Knee orthoses for treating patellofemoral pain syndrome.

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Abstract

[Indexed for MEDLINE] Conflict of interest statement: Toby O Smith: none known
 Benjamin T Drew: currently holds a NIHR/HEE Clinical Doctoral Fellowship grant
 Toby H Meek: none known
 Allan B Clark: none known 20. J Orthop Surg (Hong Kong). 2020 Jan-Apr;28(1):2309499019900819. doi: 10.1177/2309499019900819. Lower extremity alignment due to patellofemoral syndrome and dynamic postural balance. Erdoganoglu Y(1), Pepe M(2), Kaya D(3), Tagrikulu B(4), Aksahin E(4), Aktekin CN(5). Author information: (1)Department of Physiotherapy and Rehabilitation, Faculty of Health Sciences, Uskudar University, İstanbul, Turkey. (2)Department of Orthopedics and Traumatology, Alanya Training and Research Hospital, Antalya, Turkey. (3)Department of Physiotherapy and Rehabilitation, Faculty of Healty Sciences, Uludag University, Bursa, Turkey. (4)Orthopaedics and Traumatology, Medical Park Hospital, Ankara, Turkey. (5)Department of Orthopaedics and Traumatology, Ankara Yildirim Beyazit University, Ankara, Turkey. STUDY DESIGN: This study is a prospective study. AIM: Lower extremity malalignment is an important etiologic factor in patellofemoral pain syndrome (PFPS). We hypothesized that lower limb malalignment may affect dynamic balance and physical function. This prospective study was conducted to investigate the relationship between the lower limb alignment and the dynamic balance and physical function in patients with PFPS. METHODS: The study included 62 individuals with unilateral PFPS. Pain severity was assessed by the numerical pain scale and the pain duration was recorded. Lower extremity bone alignment was evaluated by the lateral distal femoral angle (LDFA) and the medial proximal tibia angle. Dynamic postural balance was assessed by the star excursion balance test. The functional status of the patients was evaluated by the 30-second chair stand test. RESULTS: The mean duration of the pain was 24.2 ± 31.5 months and the mean pain severity was 8.1 ± 1.4. Although there was a significant difference found between the affected and unaffected LDFA values of lower extremities (p < 0.05), there was no difference found with regard to the dynamic balance values of the lower extremities (p > 0.05). However, significant changes of posterolateral balance were identified at a painful side without causing a postural dynamic imbalance (p < 0.05). CONCLUSION: In our study, we found a valgus deformity as a deterioration in the lower limb alignment of patients with PFPS which may cause a deterioration of posterolateral balance only. However, no change in postural dynamic balance was observed in the comparison of affected side and unaffected side. Dynamic postural balance has been influenced by many kinematic changes related to lower extremities including pelvis, hip, and ankle. Thus, reciprocal mechanisms in the anatomical structures may compensate the postural balance dynamically. DOI: 10.1177/2309499019900819