The Application of Manual Techniques in Masticatory Muscles Relaxation as Adjunctive Therapy in the Treatment of Temporomandibular Joint Disorders.
Featured on Physle Daily · Friday, 24 July 2026
This study looked at whether two different hands-on therapy techniques could help relax the jaw muscles in people with temporomandibular joint disorders, or TMD, a condition involving pain and dysfunction in the chewing system. Sixty patients were divided into two groups: one received post-isometric relaxation (a technique where you gently contract a muscle then relax it) and the other received myofascial release (sustained pressure on tight muscle tissue). Both groups had ten treatment sessions, and the researchers measured muscle electrical activity using equipment that picks up signals from working muscles, along with patients' pain levels on a simple pain scale.
Both techniques led to lower electrical activity in the jaw muscles and noticeably less pain. The two methods appeared roughly equally effective, suggesting that either approach might work as an add-on treatment when patients also need dental work or other interventions for their TMD.
If you live with jaw pain and dysfunction from temporomandibular joint disorders, you may wonder whether hands-on muscle treatments could help. This study followed sixty people who received one of two types of manual therapy aimed at relaxing the chewing muscles.
Both approaches, post-isometric relaxation and myofascial release, appeared to reduce muscle tension and lower pain levels when measured over ten sessions. The improvements were meaningful enough to suggest these techniques could play a useful role alongside other treatments like dental work or prosthetics. What remains less clear is how these methods compare to doing nothing, or how long the benefits last after treatment stops.
The study tells us that both approaches worked similarly well in this group, but your own response might differ based on your specific situation and which technique feels right for you.
This is a summary of research, not medical advice. Talk to your own healthcare provider about anything affecting your care.
This trial presents a straightforward comparison of two manual techniques applied to the masticatory muscles in a TMD population with a muscular component. Both post-isometric relaxation and myofascial release produced measurable decreases in sEMG activity and VAS pain ratings across ten sessions, with no statistically significant difference between groups.
The absence of a control or sham group means we cannot determine the magnitude of effect independent of natural recovery or placebo mechanisms, so the true clinical significance of these changes remains somewhat open to interpretation. From a practice perspective, the finding that both methods achieved similar outcomes suggests that either technique may be a reasonable adjunctive approach in patients preparing for prosthetic management or other interventions. The study does not address treatment frequency, duration beyond ten sessions, or durability of gains, so questions about optimal dosing and long-term outcomes remain.
This work provides a modest evidence base for the muscular relaxation component of TMD management but leaves room for larger or more controlled investigations to clarify the magnitude and persistence of benefit.
Both post-isometric relaxation and myofascial release produced significant reductions in muscle electrical activity and spontaneous pain in jaw muscles over ten treatment sessions.
No statistically significant difference was found between the two manual therapy approaches, suggesting both may be similarly effective as adjunctive treatments.
The study lacked a control group, so the extent of improvement attributable specifically to the manual techniques rather than other factors remains unclear.
Source
International journal of environmental research and public health
Urbański P, Trybulec B, Pihut M · 2021
doi: 10.3390/ijerph182412970