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   8654篇
  免费   453篇
  国内免费   260篇
耳鼻咽喉   47篇
儿科学   16篇
妇产科学   102篇
基础医学   1024篇
口腔科学   1449篇
临床医学   748篇
内科学   147篇
皮肤病学   3篇
神经病学   105篇
特种医学   1224篇
外科学   3239篇
综合类   813篇
预防医学   98篇
眼科学   37篇
药学   189篇
  3篇
中国医学   72篇
肿瘤学   51篇
  2024年   35篇
  2023年   148篇
  2022年   409篇
  2021年   436篇
  2020年   359篇
  2019年   287篇
  2018年   359篇
  2017年   359篇
  2016年   334篇
  2015年   275篇
  2014年   540篇
  2013年   621篇
  2012年   495篇
  2011年   527篇
  2010年   395篇
  2009年   491篇
  2008年   526篇
  2007年   459篇
  2006年   355篇
  2005年   267篇
  2004年   241篇
  2003年   222篇
  2002年   158篇
  2001年   149篇
  2000年   115篇
  1999年   131篇
  1998年   117篇
  1997年   90篇
  1996年   92篇
  1995年   57篇
  1994年   45篇
  1993年   35篇
  1992年   55篇
  1991年   27篇
  1990年   18篇
  1989年   17篇
  1988年   12篇
  1987年   9篇
  1986年   18篇
  1985年   17篇
  1984年   13篇
  1983年   9篇
  1982年   13篇
  1981年   8篇
  1980年   7篇
  1979年   3篇
  1977年   2篇
  1976年   2篇
  1975年   4篇
  1974年   2篇
排序方式: 共有9367条查询结果,搜索用时 15 毫秒
61.
IntroductionThe repair of a deltoid ligament injury, following an ankle fracture with involvement of the syndesmosis, has no univocal consensus. Also the surgical strategies in case of a subsequent chronic instability are still under debate. In this work the result of a double bundle anatomic reconstruction of deltoid ligament with ipsilateral autologous gracilis muscle tendon is presented.Case reportA 50 year old active male patient came to our attention with a catastrophic medial ankle instability, a severe pronation of the hindfoot and disabling ankle pain. He reported a Weber type B fracture of the left ankle with a lesion of the syndesmosis treated with anatomic plate and screws and a transyndesmotic screw 8 months before. The imaging showed a complete deltoid ligament lesion. Due to the impossibility of a direct repair of the ligament, we performed the reconstruction of the medial ligamentous complex with an autologous gracilis tendon graft. 10 months after the medial ligamentous complex reconstruction, the patient showed an excellent recovery of walking ability, disappearance of pain under load and resumed an active lifestyle.DiscussionThe deltoid ligament has a key role in ankle joint stability and its integrity promotes the recovery after ankle fractures. However, its lesion is often left untreated in the acute setting. The result of a chronic untreated deltoid ligament injury could be extremely disabling and the ligament reconstruction, when an optimal native deltoid ligament repair is not achievable, is the choice to restore ankle function and stability.ConclusionIn the delayed treatment of a deltoid ligament rupture the described double bundle anatomic reconstruction with autologous tendon graft can be an effective and suitable option.  相似文献   
62.
PurposeThe aim of this study was to provide a short term comparison in radiological and clinical outcome between Bi-Cruciate Retaining (BCR)- and Cruciate Retaining (CR) Total Knee Arthroplasty (TKA).MethodsThe cohort consists of 122 patients undergoing a TKA with PSI, equally distributed over the BCR- and CR-TKA group. Perioperative conditions were observed and radiological images were analysed pre-, 6-weeks, and 1-year postoperative to quantify alignment differences between BCR- and CR-TKA. Preoperatively predicted templates were compared with the implanted size to determine predictive value. In addition mean range of motion and revision rates were determined in both groups.ResultsNo significant difference was observed in amount of outliers in component alignment between BCR- and CR-TKA. Outliers of the Hip-Knee-Ankle-Axis (HKA-axis) occurred significantly more frequent (P = 0.009) in the BCR-group (37.7%) compared to CR-TKA (18.0%). No clinically relevant differences regarding the predictive sizing of implant components was obtained. No significant differences were observed in revision rates (P = 1.000) and ROM (p = 0.425) between the BCR-groep and CR-group at 2-years FU.ConclusionThis study illustrates that although the HKA-axis was not fully restored, bi-cruciate retaining surgical technique for BCR-TKA is safe and effective with comparable radiological and clinical outcome as CR TKA. Randomized controlled trials with longer follow up on the HKA-axis alignment and clinical parameters are needed to confirm the presented results and should focus on possible cut off values concerning leg axis in order to define in what patients a BCR-TKA can safely be used.Level of evidence IVRetrospective Case Controlled Study.  相似文献   
63.
目的:探讨腹股沟脐内侧韧带滑动性疝的诊断及治疗方法。方法:回顾性分析2018年1月至2020年1月收治的13例腹股沟脐内侧韧带滑动性疝患者的临床资料,患者均行腹腔镜经腹腹膜前疝修补术,观察治疗效果。结果:13例患者均成功实施腹腔镜经腹腹膜前疝修补术,手术时间36~56 min,平均(43.4±20.3)min;住院2~3 d,平均(2.5±1.2)d;术后随访8个月~2年,未损伤膀胱、精索等疝囊周围器官,术后未出现血清肿、术区慢性疼痛及复发等情况。结论:腹股沟脐内侧韧带滑动性疝只要术前仔细查体,术中细致解剖,可避免脏器损伤,但术者需具备腹腔镜疝修补的手术经验,熟悉解剖结构,术中及时作出诊断。  相似文献   
64.
65.
66.
67.
Study Design: Systematic review and meta-analysis.Objective: To compare the effectiveness and safety between anterior and posterior approach, and determine the best surgical methods for the treatment of ossification of the posterior longitudinal ligament (OPLL) in the cervical spine.Methods: We searched the Cochrane Library, PubMed, CNKI and Wanfang Med Data databases from January 2007 to March 2018. Japanese Orthopaedic Association (JOA) scores, cervical lordosis, functional recovery rates, excellent and good outcomes of the surgical approaches, and complication and reoperation rates were analyzed. RevMan 5.3 was utilized for data analysis.Results: Eleven studies were included in the meta-analysis. By comparing the anterior and posterior approaches for the treatment of OPLL in the cervical spine, statistically significant differences were found in the preoperative initial JOA, the postoperative final JOA scores, functional recovery rates, complication rates, excellent and good outcomes of the surgical approaches and reoperation rates. However, no statistically significant difference in the occurrence of the preoperative and postoperative cervical lordosis was noted.Conclusion: The anterior approach is superior to the posterior approach in terms of the postoperative final JOA score, functional recovery rate, and clinical outcomes. Although the complication and reoperation rates of the anterior approach are higher than those of the posterior approach. We recommend the anterior approach for the treatment of OPLL when patients with occupying ratio ≥ 60%. In addition, high-quality studies with long-term follow-up and large sample size are also needed.  相似文献   
68.
69.
70.
目的 比较人类牙龈成纤维细胞(HGF)与牙周韧带细胞(PDLC)在两种玻璃离子水门汀(GIC)上的附着及增殖情况。方法 利用体外细胞培养技术及^3H-TdR掺入法检测HGF及PDLC在两种GIC上的附着及DNA合成。结果 HGF与PDLC在培养板上的附着及DNA合成差异无显著性(P〉0.05),但HGF在GIC上的附着及DNA合成明显强于PDLC(P〈0.05)。结论 Ketac Fil和Fuji  相似文献   
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