Objective:To observe the repairing effect of ozone water injection in the articular cavity for the treatment of knee osteoarthritis (KOA) on articular cartilage and to explore its repair mechanism.Methods:48 rats were randomly divided into fourgroups, the normal, model, normal saline and ozone water group, each group had 12 rats. The rats were injectied into the joint cavity with papain to establish a KOA model other than the normal group. After confirming the success of the model, the ozone water group and normal saline group was treated with ozone water and normal saline injection into the joint cavity once a week for a total of 3 treatments, the normal group and the model group are all raised routinely. Before and after the treatment, the ratknee joint behavioral score MG score was conducted; after the treatment articular cartilage surface gross score, hematoxylin and eosin (HE) staining and modified Mankin score of articular cartilage pathological changes was measured, and Western blot and Rt-PCR to measure the level of protein and mRNA expression of NF-κB p65, IKKβ and IκBα in articular cartilage tissues.Results:Compared with before the treatment, the rat knee joint behavioral score of the ozone water group was significantly lower (all P<0.05); after the treatment, the gross articular cartilage surface score and the modified Mankin score of the ozone water group were significantly reduced compared with the model and normal saline group (all P<0.05); Compared with the model and normal saline group, the protein and mRNA expression levels of NF-κB p65 and IKKβ in the ozone water group are significantly lower (all P<0.05), and the levels of IκBα are significantly higher (all P<0.05). Conclusion:Ozone water injection in the articular cavity can effectively repair damaged articular cartilage. The repair mechanism may be achieved by inhibiting the activation of NF-κB signaling pathway.

Objective:To analyze the abnormal vestibular function of Wernicke encephalopathy (WE) and to explore its diagnostic value.Methods:WE patients who visited the Vertigo Center of the Second Affiliated Hospital of Zhengzhou University from January 2018 to January 2021 were retrospectively collected. All patients were evaluated by clinical neurology. Before treatment, all patients completed video head impulse test (vHIT) and video nystagmusgraphy (VNG) in addition to cranial magnetic resonance and serum thiamine level examination.Results:All 12 patients had a history of eating defects, including 8 cases of alcoholism. All 12 patients had walking instability, 7 cases had dizziness and 8 cases had oscillopsia. Six cases had ophthalmoplegia. All 12 cases showed positive gaze nystagmus. The pathological saccades of bilateral horizontal semicircular canals were found in 12 patients by vHIT before treatment, but there was only 1 patient showing abnormality in vertical semicircular canals, the difference being statistically significant ( P<0.05). All patients could detect bilateral, horizontal, gaze-evoked nystagmus, including 3 cases with vertical nystagmus, 1 case with abnormal saccade test, 3 cases with abnormal smooth tracking test and 1 case with abnormal optokinetic test. There were abnormalities in the caloric test, including 6 cases of bilateral dysfunction and 2 cases of unilateral dysfunction. Conclusions:WE patients may have abnormal vHIT and bilateral, horizontal, gaze-evoked nystagmus, which is similar to the special abnormal signs of simultaneous damage of both peripheral and central vestibular dysfunction.Vestibular function test is valuable for diagnosis of WE, and it is suitable for patients with a history of nutritional disorders who have dizziness or walking instability and suspected WE.

OBJECTIVE: To analyze characteristics of mandibular movement in patients with unilateral mastication.
 METHODS: Undergraduate students in oral medicine from Grade 2011 and 2012 in Wannan Medical College were enrolled for this study by cluster sampling method, which include 30 people with unilateral mastication and 30 people with bilateral mastication. The surface electromyogram (sEMG) of masseter muscle and anterovent of digastric muscle were recorded and the trajectory of mandibular incisor point was recorded simultaneously in the maximum opening and closing movement. The results were analyzed by SPSS 19.0 software.
 RESULTS: Average electrical peak of left anterior digastric muscle and right anterior digastric muscle in the unilateral chewing group was lower than that in the bilateral chewing group (P<0.05). The jaw tangent point trajectory was separate in the unilateral chewing group. There were significant differences at the opening type between the 2 groups. The vertical displacement and the sagittal displacement in the unilateral chewing group were significantly lower than those in the bilateral chewing group (P<0.01). There was significant positive correlation between the average peak potential of masseter muscle and displacement on the right side.
 CONCLUSION Average electrical peak of left masseter muscle, left anterior digastric muscle, and right anterior digastric muscle decreases in the unilateral chewing group. Jaw tracking in most people deflects to the working side. Opening and closing jaw tracking is separate in 50% unilateral chewing individuals with the decreased opening degree. Unilateral chewing leads to changes in muscle performance accompanied by trajectory anomalies.
Electromyography ; Humans ; Mandible ; Mastication ; Masticatory Muscles ; Movement

