Relationship between proprioception and chronic ankle instability / 中华物理医学与康复杂志

Objective To evaluate how proprioception affect ankle stability through comparing angle position awareness and peroneus reaction time between chronic ankle lateral instability patients and healthy controls.Methods A total of 51 participants were recruited into an experimental group of 21 patients with chronic ankle lateral instability (17 males,aged 31.6±2.6) and a control group of 30 healthy counterparts (24 males,aged 34.2±2.3).All the participants were asked to reoccur passive ankle position under the angular velocity at 2 degree per second when they were resting with non-weight bearing in their recruited ankles.The muscle reaction time (MRT)of peroneus longus(PL) and peroneus brevis (PB) in all the recruited ankles was measured during sudden ankle inversion both with and without ankle protective brace wearing.Results The difference between angle recurrence and the target angle (ankle inversion 20° and 30°) was significantly higher (P＜0.05) in the experimental group compared to the control group.The average MRTs of PL and PB were also significantly longer (P＜0.05) in the experimental group than the control group,whether wearing ankle protective braces or not.However,within both groups,no significant differences of PL and PB's MRT were identified between brace wearing and no brace (P＞0.05).Conclusions In patients with chronic lateral ankle instability,the position awareness decreases and the reaction time of peroneus is prolonged.Ankle braces can provide mechanical protection to the injured joints,but cannot promote MRT significantly.

In vitro osteoclast-suppressing effect of sodium ibandronate / 中华医学杂志(英文版)

<p><b>BACKGROUND</b>Bisphosphonates (BPs) have been reported to reduce local recurrence in giant cell tumor (GCT) of bone because of their osteoclast-suppressing effect; however, the optimal mode of delivery and the dose and duration of treatment of BPs remain to be established. To address these issues, it is first necessary to clarify the manner of action of BPs on osteoclasts. We herein evaluated the osteoclast-suppressing effect of sodium ibandronate in vitro.</p><p><b>METHODS</b>Mouse osteoclasts (OCLs) were generated in vitro using mouse bone marrow mononuclear cells. First, various concentrations of sodium ibandronate and equal amounts of phosphate-buffered saline were added to cell culture media. The number of multinucleated cells (over three nuclei) was recorded in each group, OCL formation was compared, and the most effective concentration of sodium ibandronate was determined. Then, high concentrations of sodium ibandronate were added to the experimental cell culture media; no ibandronate was given in the control group. Comparisons were made between the two groups in terms of OCL adhesion, migration, and bone resorption.</p><p><b>RESULTS</b>OCL formation was suppressed by sodium ibandronate in vitro; the most pronounced effect was observed at the concentration of 10(-5) mol/L. OCL migration and bone resorption were significantly suppressed at this concentration, though there was no effect on OCL adhesion.</p><p><b>CONCLUSIONS</b>Sodium ibandronate was effective in suppressing OCLs and decreasing resorption in GCT. The strong anti-OCL effectiveness at a high concentration in vitro indicates a topical mode of application.</p>

Primary results of the 3-in-1 technique of Disc-FX system for the discogenic low back pain / 中华骨科杂志

ObjectiveTo investigate the clinical efficacy of the 3-in-1 technique of Disc-FX system,namely:discectomy,radiofrequency ablation and annuloplasty for discogenic low back pain in the early stage.MethodsFrom February 2010 to February 2011,40 patients with the discogenic low back pain underwent discectomy,radiofrequency ablation and annuloplasty using Disc-FX system were retrospectively analyzed,including 22 males and 18 females with an average age of 38.7 years(range,32-58 years).The visual analogue scale (VAS) scoring was applied to evaluate the back and low limb pain at preoperative,postoperative 1week,3 months,6 months,and last follow-up.The Macnab score was also evaluated at last follow-up.Results All the patients were followed up for average 13.8 months (range,6-18 months).The operative time averaged 26 min(range,20-40 min).No surgical complication was found during the follow-up.The VAS of preoperative low back pain was 6.60±1.47,VAS score of low back pain at postoperative 1 week,3 months,6 months,and final follow-up were 1.05±0.68,1.15±0.70,1.00±0.62,0.95±0.63,respectively.The postoperative VAS of low back pain decreased significantly compared with that preoperative.The VAS of preoperative limb pain was 3.05±1.23,VAS score of limb pain at postoperative 1 week,3 months,6 months,and final follow-up after operation were 1.10±0.74,1.15±0.70,1.10±0.72,0.95±0.54,respectively.The postoperative VAS of limb pain decreased significantly compared with that preoperative.The evaluation of Macnab score were excellent in 20 patients,good in 17,fair in 2,and poor in 1,suggesting an effective rate of 92.5％ (37/40).Conclusion Disc-FX system,which combined three surgical technique in one procedure,provides a new choice for orthopedics to treat discogenic low back pain.It can give satisfactory clinical outcomes during a short-term followup,but the long term clinical outcomes remains unknown.