Effect of hip strategy-based motion control training on walking function restoration after ankle joint injury.

OBJECTIVES: The study aimed to explore the effect of hip strategybased motion control training on the recovery of walking function after ankle injury and the optimization of the rehabilitation program. PATIENTS AND METHODS: In the study, 62 patients with ankle injuries were randomly divided into the observation group (n=30; 24 males, 6 females; mean age: 41.9±8.5 years; range, 28 to 56 years) and the control group (n=32; 26 males, 6 females; mean age: 42.0±9.3 years; range, 27 to 55 years) between September 2021 and September 2022. Both groups were treated using routine rehabilitation training, including conventional drug and rehabilitation treatment. The observation group additionally received hip strategy-based motion control training, which included hip muscle strength training, hip joint stability control training, balance testing and training system training, and three-dimensional gait analysis system training for six weeks. All patients were evaluated before and after the treatment using the balance function parameters (motion length and motion ellipse area), Berg Balance Scale, the timed up-and-go test, and three-dimensional gait analysis system (step length and step frequency). RESULTS: There was no significant difference in the evaluation indexes between the two groups before treatment (p>0.05). After treatment, the evaluation indexes of the two groups were significantly better than those before treatment (p<0.05), and all the indexes in the observation group were significantly better than those in the control group (p<0.05). CONCLUSION: Hip strategy-based motion control training could significantly improve the recovery of walking function in patients with ankle injuries.

Effects of three at-home bleaching agents on enamel structure and structure-related mechanical properties / 中华口腔医学杂志

<p><b>OBJECTIVE</b>To investigate the effects of three differently concentrated at-home bleaching agents on the structure and the structure-related mechanical properties of human enamel.</p><p><b>METHODS</b>Sixty enamel specimens were randomly divided into four groups and treated with 10% carbamide peroxide (CP), 15% CP, 20% CP and distilled water, respectively. The bleaching process was 8 h/day for 14 consecutive days. Baseline and final atomic force microscopy (AFM) surface detection, Raman spectroscopy, attenuated total reflectance-infrared spectroscopy (ATR-IR), microhardness and fracture toughness (FT) measurements were carried out before and after bleaching experiments.</p><p><b>RESULTS</b>CP didn't change the morphology of enamel. Meanwhile, the three bleached groups and the control group had no significant difference in root mean square detection (P = 0.774), ν(2)CO(3)(2-) : ν(1)ν(3)PO(4)(3-) (P = 0.263) and microhardness (P = 0.829). The percentage of relative Raman intensity in the three bleached groups and the control group were (105.74 ± 11.34)%, (104.46 ± 8.83)%, (99.52 ± 9.32)% and (97.62 ± 7.46)%, respectively. There was no significant difference among them (P = 0.062). However, the percentage of laser-induced fluorescence in the three bleached groups and the control group were (20.86 ± 7.23)%, (22.14 ± 7.34)%, (21.10 ± 7.59)% and (100.78 ± 3.70)%, respectively. There was significant difference between either of the bleached groups and the control group (P < 0.001). Moreover, FT declined significantly in the three groups (P = 0.024, P = 0.005, P = 0.013) when compared with the control group.</p><p><b>CONCLUSIONS</b>Under in vitro condition, three differently concentrated at-home bleaching agents wouldn't induce the demineralization and the decline of microhardness on enamel. However, the decrease of FT on enamel seemed to be inevitable after bleaching.</p>