[The Influence of Foot Orthoses on Patellofemoral Pain Syndrome: A Systematic Analysis of the Literature].

BACKGROUND

The patellofemoral pain syndrome (PFPS) is one of the most commonly encountered disorders involving the knee. The symptoms often lead to a reduction of physical activities resulting in sport- and job-related disabilities and the potential occurrence of severe disorders. Different theories for the development of the syndrome exist which result in different therapy modalities. A change in foot posture and its effect on lower limb kinematics seem to be one potential risk factor for the development of the syndrome. This leads to the assumption that foot orthoses might be a potential therapy device.

OBJECTIVES

The aims of this study were to outline the state of evidence for the treatment of PFPS with foot orthoses and to identify the effect of foot orthoses on PFPS.

STUDY DESIGN

A systematic review of clinical (CT) and randomized controlled trials (RCT) was undertaken.

METHODS

A systematic search for studies (CT, RCT) was conducted using the databases of Medline (PubMed), Cochrane library, and PEDro. The relevance for further analysis of studies was reviewed on the basis of title and abstract. An additional search was undertaken using the reference lists of the included studies and additional literature as well as the PubMed function "related articles".

RESULTS

11 studies were included in this analysis. The effect of different types of foot orthoses on pain, function and kinematics of the lower limb and muscle activation of selected lower limb muscles was analysed. Significant effects on pain and function were determined. A slight effect on kinematics of the lower limb and muscle activation of selected lower limb muscles was identified.

CONCLUSION

Foot orthoses seem to be an effective treatment device in the therapy for PFPS. An immediate and long-term reduction in pain and an improvement of function occurred following the intervention. There was just a slight change in lower limb kinematics and muscle activation of selected lower limb muscles. The relationship between biomechanical effects of orthoses and pain still seems to be unclear.