Correction to: "Comparative repair capacity of knee osteochondral defects using regenerated silk fiber scaffolds and fibrin glue with/without autologous chondrocyes during 36 weeks in rabbit model (Cell and Tissue Research, (2016), 364, 3, (559-572), 10.1007/s00441-015-2355-9)

In this paper, figure 1 and its associated text were erroneously identical to that of another article from our group (Mobini et al., 2016, Journal of Biomaterial Application, SAGE publications). Unfortunately, copyright permission to re-use figure 1 and its related data were not requested. The authors would like to apologize for any confusion caused in this regard. © 2019, Springer-Verlag GmbH Germany, part of Springer Nature

Ultra-conformal drawn-on-skin electronics for multifunctional motion artifact-free sensing and point-of-care treatment

An accurate extraction of physiological and physical signals from human skin is crucial for health monitoring, disease prevention, and treatment. Recent advances in wearable bioelectronics directly embedded to the epidermal surface are a promising solution for future epidermal sensing. However, the existing wearable bioelectronics are susceptible to motion artifacts as they lack proper adhesion and conformal interfacing with the skin during motion. Here, we present ultra-conformal, customizable, and deformable drawn-on-skin electronics, which is robust to motion due to strong adhesion and ultra-conformality of the electronic inks drawn directly on skin. Electronic inks, including conductors, semiconductors, and dielectrics, are drawn on-demand in a freeform manner to develop devices, such as transistors, strain sensors, temperature sensors, heaters, skin hydration sensors, and electrophysiological sensors. Electrophysiological signal monitoring during motion shows drawn-on-skin electronics' immunity to motion artifacts. Additionally, electrical stimulation based on drawn-on-skin electronics demonstrates accelerated healing of skin wounds. Designing efficient wearable bioelectronics for health monitoring, disease prevention, and treatment, remains a challenge. Here, the authors demonstrate an ultra-conformal, customizable and deformable drawn-on-skin electronics which is robust to motion artifacts and resistant to physical damage

An Evaluation of New Indices of Postural Sway in Patients with Knee Osteoarthritis

BACKGROUND AND OBJECTIVE: Reduced joint proprioception plays an important role in the initiation and progression of the knee osteoarthritis. The present study aims to evaluate postural sway in three different positions and analyze its trends using relative indices. METHODS: This cross-sectional study was conducted among 34 patients with knee osteoarthritis and 12 healthy people using selective sampling and convenience sampling. In order to evaluate the static equilibrium indices, patients were asked to sit on the force plate in three positions; Comfort Double Leg Standing (CDLS), Romberg Standing (RS) and Near Tandem Standing (NTS). The relative values of   and  were used to determine the changes in postural sway in RS and NTS positions relative to CDLS. FINDINGS: In CDLS position, the range and the standard deviation of lateral position in patients (0.019 ± 0.010 and 0.003±0.001, respectively) was lower than healthy people (0.051 ± 0.039 and 0.012 ± 0.010, respectively). In this position, the displacement range in the anterior-posterior direction in patients (0.110 ± 0.029) was also lower than healthy people (0.130 ± 0.027). In RS position, standard deviation and the velocity of center of pressure displacement in the patients group (0.016 ± 0.006 and 0.012 ± 0.004, respectively) was significantly higher than healthy people (0.012 ± 0.003 and 0.009 ± 0.002, respectively). On the contrary, the ratio of  and values was higher in patients group. CONCLUSION: Results of the study demonstrated that patients with more difficult positions (RS, NTS) have more sways than those with CDLS, especially in the lateral direction. Therefore, balancing and strengthening exercises are especially important in the lateral direction and in challenging situations

Effects of Electrical Stimulation on the Management of Ischemic Diabetic Foot Ulcers

BACKGROUND AND OBJECTIVE: Diabetic foot ulcer is a major complication caused by diabetes. Electrical stimulation is considered as an efficient modality of diabetic wound healing. This study aimed to investigate the effects of direct-current stimulation of cathodal on skin temperature and acceleration of ischemic diabetic foot ulcer closing. METHODS: This randomized, single-blinded, clinical trial was conducted from November 2013 to September 2014 on 20 patients with type II diabetes suffering from ischemic diabetic foot ulcers. Subjects were randomly divided into two groups of electrical stimulation and placebo. The electrical stimulation group received direct-current cathodal stimulation to the wound for one hour a day, repeating three days a week (4 weeks, 12 sessions), and the placebo group underwent the same procedure with zero-intensity electrical stimulation. Skin surface temperature was measured in the plantar and dorsal areas of the diabetic foot before and after the intervention at sessions one, six and twelve. In addition, the surface of ulcer area was measured at the same intervals (IRCT: 2014110819854 N1). FINDINGS: Comparison of the study groups indicated the mean of skin temperature changes to be significantly higher in the stimulation group compared to the placebo group at sessions one (p=0.01, 0.41±0.2 and 0.75±0.26), six (p=0.01, 0.25±0.27 and 0.6±0.21) and twelve (P=0.007, 0.25±0.27 and 0.66±0.23), respectively. In addition, reduction of the wounded area was considerably higher in the electrical stimulation group (52.68%) compared to the placebo group (38.39%) at session 12 (p=0.02). CONCLUSION: According to the results of this study, direct-current cathodal stimulation could improve skin temperature and accelerate wound closing in ischemic diabetic ulcers

The effect of action observation on weight distribution and dynamic balance index improvement in hemiparetic patients based on mirror neuron theory

Background and Objective: Cerebrovascular accident (CVA) is a severe debilitating neurological condition in adults. This study sought to assess the effect of observation and mimicking functional activities on weight distribution and dynamic balance index improvement in lower limbs of hemiparetic patients based on mirror neuron theory. Materials and Methods: This clinical trial was performed on 36 males and females aged 45-60 years who suffered ischemic CVA for the first time. Subjects were randomly divided into 3 groups as follows: viewers of functional film, viewers of non-functional (symbol) film and the control group (not watching any film). The physiotherapy treatments in all groups were similar. Results: Weight percentage distribution was not significant. The values prior to and after dynamic balance index were statistically significant in all 3 groups. Significant differences were found between group 1 and the other 2 groups in terms of balance index percentage change (level 6). Conclusion: Observation and imitation of action along with rehabilitation exercises and functional activities had a positive effect on the improvement of balance Index in post-stroke patients. © 2015, Zanjan University of Medical Sciences and Health Services. All Rights Reserved