What topics does this cannabis study cover?

This study covers research on: CBD, Pain, Inflammation.

Where was this research published?

Published in Pain on September 8, 2026.

In mice, oral CBD reduced dental pain-like sensitivity via TRPV1

Q: What did this research study find?

In a mouse model of *apical periodontitis*, a single oral dose of *CBD* **significantly reduced mechanical hypersensitivity at 45 and 120 minutes** compared with vehicle.

Cannabidiol reverses mechanical hypersensitivity in a mouse model of apical periodontitis.

Pain • September 8, 2026 • Highly Relevant

🤖

AI Summary

This animal study asked whether oral cannabidiol (CBD) could reduce pain-like mechanical hypersensitivity caused by apical periodontitis, a tooth-root inflammation model, and whether the effect involved peripheral or central mechanisms. Male and female mice received pulp exposure to create apical periodontitis or sham surgery. Twenty-one days later, researchers measured sensitivity of the facial area with von Frey filaments and gave a single oral dose of CBD or vehicle.

Compared with vehicle, oral CBD significantly reduced mechanical hypersensitivity at 45 and 120 minutes in mice with apical periodontitis. The effect was greater in males than females at the dose tested. Additional injections suggested a central site of action, because spinal and brain-directed—but not local intraoral—CBD administration reduced hypersensitivity in male mice. Blocking the TRPV1 channel prevented the oral CBD effect, implicating this pain-signaling pathway.

This is an abstract-based summary of a mouse study, not a human clinical trial. The findings do not establish that CBD relieves dental pain in people, determine clinical importance, or identify a suitable dose or treatment regimen; the abstract also does not report sample sizes or effect sizes.

💡 Key Findings

In a mouse model of apical periodontitis, a single oral dose of CBD significantly reduced mechanical hypersensitivity at 45 and 120 minutes compared with vehicle.

Limited

35%

The analgesic effect of oral CBD was greater in male than female mice at the dose tested.

Limited

35%

Spinal and brain-directed CBD administration reduced hypersensitivity, while local intraoral administration did not, indicating a central site of action in this model.

Limited

35%

Blocking the TRPV1 channel prevented the analgesic effect of oral CBD in male mice, supporting involvement of this pathway.

Limited

35%

📄 Original Abstract

Cannabidiol (CBD) has both analgesic and anti-inflammatory properties. Because CBD is not psychotomimetic, it could be an excellent nonopioid alternative for various pain disorders. The aim was to assess the effectiveness of CBD as an analgesic for apical periodontitis-induced mechanical hypersensitivity (MH), its site of action (peripheral or central), and the potential involvement of transient receptor potential vanilloid 1 (TRPV1), using a mouse behavioral model of apical periodontitis (AP). Male and female mice underwent pulp exposure of the left maxillary first molar (AP group) or sham surgery (Sham group). Mechanical hypersensitivity was assessed 21 days after surgery using von Frey filaments on the left vibrissal pad. Apical periodontitis mice that received a single dose of oral CBD (AP [CBD]) experienced a significant reduction in MH at 45 minutes and 120 minutes compared with AP mice that received vehicle (AP [Veh]). The analgesic effect in males was significantly greater than in females at this CBD dose. Intrathecal and intracisternal (IC), but not ipsilateral intraoral, CBD injections reduced MH in the male AP (CBD) group, indicating a central site of action of CBD in this model of odontogenic pain. Furthermore, intraperitoneal and IC injection of AMG 517 (TRPV1 antagonist) before an oral CBD dose blocked the CBD analgesic effect in male mice, suggesting TRPV1's involvement. Overall, this study shows, for the first time, that oral CBD can be an effective analgesic for apical periodontitis-induced MH. This analgesic effect was mediated through a central site of action and involved the TRPV1 channel.

Paper Type

📄 Research

Publication

Journal: Pain
Published: September 8, 2026
PMID: 42708340
DOI: 10.1097/j.pain.0000000000004121

Authors (10)

Vanessa Chrepa Department of Endodontics, School of Dentistry, University of Texas at San Antonio, San Antonio, TX, United States.
Josue Murillo Department of Endodontics, School of Dentistry, University of Texas at San Antonio, San Antonio, TX, United States.
Stephany Villasenor Department of Endodontics, School of Dentistry, University of Texas at San Antonio, San Antonio, TX, United States.
Meilinn Tram Department of Endodontics, School of Dentistry, University of Texas at San Antonio, San Antonio, TX, United States.
Shilpa Ganatra Department of Endodontics, School of Dentistry, University of Texas at San Antonio, San Antonio, TX, United States.
+5 more authors