首页 | 本学科首页   官方微博 | 高级检索  
文章检索
  按 检索   检索词:      
出版年份:   被引次数:   他引次数: 提示:输入*表示无穷大
  收费全文   350817篇
  免费   31336篇
  国内免费   23550篇
耳鼻咽喉   3243篇
儿科学   3959篇
妇产科学   5401篇
基础医学   43895篇
口腔科学   6281篇
临床医学   47564篇
内科学   54754篇
皮肤病学   3528篇
神经病学   20767篇
特种医学   12988篇
外国民族医学   215篇
外科学   36788篇
综合类   51664篇
现状与发展   76篇
一般理论   27篇
预防医学   21293篇
眼科学   10192篇
药学   35246篇
  334篇
中国医学   17715篇
肿瘤学   29773篇
  2024年   1006篇
  2023年   5100篇
  2022年   13232篇
  2021年   16705篇
  2020年   12234篇
  2019年   11123篇
  2018年   11914篇
  2017年   10331篇
  2016年   9754篇
  2015年   14834篇
  2014年   18399篇
  2013年   16165篇
  2012年   23914篇
  2011年   26939篇
  2010年   16608篇
  2009年   12848篇
  2008年   18022篇
  2007年   18127篇
  2006年   18078篇
  2005年   17655篇
  2004年   11474篇
  2003年   10519篇
  2002年   9078篇
  2001年   9399篇
  2000年   10167篇
  1999年   10571篇
  1998年   6013篇
  1997年   5880篇
  1996年   4623篇
  1995年   4178篇
  1994年   3432篇
  1993年   2305篇
  1992年   3709篇
  1991年   3190篇
  1990年   2816篇
  1989年   2633篇
  1988年   2256篇
  1987年   1976篇
  1986年   1706篇
  1985年   1449篇
  1984年   855篇
  1983年   663篇
  1982年   398篇
  1981年   352篇
  1980年   290篇
  1979年   401篇
  1977年   170篇
  1974年   185篇
  1973年   175篇
  1972年   169篇
排序方式: 共有10000条查询结果,搜索用时 0 毫秒
1.
The present study aimed at examining the curative effect of modified posterior operation on treatment of Kümmell''s disease.About 30 patients of Kümmell''s disease with complete image and clinical data treated during June 2004 to July 2013 were conducted with anterior and posterior approaches, respectively. Kyphotic Cobb angle, fractured vertebra wedge angle, and the anterior and posterior heights of fractured vertebra were all measured through x-ray before and after operation, and the pain visual analog scale (VAS) was determined for evaluating the effect of operations. The injury and restoration of neurological function were assessed using Frankel classification.Patients in group A were treated with anterior operation, whereas group B was posterior operation. Postoperatively, VAS score, kyphotic Cobb angle, anterior vertebra height, and pathologic vertebra wedge angle were all significantly improved in patients with Kümmell''s disease receiving modified posterior operation (group B). Similar results were also observed in patients with anterior operation. The improvement of VAS and correction rate of kyphotic Cobb angle indicated equivalent effects of posterior and anterior operations. Meanwhile, alleviated neurological function damage was observed in 2 groups. Relevant factor analysis illustrated that there was no significant correlation of the severity and improvement rate of pain symptoms with age, medical history, anterior and posterior vertebra heights, kyphotic Cobb angle, and pathological vertebra wedge angle.Compared with traditional anterior approach, modified posterior operation, adopting transpedicular vertebral body grafting combined with vertebral pedicle screw fixation, could produce equivalent effects on kyphosis correction, pain relief, and improvement of neurological function in patients with Kümmell''s disease.  相似文献   
2.
3.
4.
5.
6.
The objective of this study was to investigate short segment decompression of degenerative lumbar scoliosis (DLS) and the efficiency of fusion treatment.After DLS surgery, the patients were retrospectively reviewed using the VAS (visual analog scale) and ODI (Oswestry Disability Index) to assess clinical outcomes. All patients underwent posterior lumbar decompressive laminectomy, pedicle screw internal fixation, and posterolateral bone graft fusion surgery. Radiographic measurements included the scoliotic Cobb angle, the fused Cobb angle, the anterior intervertebral angle (AIA), the sagittal intervertebral angle (SIA), and lumbar lordosis angle. The relationships between these parameters were examined by bivariate Pearson analysis and linear regression analysis.Preoperatively, the Cobb angle at the scoliotic segment was 15.4°, which decreased to 10.2° immediately following surgery (P < 0.05). The AIA significantly increased by the last follow-up (4.4 ± 3.4) compared with pre- and postoperative values (2.5 ± 2.8 and 2.2 ± 2.4, respectively; P < 0.05). However, the scoliotic Cobb angle and the AIA did not correlate with the VAS or ODI scores. At the final follow-up, no patients had pseudoarthrosis or internal instrumentation-related complications.Short fusion surgical treatment results in limited DLS correction, with correction loss over time. The AIA between the upper adjacent segment and proximal fused vertebra continues to increase postoperatively, which does not exacerbate clinical symptoms, as reflected by the low reoperation rates for repairing degeneration at adjacent levels.  相似文献   
7.
8.
9.
10.
设为首页 | 免责声明 | 关于勤云 | 加入收藏

Copyright©北京勤云科技发展有限公司  京ICP备09084417号