The Study
Repeated Muscle Injury as a Presumptive Trigger for Chronic Masticatory Muscle Pain
This study is like a scientist telling a story based on other experiments they’ve read about. It doesn’t do a new experiment but puts together clues from animal studies to suggest an idea: that jaw muscles might get worse with repeated injury and that could lead to long-term pain. We can’t say for sure it’s true, but it’s a reasonable guess worth testing.
Analysis score
Maximum 5 for a narrative review.
Where the score came from
When jaw muscles get injured more than once, they don’t get stronger like leg muscles do. Instead, they get more damaged and heal poorly, which might lead to long-lasting pain.
Where does this study sit?
Reviews of RCTs (Meta-analyses)
Max 100Randomized Trials
Max 90Reviews of Cohort Studies
Max 85Cohort Studies
Max 72Reviews of Case-Control Studies
Max 63Case-Control Studies
Max 58Cross-Sectional & Case Series
Max 50Expert Opinion
Max 51 / 100
Quality score
Based on clinical experience or non-systematic literature reviews. The lowest level of evidence as they are most susceptible to bias and personal perspective.
Key takeaways
Summary
Based on the study abstract and findings.
- 1This means repeated clenching or grinding could make jaw pain worse over time, not better, because the muscles can’t adapt like others.
- 2After a second injury, jaw muscles had 79% less strength and more damage signs than after the first.
- 3Leg muscles usually get protected after the first injury, but jaw muscles do not.
Score breakdown, methodology, conflicts of interest, evidence analysis & raw study data
Publication
Journal
Pain Research and Treatment
Year
2011
Authors
D. Dessem, R. Lovering
Related Content
Claims (6)
Your muscles get used to tough workouts over time, so they hurt less and recover faster the more you do them.
If you keep injuring your jaw muscles, it might make the pain-sensing nerves more sensitive over time, which could lead to long-lasting muscle pain.
When you hurt a chewing muscle, your body might produce more of a protein called NGF, which could make the nerves in that muscle extra sensitive over time and lead to long-lasting pain.
Your jaw muscles don't heal as well after injury compared to leg muscles — they get scarred and don't fix themselves properly, at least in animal studies.
When jaw muscles get injured over and over, they don’t get tougher like arm or leg muscles do — instead, they get more damaged and weaker each time.
If you regularly clench or grind your teeth, it might keep injuring the jaw muscles, and if those muscles can't heal properly, it could lead to long-term jaw pain.
Not medical advice. For informational purposes only. Always consult a qualified healthcare professional before making health decisions.