Anesthesia, Local Clinical Trial
Official title:
A Split Mouth, Randomised Controlled Trial to Compare the Efficacy of an Array of 2x3 Pyramidal Microneedles of 280µm Height Versus a Standard 30-gauge Dental Needle in the Delivery of Local Anaesthetic Solution for Dental Procedures
The study will be completed as a two part, prospective, single-centre, randomised controlled
trial.
Five volunteers (dentists) will be recruited in the first part of the study to evaluate and
examine the microneedle device and its use. Based on those qualitative findings (individual
interviews and focus group) modifications to the microneedle device will be implemented
before part two of the study commences.
Twenty volunteers will be enrolled in the second part of the study. A split mouth design will
be used to compare the efficacy of an array of 2x3 pyramidal wet-etch silicone microneedles
of 280µm height with a standard 30-gauge short hypodermic needle in the delivery of local
dental anaesthetic solution. Quantitative and qualitative measurements of the pain
experienced and the depth of anaesthesia achieved will be recorded and compared.
The study will be completed as a two part, prospective, single-centre, randomised controlled
trial.
Five volunteers (dentists) will be recruited in the first part of the study in order to
evaluate and examine the microneedle device and its use. Based on those qualitative findings
(individual interviews and focus group) modifications to the microneedle device will be
implemented before part two of the study commences.
Twenty healthy male volunteers will be invited to participate in the second part of the
study. Participants will be randomly assigned to receive a dental anaesthetic solution
injection with a microneedle device (Group I) or with a standard thirty-gauge short
hypodermic needles (Group II) in the first week of the second part of the study.
Group I: The microneedle device will be applied randomly to the left or right buccal mucosa
of the first premolar tooth in the maxilla in order to inject slowly a standard local dental
anaesthetic solution.
Group II: A standard thirty-gauge short hypodermic needles will be used for insertion and
injection of the same standard local dental anaesthetic solution randomly to the left or
right buccal mucosa of the first premolar tooth in the maxilla.
Quantitative and qualitative measurements of the pain experienced and the depth of
anaesthesia achieved will be recorded for both groups and compared.
In order to eliminate any carryover effects, a washout period of one week between receiving a
second, opposite injection will be applied (i.e. Group I will receive an injection with a
standard thirty-gauge short hypodermic needles and Group II an injection with the microneedle
device). The buccal mucosa of the first premolar tooth in the untreated, opposite maxilla side
will receive an injection with the remaining injection method following the same procedure as
described for the first week.
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