Abstract
BackgroundTo assess whether the techniques of percutaneous needle electrolysis (PNE) and deep dry needling (DDN) used on trigger points (TrP) of lateral pterygoid muscle (LPM) can significantly reduce pain and improve function in patients with myofascial pain syndrome (MPS) compared to a control group treated with a sham needling procedure (SNP).Material and MethodsSixty patients diagnosed with MPS in the LPM were selected and randomly assigned to one of three groups. The PNE group received electrolysis to the LPM via transcutaneous puncture. The DDN group received a deep puncture to the TrP without the introduction of any substance. In the SNP group, pressure was applied to the skin without penetration. Procedures were performed once per week for 3 consecutive weeks. Clinical evaluation was performed before treatment, and on days 28, 42 and 70 after treatment.ResultsStatistically significant differences (p<0.01) were measured for the PNE and DDN groups with respect to pain reduction at rest, during chewing, and for maximum interincisal opening (MIO). Values for the PNE group showed significantly earlier improvement. Differences for PNE and DDN groups with respect to SNP group were significant (p<0.05) up to day 70. Evaluation of efficacy as reported by the patient and observer was better for PNE and DDN groups. No adverse events were observed for either of the techniques.ConclusionsPNE and DDN of the LPM showed greater pain reduction efficacy and improved MIO compared to SNP. Improvement was noted earlier in the PNE group than in the DDN group. Key words:Myofascial pain syndrome, myofascial trigger points, percutaneous needle electrolysis, deep dry needling, lateral pterygoid muscle.
Highlights
Myofascial pain syndrome (MPS) is a complex disorder of the musculoskeletal system, with multifactorial involvement, which has several clinical presentations in multiple areas of the body
percutaneous needle electrolysis (PNE) and dry needling (DDN) of the lateral pterygoid muscle (LPM) showed greater pain reduction efficacy and improved maximum interincisal opening (MIO) compared to sham needling procedure (SNP)
myofascial pain syndrome (MPS) should be suspected in patients with pain and dysfunction of the masticatory muscles, together with the existence of trigger points (TrP) on palpation (1)
Summary
Myofascial pain syndrome (MPS) is a complex disorder of the musculoskeletal system, with multifactorial involvement, which has several clinical presentations in multiple areas of the body One of these is the orofacial region, affecting the masticatory muscles and the temporomandibular joint (TMJ). Management can include the control of parafunctional habits, use of a mouth guard, and analgesic-anti-inflammatory therapy This can be in conjunction with inactivation of TrPs by non-invasive methods, such as massages, ultrasound, muscle stretching with application of cold spray, and magnetic or electrical stimulation. To assess whether the techniques of percutaneous needle electrolysis (PNE) and deep dry needling (DDN) used on trigger points (TrP) of lateral pterygoid muscle (LPM) can significantly reduce pain and improve function in patients with myofascial pain syndrome (MPS) compared to a control group treated with a sham needling procedure (SNP). No adverse events were observed for either of the techniques
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