnel starts the 10-minute clock
  • After 10 minutes, research personnel records the pain VAS for the patient on the "Dental Block Procedure" form
  • Repeat this procedure as needed if the practitioner feels another dental block injection is necessary
  • If repeated, this is noted on the form and pain VAS is listed again
  • When the practitioner has made the decision to not give any further dental injection
  • Research personnel, in consultation with the practitioner, completes the "Dental Block Procedure" form
  • Research personnel has patient fill out the portion on the "Dental Block Procedure" form that asks:
  • Would you have dental block procedure done again?
Open or close this module Conditions
Conditions: Dental Pain
Keywords: Dental Block
Inferior alveolar nerve block
Posterior superior alveolar nerve block
supraperiosteal nerve block
Open or close this module Study Design
Study Type: Observational
Observational Study Model: Cohort
Time Perspective: Prospective
Biospecimen Retention:
Biospecimen Description:
Enrollment: 195 [Anticipated]
Number of Groups/Cohorts 0
Open or close this module Groups and Interventions
Open or close this module Outcome Measures
Primary Outcome Measures:
1. Change in Pain Scores on the Visual Analog Scale (VAS)
[ Time Frame: Baseline10 minutes ]

Pre and Post Procedure Pain Scores will be measured on a VAS line comparing pre and post measurements from left to right. Left side indicating no pain all the way to the right indicating a pain score of 10.
Secondary Outcome Measures:
1. Percentage of patients who would have procedure done again
[ Time Frame: 10 minutes ]

Follow-up survey to determine if patient would have the procedure done again
Open or close this module Eligibility
Study Population: Adult patients (aged 18-years or older) presenting to the ED with dental pain in whom the ED practitioner plans to perform a dental nerve block will be enrolled. Enrollment will occur 24 hours a day during all days of the week. Patients meeting eligibility criteria will be assessed for inclusion/exclusion criteria. There will be 195 patients enrolled in the study.
Sampling Method: Non-Probability Sample
Minimum Age: 18 Years
Maximum Age:
Sex: All
Gender Based:
Accepts Healthy Volunteers: No

Inclusion Criteria:

  • Adult patients (>= 18-years-old) presenting to Community Regional Medical Center emergency department with a complaint of dental pain in whom the ED practitioner plans to perform a dental nerve block

Exclusion Criteria:

  • Patient with previous dental block within 24 hours prior to arrival at the ED
  • Refusal of dental block
  • Patient in law enforcement custody
  • Patient unable to be properly informed of study purpose or able to complete pain VAS score due to physical/ mental condition (altered mental status, unstable psychiatric patient)
  • Patient unable to be properly informed of study purpose or able to complete pain VAS score due to language barrier (not English- or Spanish-speaking)
  • Patient with other acute non-dental painful condition making evaluation of dental pain severity vs non-dental pain severity not possible
  • Patient with pain in multiple areas of mouth needing dental block in > 1 anatomic area
  • Patient to have Dental / OMFS ED consult for procedure
Open or close this module Contacts/Locations
Central Contact Person: Brian Chinnock, MD
Telephone: 559-499-6440
Central Contact Backup: Jannet Castaneda, BA
Telephone: 559-994-5893
Study Officials: Brian Chinnock, MD
Principal Investigator
University of California, San Francisco
Locations: United States, California
Community Regional Trauma and Burn Center
Fresno, California, United States, 93721
Contact:Contact: Brian Chinnock, MD 559-499-6400
Contact:Contact: Jannet Castaneda, BA 559-499-6435
Contact:Principal Investigator: Brian Chinnock, MD
Open or close this module IPDSharing
Plan to Share IPD: No
Open or close this module References
Available IPD/Information:

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