全文获取类型
收费全文 | 4984篇 |
免费 | 257篇 |
国内免费 | 38篇 |
专业分类
耳鼻咽喉 | 63篇 |
儿科学 | 215篇 |
妇产科学 | 164篇 |
基础医学 | 534篇 |
口腔科学 | 214篇 |
临床医学 | 397篇 |
内科学 | 1135篇 |
皮肤病学 | 92篇 |
神经病学 | 301篇 |
特种医学 | 108篇 |
外科学 | 677篇 |
综合类 | 254篇 |
一般理论 | 18篇 |
预防医学 | 256篇 |
眼科学 | 151篇 |
药学 | 390篇 |
中国医学 | 87篇 |
肿瘤学 | 223篇 |
出版年
2024年 | 3篇 |
2023年 | 44篇 |
2022年 | 161篇 |
2021年 | 268篇 |
2020年 | 119篇 |
2019年 | 160篇 |
2018年 | 213篇 |
2017年 | 100篇 |
2016年 | 124篇 |
2015年 | 184篇 |
2014年 | 211篇 |
2013年 | 261篇 |
2012年 | 361篇 |
2011年 | 434篇 |
2010年 | 224篇 |
2009年 | 199篇 |
2008年 | 307篇 |
2007年 | 248篇 |
2006年 | 272篇 |
2005年 | 253篇 |
2004年 | 249篇 |
2003年 | 192篇 |
2002年 | 221篇 |
2001年 | 58篇 |
2000年 | 29篇 |
1999年 | 46篇 |
1998年 | 32篇 |
1997年 | 27篇 |
1996年 | 26篇 |
1995年 | 15篇 |
1994年 | 20篇 |
1993年 | 14篇 |
1992年 | 18篇 |
1991年 | 17篇 |
1990年 | 15篇 |
1989年 | 19篇 |
1988年 | 15篇 |
1987年 | 11篇 |
1986年 | 12篇 |
1985年 | 4篇 |
1984年 | 9篇 |
1983年 | 10篇 |
1982年 | 16篇 |
1981年 | 13篇 |
1980年 | 7篇 |
1979年 | 3篇 |
1978年 | 8篇 |
1977年 | 6篇 |
1976年 | 10篇 |
1974年 | 5篇 |
排序方式: 共有5279条查询结果,搜索用时 15 毫秒
71.
Mubin I. Syed Talal Akhter Uzma Wahid Azim Shaikh Mohsin Mirza Granville J. Tengesdahl 《Cardiovascular Revascularization Medicine》2012,13(2):141.e7-141.e11
Subclavian stenting can be extremely difficult in a hostile type II aortic arch (with acute angulation of the subclavian artery origin) or type III aortic arch. This case illustrates use of a low-profile system to gain through-and-through (flossing) access through the brachial artery to facilitate stenting via the femoral approach. This approach can be useful in patients with small brachial arteries where the risk of complication may be high if a standard vascular sheath was placed for stenting via the brachial approach. This technique also avoids the use of a surgical cut down. 相似文献
72.
73.
74.
75.
76.
The leukocyte adherence inhibition assay (LAI) was used to measure cell-mediated immunity in 26 patients with malignant glial neoplasms and in 41 control subjects. A significant inhibition of leukocyte adherence was observed in 21 out of 26 (80%) patients with malignant astrocytic gliomas in the presence of a 3M KC1 extract of glioma tissue compared to that of normal brain extract. Among the control group, no significant difference in the percentage of nonadherent leukocytes (NAL) was noted in the presence of either antigen. To study the specificity of the reaction, 3M KC1 extracts of meningioma, pituitary tumor, carcinoma of breast, carcinomas of lung, melanoma, brain, and heart tissues were employed as nonspecific antigens. Such studies revealed significantly lower values of NAL.These data indicate that patients with malignant glial neoplasms manifest a cellular-immune response to glioma-associated antigens that can be measured by the tube LAI assay and that LAI assay may render additional useful information in the diagnostic and prognostic evaluation of malignant glial neoplasms. 相似文献
77.
78.
Association between occlusal force distribution in implant overdenture prostheses and residual ridge resorption
下载免费PDF全文
![点击此处可从《Journal of oral rehabilitation》网站下载免费的PDF全文](/ch/ext_images/free.gif)
T. Khuder N. Yunus E. Sulaiman N. Ibrahim T. Khalid M. Masood 《Journal of oral rehabilitation》2017,44(5):398-404
This study aimed to investigate residual ridge resorption (RRR) of anterior and posterior maxillary and mandibular edentulous ridges, in patients treated with mandibular implant overdentures (IOD) and compare with conventional complete denture (CD) wearers, and to determine at each location, the association of RRR with the occlusal forces distribution and other patients’ variables. The anterior and posterior RRR of IOD (six males, 17 females) and CD (12 males, 11 females) groups were determined using baseline and follow‐up dental panaromic radiographs (DPT) (mean intervals 4 ± 1·8 years). The bone ratios were calculated using proportional area: anatomic to fixed reference areas and mean difference of ratios between the intervals determined RRR. The ridge locations included anterior and posterior maxillary and posterior mandibular arches. The T‐Scan III digital occlusal system was used to record anterior and posterior percentage occlusal force (%OF) distributions. There were significant differences in anterior and posterior %OF between treatment groups. Two‐way anova showed RRR was significant for arch locations (P = 0·005), treatment group (IOD versus CD) (P = 0·001), however, no significant interaction (P = 0·799). Multivariate regression analyses showed significant association between RRR and %OF at anterior maxilla (P = 0·000) and posterior mandible (P = 0·023) and for treatment groups at posterior maxilla (P = 0·033) and mandibular areas (P = 0·021). Resorption was observed in IOD compared to CD groups, with 8·5% chance of less resorption in former and 7·8% in the latter location. Depending on arch location, ridge resorption at various locations was associated with occlusal force distribution and/or treatment groups (implant prostheses or conventional complete dentures). 相似文献
79.
Jameela A.S.J. Al-Khalidi Bader Alenezi Wafa Al-Qabandy Eman Abo-Hamra Khalid Husain Haifa A. Askar Ayyampalayam P. Jagannathan Hisham Abu-El-Naga Guy W. Neff 《Arab Journal Of Gastroenterology》2012,13(4):178-179
Background and study aimsSince the introduction of liver transplantation (LTx) in children suffering from liver failure in 1963, many centres around the world have offered this service to children that have no other alternative. The aim of this retrospective study is to analyse the results of paediatric liver transplant in Kuwait over the last decade.Patients and methodsA retrospective chart review was done involving paediatric patients during the time period of 1995–2004. The information collected included patient demographics, indications for liver transplantation, survival of both patient and allograft, and complications.ResultsA total of 16 cases were found and analysed. The mean age was 3.6 years (ranged 5 months–17 years). There were nine boys and seven girls. The most common indications for LTx were biliary atresia and metabolic liver disease. All the liver transplants were done abroad. There were totally nine deceased donor and seven living related cases. The complications were acute cellular rejection in five, hypertension in two, biliary complications in four, cytomegalovirus (CMV) infection in three and post lymphoproliferative disease in two cases. All but one patient are presently alive.ConclusionThe above information demonstrates that LTx in Kuwati children is safe and improves the quality of life for those that would otherwise have no other alternative. 相似文献
80.