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长春至四平高速公路投入运营已十多年,路面车辙病害严重。本文通过对长平高速公路路面车辙病害的分析研究,总结了设计和施工中适合东北地区沥青路面的养护维修经验。 相似文献
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Ｔｈｅｃａｎｃｅｒｏｆｇａｌｌｂｌａｄｄｅｒｉｓａｃｏｍｍｏｎｍａｌｉｇｎａｎｔｔｕｍｏｒｏｆｔｈｅｂｉｌｉａｒｙｔｒａｃｔ ,ｗｈｉｃｈｉｓｈａｒｄｔｏｄｉａｇｎｏｓｅａｎｄｈａｓａｐｏｏｒｐｒｏｇｎｏｓｉｓ .Ｉｔｉｓａｌｗａｙｓａｃｃｏｍｐａｎｉｅｄｂｙｃｈｏｌｅｃｙｓｔｏｌｉｔｈｉａｓｉｓ .Ｔｈｅ ｐａｔｈｏｌｏｇｉｃａｌｒｅｓｅａｒｃｈｆｏｒｃｈｏｌｅｃｙｓｔｏｌｉｔｈｉａｓｉｓ ,ａｄｉｓｅａｓｅｃｏｍｍｏｎｌｙａｎｄｆｒｅｑｕｅｎｔｌｙｗｅｒｅｆｏｕｎｄｉｎｃｌｉｎｉｃｓ ,ｓｈｏｗｅｄｔ… 相似文献
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Objective To find an ideal biomaterial for internal fixation. Methods Forty rabbits with fracture of the femur diaphysis (superioreondyle) were treated by intramedullary nailing of femur with composites rod of resorbable DL-polylactic acid (PDLLA)-ealcium metaphosphate (CMP), while steinmann‘s pin as control. The fracture healing, the material degradation and its mechanical properties were studied by X-ray films, macroscopic, microscopic and electron microscopic observations. Results No significant inflammatory reaction was found, and all the osteotomies were healed, while material was resorbed. Conclusion The PDLLA-CMP has excellent biocompatibility and mechanical properties, and it can be a promising implant material in orthopaedics surgery. 相似文献
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