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Objective: To investigate the therapeutic efficacy of the modified posterolateral approach on tibial plateau fractures. Methods: Forty-four patients with tibial plateau fractures were enrolled in the study and divided into two groups-control and observation-according to the different surgical procedures. The control group underwent fracture reduction via the conventional lateral approach, while the observation group underwent fracture reduction via the modified posterolateral strategy. The depth of tibial plateau collapse, active mobility, and the Hospital for Special Surgery (HSS) score and Lysholm score of the knee joint at 12 months after surgery were assessed in comparison to the two groups. Results: The amount of blood loss (p < 0.01), duration of surgery (p < 0.05), and depth of tibial plateau collapse (p < 0.001) were significantly less in the observation group compared with the control group. In addition, compared with the control group, the observation group exhibited significantly better knee flexion and extension function and significantly higher HSS and Lysholm scores at 12 months after surgery (p < 0.05). Conclusion: The modified posterolateral approach for posterior tibial plateau fractures has less intraoperative bleeding and a shorter operative time compared with the conventional lateral approach. It also effectively prevents postoperative tibial plateau joint surface loss and collapse, promotes the recovery of knee function, and has few postoperative complications and good clinical efficacy. Thus, the modified approach is worth promoting in clinical practice.
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The treatment of bone infections has always been difficult. The emergence of drug-resistant bacteria has led to a steady decline in the effectiveness of antibiotics. It is also especially important to fight bacterial infections while repairing bone defects and cleaning up dead bacteria to prevent biofilm formation. The development of biomedical materials has provided us with a research direction to address this issue. We aimed to review the current literature, and have summarized multifunctional antimicrobial materials that have long-lasting antimicrobial capabilities that promote angiogenesis, bone production, or "killing and releasing." This review provides a comprehensive summary of the use of biomedical materials in the treatment of bone infections and a reference thereof, as well as encouragement to perform further research in this field.
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Objective:To observe the effect of icariin on the osteoporosis of the ovariectomized rats,and to explore the mechanism.Methods:Fifty female rats aged 6 months were randomly divided into sham operation group, model group,positive drug group,low dose of icariin group and high dose of icariin group (n= 10).The rats in positive drug group were given with 1 mg· kg-1 nilestriol every week;the rats in low and high doses of icariin groups were given with 50 and 100 mg · kg-1 icariin every day.The bilateral ovaries of rats were excised by operation to establish the osteoporosis models.2 weeks after operation,the rats were treated with icariin for 12 weeks,and then they were sacrificed by drawing blood from abdominal aorta under anesthesia condion.The bone mineral density (BMD),serum biochemical indicators,bone histomorphology and the expressions of apoptosis-related proteins were detected.Results:Compared with sham operation group,the BMD of the rats in model group was decreased (P <0.01),the serum calcium level was decreased (P <0.05),and the serum phosphorus level was increased (P <0.05),and the serum BGP,ALP,NO and NOS levels were significantly decreased (P <0.05 or P <0.01).Compared with model group,the BMD of the rats in positive drug group and high dose of icariin group were obviously increased (P < 0.01 ), the serum calcium levels were increased, the phosphorus levels were decreased (P <0.05),and the BGP and ALP levels were increased significantly (P < 0.05 ). Compared with control group,the cortical in model group was thinned,the width of bone trabecula was reduced,the Bax and Caspase-3 expression levels in bone tissue were increased,and the Bcl-2 expression level was decreased.Compared with model group,the cortical in icariin group was thicked,the width of bone trabecula was increased,the Bax and Caspase-3 expression levels were decreased,and the Bcl-2 expression level was increased (P <0.05 or P <0.01). Conclusion:Icariin can protect the osteoporosis of ovariectomized rats,the function may be related to the inhibition of apoptosis.
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@# Objective To observe the effect of the soft tissues injury around atlantoaxial joint on memory abilities of mice.Methods 44 mice were divided into the model group and control group with 22 animals in each group.The soft tissues around atlantoaxial joint were injured in the model group by surgery between the first and the second cervical vertebrae.The changes of learning and memory of mice were observed with step-down avoidance test,water-maze test and hole-board test;the expression of caspase-3 in hippocampus was observed by immunohistochemical staining.Results Compared with the control group,escape latency was longer and wrong times were more in water-maze test of the model group(P<0.01). In step-down avoidance test of the model group,the reaction period prolonged and wrong times increased obviously(P<0.01).In hole-board test,the latency period prolonged and the times of extending the holes decreased significantly(P<0.01).Degenerated or dead neuron in hippocampus of surgery-treated mice was found scatteredly or continuously with HE staining,the expression of caspase-3 protein was showed positive with immunohistochemical staining.Conclusion The soft tissues injury arround atlantoaxial joint can induce abnormality of the stability of cervical vertebra,which aggravated the aging process of the mice and decreased abilities of learning and memory.
