CB2 activation and CBD promote bone repair, while chronic high-dose THC was associated with 1.8-3.6x higher spinal fusion failure.
Spine surgeons, orthopedic surgeons, patients facing surgery, cannabis users with fractures.
What the researchers found
CB2 agonists uniformly osteogenic. CBD accelerated early fusion. Chronic THC: 6-10% lower BMD, 1.8-3.6x higher pseudarthrosis risk. Short-course THC appeared neutral.
Why it matters
Directly actionable for millions of surgical patients: CBD helps, chronic THC harms bone healing.
The numbers in context
CBD accelerated fusion. THC: 6-10% lower BMD; 1.8-3.6x higher failure. Short-course THC neutral.
How the study worked
Systematic review of three databases on cannabinoids and bone outcomes through May 2025.
What this study cannot tell us
No prospective dosing trials. Most data preclinical.
How to read the evidence
Systematic review integrating preclinical and clinical evidence.
When this study was published
2025 systematic review of cannabinoids and bone healing.
The bigger picture
Chronic THC use is a modifiable surgical risk factor. The CB2 vs CB1 distinction is key.
Questions still open
- Should surgeons recommend CBD and restrict THC?
- What THC dose threshold is harmful?
Common questions
Does cannabis affect bone healing?
Should I stop THC before surgery?
Read the original research
The Cannabinoid Pharmacology of Bone Healing: Developments in Fusion Medicine.
Biomedicines, 13(8)
Citation
Urreola, Gabriel; Le, Michael; Harris, Alan; Castillo, Jose A; Saiz, Augustine M; Shahzad, Hania; Martin, Allan R; Kim, Kee D; Khan, Safdar; Price, Richard. (2025). The Cannabinoid Pharmacology of Bone Healing: Developments in Fusion Medicine.. Biomedicines, 13(8). https://doi.org/10.3390/biomedicines13081891
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