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End-range Maitland mobilization decreasing pain sensitivity in knee osteoarthritis: randomized, controlled clinical
Miklós Pozsgai1,2, Iván A Péter3, Nelli Farkas4
1Department of Balneology, Harkány Termal Rehabilitation Center, Harkány, Hungary - miklos.pozsgay@gmail.com.
Background:
Pressure pain threshold (PPT) is a widely applied method for measuring the magnitude of increased peripheral and central pain sensitivity causing hyperalgesia in knee osteoarthritis (OA). Although manual therapy techniques effects positively PPT, the effect of end-range Maitland mobilization has not been evaluated in knee OA.
Aim:
The aim of this study was to investigate the effect of end-range Maitland mobilization compared to sham manual therapy technique on PPT and function-related measures.
Design:
The design of the study was of a randomized, controlled clinical trial.
Setting:
Outpatient setting.
Population:
Forty women with moderate-to-severe knee OA.
Methods:
Twenty patients (N.=20) were randomly assigned to Maitland group (MG) and twenty patients (N.=20) to control group (CG). Patients in MG received single end-range Maitland mobilization while patients in CG received sham manual therapy technique. Assessment was performed at baseline, 30 minutes and after 1-week period. Outcome measures were PPT locally at knee and distant at ipsilateral extensor carpi radialis longus muscle, general pain during the previous week using the Visual Analogue Scale (VAS), Timed Up and Go Test (TUG) time associated with pain measured with Numerating Pain Rating Scale (NPRS) and strength of passive resistance of knee at onset of pain.
Results:
Despite all outcome measures improved significantly postintervention, no changes were detected after 1-week period compared to postintervention in MG. No change of outcome measures was found also postintervention and after 1-week period compared to postintervention in CG. All postintervention results showed significant improvement in between-group comparison in favor of MG. However, after 1-week period, only strength of passive resistance revealed significant difference in between-group comparison in favor of MG (P<0.001).
Conclusions:
Although end-range Maitland mobilization has an immediate effect on decreasing peripheral and central pain sensitivity and improving function-related measures in knee OA, these changes may not cause clinically relevant effect based on data measured after 1-week period.
Clinical Rehabilitation Impact:
Investigating the time-course of end-range Maitland mobilization for determining the optimal treatment frequency during rehabilitation is suggested in knee OA.
