置换

The effect of replacing the water in West lake is mostly rested on the area which can be replaced and the influx, whenas the size of the area is mostly related with field structure.

西湖水体的置换效果主要取决于可被置换区域的面积和引水量，而可被置换区域大小主要取决于流场结构。

Both hip arthroplasty and AO compressive cannular are reasonable choices for treatment of displaced femoral neck fracture in the elderly, but the results of group A is better than the group B.

人工关节置换术和AO加压空心螺钉均是治疗老年股骨颈骨折的有效方法，但人工关节置换术可提高老年人的生活质量，减低术后并发症的发生率，所以人工关节置换的效果优于AO加压空心螺钉。

Both hip arthroplasty and AO compressive cannular are reasonable choices for treatment of displaced femoral neck fracture in the elderly, but the results of group A is better than the group B. The rate of postoperative complication of group A is lower than the group B.

人工关节置换术和AO加压空心螺钉均是治疗老年股骨颈骨折的有效方法，但人工关节置换术可提高老年人的生活质量，减低术后并发症的发生率，所以人工关节置换的效果优于AO加压空心螺钉。

There with 8 cases of postoperative complication in group a (19.5).there were 12 cases of postoperative complication in group b(42.9%).conclusion both hip arthroplasty and ao compressive cannular are reasonable choices for treatment of displaced femoral neck fracture in the elderly, but

人工关节置换术和ao加压空心螺钉均是治疗老年股骨颈骨折的有效方法，但人工关节置换术可提高老年人的生活质量，减低术后并发症的发生率，所以人工关节置换的效果优于ao加压空心螺钉。

There were 12 cases of postoperative complication in group B(42.9%).Conclusion Both hip arthroplasty and AO compressive cannular are reasonable choices for treatment of displaced femoral neck fracture in the elderly, but the results of group A is better than the group B. The rate of postoperative complication of group A is lower than the group B.

人工关节置换术和AO加压空心螺钉均是治疗老年股骨颈骨折的有效方法，但人工关节置换术可提高老年人的生活质量，减低术后并发症的发生率，所以人工关节置换的效果优于AO加压空心螺钉。

Both hip arthroplasty and AO compressive cannular are reasonable choices for treatment of displaced femoral neck fracture in the elderly, but the results of group A is better than the group B. The rate of postoperative complication of group A is lower than the group B. So hip arthroplasty is a better way between two methods for the elderly with poor conditions.

人工关节置换术和AO加压空心螺钉均是治疗老年股骨颈骨折的有效方法，但人工关节置换术可提高老年人的生活质量，减低术后并发症的发生率，所以人工关节置换的效果优于AO加压空心螺钉。

Both hip arthroplasty and AO compressive cannular are reasonable choices for treatment of displaced femoral neck fracture in the elderly, but the results of group A is than the group B. The rate of postoperative complication of group A is lower than the group B. So hip arthroplasty is a better way between two methods for the elderly with poor conditions.

人工关节置换术和AO加压空心螺钉均是治疗老年股骨颈骨折的有效方法，但人工关节置换术可提高老年人的生活质量，减低术后并发症的发生率，所以人工关节置换的效果优于AO加压空心螺钉。

objective to compare the effects of hip arthroplasty and ao compressive cannular in treatment of the displaced fracture of femoral neck in elderly.methods from 1995.5 to 2004.11, 78 elderly patients of over 65 years old with displaced femoral neck fracture were operated with hip arthroplasty and ao compressive cannular.

目的 比较人工关节置换术与ao加压空心螺钉术治疗老年人有移位股骨颈骨折的疗效。方法将1995年5月～2004年11月我院收治的78例年龄在65周岁以上的有移位的新鲜股骨颈骨折患者进行回顾性研究，将病例分为a、b两组，a组为人工关节置换组，b组为ao加压空心螺钉治疗组。ao加压空心螺钉治疗组随访12～91个月，平均41.7个月，随访人工关节置换组12～96个月，平均40.3个月。

1.Two level artificial cervical disc replacement can maintain stress in the caudad (C5/6,C6/7) zygapophyseal joint, thus reconstruct biomechanical property of cervical spine.

颈椎双节段人工椎间盘置换后置换下位节段和邻近下位节段关节突关节内压力与完整标本相近，提示颈椎双节段人工椎间盘置换能够重建颈椎生物力学性能。2。

Results from the present study show that compared with collum femoris preserving and stemless hip prosthesis, resurfacing arthroplasty may be the more effective treatment for avascular necrosis of femoral head with less complications and lower rate of revision.

提示与保留股骨颈全髋置换及无柄关节置换相比，表面置换对于恢复患者髋关节功能有着明显的优势，并发症少，翻修率低，对于年轻患者是一个较好的选择。

Do you know, i need you to come back

你知道吗，我需要你回来

Yang yinshu、Wang xiangsheng、Li decang,The first discovery of haemaphysalis conicinna.

1〕 杨银书，王祥生，李德昌。安徽省首次发现嗜群血蜱。