Auricular electrical stimulation and dental pain threshold

Area of Science:

• Pain Management
• Neuroscience
• Acupuncture and Related Therapies

Background:

• Dental pain is a common issue.
• Current pain management strategies have limitations.
• Non-pharmacological approaches like auricular electrical stimulation (AES) are being explored.

Purpose of the Study:

• To investigate the effectiveness of auricular electrical stimulation (AES) in producing dental analgesia.
• To determine if the analgesic effect of AES is reversible by naloxone.
• To explore the potential role of the endogenous opioid system in AES-induced analgesia.

Main Methods:

• A double-blind, placebo-controlled study was conducted with 40 subjects.
• Subjects were randomly assigned to four groups: AES with saline, AES with naloxone, placebo AES with saline, or placebo AES with naloxone.
• Dental pain threshold was measured using a dental pulp tester.
• Naloxone or saline was administered intravenously.

Main Results:

• Auricular electrical stimulation (AES) significantly elevated the dental pain threshold by 18% compared to placebo.
• The analgesic effect of AES was partially blocked by naloxone, with a mean pain threshold increase of 23% in the saline group versus 12% in the naloxone group.
• Placebo stimulation groups showed no significant change in pain threshold.

Conclusions:

• Auricular electrical stimulation (AES) provides a small but significant elevation in dental pain threshold.
• The partial reversal of AES analgesia by naloxone suggests that the endogenous opioid system plays a role in this effect.
• AES may be a viable non-pharmacological adjunct for dental pain management.