The majority of patients achieve substantial pain relief and improved function after total knee arthroplasty (TKA), but a proportion continues to experience life-disturbing persistent postsurgical pain (PPSP) in the months and years after surgery. This study aimed to assess the efficacy of transcutaneous electrical nerve stimulation (TENS), exercise, and pulsed radiofrequency (PRF) treatment on pain severity, neuropathic pain, knee flexion range of motion (ROM), functional status, and patient satisfaction in patients with PPSP after TKA. This is a retrospective study of prospectively collected data. Patients who were identified retrospectively from hospital charts were divided into two groups: group 1 ( = 17) received TENS and exercise treatment and group 2 ( = 22) received TENS, exercise, and PRF application to the dorsal root ganglion (DRG). The following procedure-related parameters were collected from the special registry form: visual analog scale (VAS), Douleur Neuropathique 4 (DN4) questionnaire, knee flexion ROM, the Western Ontario and McMaster Universities Osteoarthritis Index (WOMAC), and patient satisfaction scale scores. The mean follow-up was 253.8 ± 109 days. When the two groups were compared, a significant difference of at least 50% improvement in the VAS (activity) and a significant reduction in the DN4 scores following the last control examination were found in group 2. There was a significant reduction in total WOMAC scores in group 1 compared with group 2 for the four study periods. Higher scores for the patient satisfaction scale were found in group 1 compared with group 2 following the last control examination. Adding PRF to TENS and exercise therapy is useful in reducing the degree of pain and the neuropathic component of PPSP in patients with PPSP.

The aim of the study is to research the effect of kinesiophobia and pain catastrophizing behavior on disability related to low back pain among patients with chronic non-specific low back pain. Material and Methods: In this prospective and cross-sectional study, in which the data of 54 patients in total were recorded with 3 stages of patient recruitment; the data of kinesiophobia (with Tampa Kinesiophobia Scale ), catastrophe (with Pain Catastrophizing Scale) and low back pain-related disability level (with Oswestry Disability Index) with sociodemographic and anthropometric data were analyzed. By means of statistical analysis; continuous variables were expressed with mean value±standard deviation and median value (minimum-maximum) and categorical variables were expressed in terms of numbers and percentages. The Pearson and Spearman correlation coefficient was used to evaluate the correlation of the variables. The correlation coefficient of 0.00-0.30 was considered as negligible, 0.30-0.50 as low, 0.50-0.70 as medium, 0.70-0.90 as high, and 0.90-1.00 as very high. Results: A moderate positive correlation was identified between kinesiophobia and catastrophizing with disability level related to low back pain. There was a low-degree negative correlation between disability level related to low back pain with education and income level. Conclusions: Psychosocial pathologies like kinesiophobia and pain catastrophizing behavior may affect disability related to low back pain in a negative sense. In addition to the pathoanatomic/biomedical approach, treatment should include a psychosocial-based assessment and if psychosocial pathology is identified, treatments like pain education and cognitive behavioral therapy should be added to present treatments.