全文获取类型
收费全文 | 1177篇 |
免费 | 96篇 |
国内免费 | 12篇 |
专业分类
耳鼻咽喉 | 36篇 |
儿科学 | 23篇 |
妇产科学 | 21篇 |
基础医学 | 124篇 |
口腔科学 | 52篇 |
临床医学 | 209篇 |
内科学 | 217篇 |
皮肤病学 | 88篇 |
神经病学 | 52篇 |
特种医学 | 96篇 |
外科学 | 94篇 |
综合类 | 39篇 |
一般理论 | 2篇 |
预防医学 | 100篇 |
眼科学 | 6篇 |
药学 | 77篇 |
中国医学 | 1篇 |
肿瘤学 | 48篇 |
出版年
2021年 | 21篇 |
2020年 | 16篇 |
2019年 | 17篇 |
2018年 | 17篇 |
2017年 | 15篇 |
2016年 | 26篇 |
2015年 | 19篇 |
2014年 | 21篇 |
2013年 | 37篇 |
2012年 | 46篇 |
2011年 | 41篇 |
2010年 | 29篇 |
2009年 | 42篇 |
2008年 | 41篇 |
2007年 | 59篇 |
2006年 | 33篇 |
2005年 | 39篇 |
2004年 | 34篇 |
2003年 | 21篇 |
2002年 | 23篇 |
2001年 | 23篇 |
2000年 | 30篇 |
1999年 | 23篇 |
1998年 | 42篇 |
1997年 | 36篇 |
1996年 | 36篇 |
1995年 | 31篇 |
1994年 | 22篇 |
1993年 | 24篇 |
1992年 | 17篇 |
1991年 | 22篇 |
1990年 | 34篇 |
1989年 | 27篇 |
1988年 | 29篇 |
1987年 | 32篇 |
1986年 | 29篇 |
1985年 | 25篇 |
1984年 | 18篇 |
1983年 | 16篇 |
1982年 | 11篇 |
1979年 | 10篇 |
1978年 | 18篇 |
1976年 | 9篇 |
1975年 | 8篇 |
1974年 | 10篇 |
1973年 | 9篇 |
1972年 | 9篇 |
1971年 | 8篇 |
1969年 | 10篇 |
1968年 | 12篇 |
排序方式: 共有1285条查询结果,搜索用时 187 毫秒
1.
Erica Kumar Nimesh R. Patel Elizabeth G. Demicco Judith V.M.G. Bovee Andre M. Olivera Dolores H. Lopez‐Terrada Steven D. Billings Alexander J. Lazar Wei‐Lien Wang 《Journal of cutaneous pathology》2016,43(12):1143-1149
Nodular fasciitis is a benign self‐limited myofibroblastic neoplasm, which usually involves the upper extremities and trunk of young patients. These tumors have been shown to harbor a translocation involving the MYH9 and USP6 genes, leading to overexpression of the latter. We report seven cases of nodular fasciitis with cutaneous presentations. All cases involved the dermis, with six involving the superficial subcutis, and one auricular tumor extending into cartilage. All cases showed USP6 rearrangement by fluorescence in situ hybridization; in two of three cases, the characteristic MYH9‐USP6 fusion was shown by RT‐PCR. All patients underwent conservative resection. Nodular fasciitis is an uncommon mesenchymal neoplasm that can occasionally present in superficial locations and is sometimes mistaken for a malignant process. Molecular testing can be useful to distinguish this entity from other cutaneous spindle cell tumors. 相似文献
2.
3.
4.
5.
Graves CE Berkowitz RJ Proskin HM Chase I Weinstein P Billings R 《Journal of dentistry for children (Chicago, Ill.)》2004,71(2):114-117
PURPOSE: The objective of this study was to assess the relationship between the number of stainless steel crowns (SSCs) placed, number of surfaces at risk (SAR) post dental surgery, and the risk for relapse in patients treated for Early Childhood Caries (ECC). METHODS: The study population consisted of 57 children treated for ECC under general anesthesia, ranging in age from 2.3 to 7.3 years old at the time of entry. Dental surgery utilized an aggressive approach: teeth that had necrotic pulps or were nonrestorable were extracted; decayed primary mandibular incisors that could not be treated by stripping were extracted; primary maxillary incisors with 3 or more carious surfaces were extracted; single-surface lesions of primary molars that did not compromise cusp integrity were restored with intracoronal amalgam restorations; primary maxillary, incisors and canines with smooth-surface lesions affecting 2 or less surfaces were treated with intracoronal composites; primary molars and canines requiring vital pulp therapy were restored with SSCs; primary molars with caries lesions affecting 2 or more surfaces (including smooth-surface, white-spot lesions) were restored with SSCs; primary canines with caries affecting 3 or more surfaces were restored with stainless steel crowns; topical fluoride was applied after all restorative therapy was completed. The cohort was examined for new caries lesions 6 months post dental surgery. Relapse was defined as the presence of new smooth-surface caries lesions as defined by Radike. Comparisons between relapse (R) and nonrelapse (NR) groups, with respect to the number of SSCs placed and the number of SAR, were performed using t tests and Wilcoxon tests. A 0.05 level of significance was employed in all statistical tests. RESULTS: Twenty-one of the 57 (37%) patients relapsed. No statistically significant difference for the number of SSCs placed or SAR existed between the R group (SSCs: mean = 4.57, median = 4 +/- 2.18; SAR: mean = 39.76, median = 40 +/- 13.62) and NR group (SSCs: mean=5.44, median = 5.5 +/- 2.62; SAR: mean = 39.98, median = 39.5 +/- 15.19). CONCLUSIONS: The risk for relapse in children treated for ECC is not associated with the number of SSCs placed or SAR; aggressive dental surgery for ECC does not result in acceptable clinical outcomes. 相似文献
6.
7.
8.
Dental decay is the most prevalent and preventable chronic disease of childhood. Underserved populations are at a health disadvantage with greater unmet needs. This article will discuss the components of oral health promotion programs and facilities designed to meet the needs of underserved populations. These components include organization, needs assessment, resource assessment, priority-setting and planning, oral health intervention, and monitoring and evaluation. Examples from the experience of the San Diego Children's Dental Health Association will be presented in the discussion of each component. 相似文献
9.
10.