Corneal collagen cross-linking (CXL) has been proved to be a very safe and effective technique to halt the progression of many cornea diseases, such as ectasia disease, infectious keratitis and ametropia.CXL techniques include conventional CXL, accelerated CXL, transepithelial CXL and photochemical CXL.CXL can prevent the progression of dilated keratopathy, postpone or avoid corneal transplant surgery, and has an auxiliary function in the treatment of bullous keratopathy, infectious keratitis except herpes virus infection, and ametropia.CXL is not effective for patients with ocular herpes virus infection and patients with thin cornea and may even worsen the development of the disease.This review summarized the advantages and disadvantages of common CXL techniques, indications, contraindications, and complications, which may help enhancing the clinical application of CXL and reducing its complications.

Objective:To evaluate the effect of mushroom-like pattern femtosecond laser enabled penetrating keratoplasty with different laser energies on the ring incision and corneal endothelial cells, and compare with conventional penetrating keratoplasty.Methods:According to the point/line separation and blasting energy, 48 porcine corneas were randomly divided into 6 groups by using a random number table.In group A, B, C, D and E, the point/line separation was 4/4, 4/4, 8/8, 8/8 and 4/2 μm, and the blasting energy was 1.5, 2.0, 1.5, 2.0 and 2.0 μJ; In group F, a negative pressure ring drill was used to make penetrating incisions.There were 8 porcine corneas in each group.Femtosecond laser of 200 kHz was used to make corresponding mushroom-shaped penetrating incisions on the porcine corneas, and compared with porcine corneas incisions with a ring drill.The optical and scanning electron microscope images were used to evaluate the glossiness of ring incisions.Four human corneas used femtosecond laser for mushroom-like penetrating incisions with point/line separation 8/8 μm, and blasting energy 2.0 μJ as the experimental group; three human corneas received a negative pressure ring drill for penetrating incisions as the control group.The loss rate of corneal endothelial cells was observed and compared between experimental group and control group.The donor guardians agreed to the acquisition and use of the donors' cornea and signed informed consents.This study protocol was approved by the Ethics Committee of Nanjing First Hospital.Results:Femtosecond laser mushroom penetrating ring incision completion rate was 100%.The corneal ring incision in each group was stepped, and sections of ring incisions in group A and group E were glossiest by the light microscope.Sections of ring incisions in group E were glossiest by the laser scanning electron microscope.The overall glossiness scores of the corneal ring incisions among various groups were statistically significantly different by the light microscopy ( F=22.75, P<0.01). Among them, the glossiness scores in the group A were higher than those in the group B, and the glossiness scores in the group C were higher than those in the group D, with statistically significant differences (both P<0.05). The overall glossiness scores of corneal ring incisions among various groups were statistically significantly different by laser scanning electron microscopey ( F=122.33, P<0.01). Among them, the glossiness scores in the group A were higher than those in the group B, and the the glossiness scores in the group C were higher than those in the group D, with statistically significant differences (both P<0.05). The corneal endothelial cells showed regular shape and tight arrangement in the experimental group, and irregular shape and loose connections were seen in the control group.The average corneal endothelial cell loss rate in the experimental group was (2.2±1.3)%, lower than (6.7±2.1)% of the control group, with a significant difference between them ( t=3.569, P<0.05). Conclusions:Femtosecond laser can produce perfect mushroom configuration, and the ring incision glossiness is better in comparison with trephine cutting.Femtosecond laser ring cut can lessen corneal endothelial loss.