Cope or Not✗ COPE
training
Silicone Jaw Exercisers
Marketing-first products; anything they do, chewing does with lower TMJ risk.
D
Evidence grade D
No credible supporting evidence
Mechanism
Same masseter-hypertrophy pathway as hard chewing, but with higher, less controlled resistance that loads the temporomandibular joint aggressively.
Citations
- Temporomandibular disorders and parafunctional habits: a reviewJournal of Oral & Facial Pain and Headache · 2019
The full read
The before/afters are lighting, leanness, and time. High-resistance biting devices push force through the TMJ at angles it doesn't tolerate well; clinicians report disc irritation and myofascial pain from overuse. If masseter growth suits your face, mastic gum achieves it more safely and cheaply. The devices add risk, not results.
Aesthetic information, not medical advice. Verdicts reflect the cited evidence at time of writing.