全文获取类型
收费全文 | 17246篇 |
免费 | 941篇 |
国内免费 | 155篇 |
专业分类
耳鼻咽喉 | 138篇 |
儿科学 | 347篇 |
妇产科学 | 588篇 |
基础医学 | 1899篇 |
口腔科学 | 448篇 |
临床医学 | 1379篇 |
内科学 | 4411篇 |
皮肤病学 | 300篇 |
神经病学 | 1848篇 |
特种医学 | 729篇 |
外科学 | 2618篇 |
综合类 | 49篇 |
一般理论 | 1篇 |
预防医学 | 593篇 |
眼科学 | 310篇 |
药学 | 1039篇 |
中国医学 | 24篇 |
肿瘤学 | 1621篇 |
出版年
2024年 | 22篇 |
2023年 | 177篇 |
2022年 | 345篇 |
2021年 | 603篇 |
2020年 | 390篇 |
2019年 | 478篇 |
2018年 | 602篇 |
2017年 | 408篇 |
2016年 | 492篇 |
2015年 | 553篇 |
2014年 | 759篇 |
2013年 | 898篇 |
2012年 | 1382篇 |
2011年 | 1381篇 |
2010年 | 760篇 |
2009年 | 697篇 |
2008年 | 1102篇 |
2007年 | 1103篇 |
2006年 | 1060篇 |
2005年 | 960篇 |
2004年 | 924篇 |
2003年 | 791篇 |
2002年 | 679篇 |
2001年 | 155篇 |
2000年 | 161篇 |
1999年 | 173篇 |
1998年 | 154篇 |
1997年 | 113篇 |
1996年 | 116篇 |
1995年 | 104篇 |
1994年 | 72篇 |
1993年 | 63篇 |
1992年 | 93篇 |
1991年 | 91篇 |
1990年 | 52篇 |
1989年 | 54篇 |
1988年 | 42篇 |
1987年 | 43篇 |
1986年 | 41篇 |
1985年 | 32篇 |
1984年 | 38篇 |
1983年 | 31篇 |
1982年 | 27篇 |
1981年 | 20篇 |
1980年 | 10篇 |
1979年 | 8篇 |
1976年 | 8篇 |
1971年 | 8篇 |
1970年 | 9篇 |
1969年 | 7篇 |
排序方式: 共有10000条查询结果,搜索用时 15 毫秒
1.
Carlo De-Carolis Geraldine-A. Boyd Luca Mancinelli Stefano Pagano Stefano Eramo 《Medicina oral, patología oral y cirugía bucal》2015,20(2):e205-e210
With easy chemical synthesis from its precursor, methamphetamine (MA) is now widespread in many countries. The abuse of methamphetamine is associated with several negative effects on health, because MA is a neurotoxin and a dangerous central nervous system stimulant. It changes levels of neurotransmitters in the brain, releasing dopamine and inhibiting nor epinephrine uptake which increases sympathetic nervous system activity and can lead to cardiac arrhythmia, hypertension and tachypnea. The consequences of MA abuse are clearly manifested in oral diseases (like “meth mouth”) which is characterised by extensive caries, teeth grinding with ensuing dental wear and trismus. The present review was designed to fill the gap in knowledge about methamphetamine abuse in the European Union (EU) and to illustrate the main clinical effects of prolonged use. After describing the pharmacology and systemic effects of methamphetamine and concentrating on its effects on the mouth, the present review compares the epidemiology and incidence of abuse in the world, particularly the USA and the EU.
Key words:Methamphetamine, “Meth mouth”, drug abuse, oral health. 相似文献
2.
3.
4.
5.
Oliver Sartor MD Daniel Heinrich MD Neil Mariados MD Maria José Méndez Vidal MD Daniel Keizman MD Camilla Thellenberg Karlsson MD Avivit Peer MD Giuseppe Procopio MD Stephen J. Frank MD Kalevi Pulkkanen MD Eli Rosenbaum MD Stefano Severi MD José Trigo MD Lucia Trandafir MD Volker Wagner MD Rui Li MS Luke T. Nordquist MD 《The Prostate》2019,79(14):1683-1691
6.
7.
Giada Lullini Eugenio Cammisa Stefania Setti Iacopo Sassoli Stefano Zaffagnini Giulio Maria Marcheggiani Muccioli 《World journal of orthopedics》2020,11(6):285-293
Although the rate of patients reporting satisfaction is generally high after joint replacement surgery, up to 23% after total hip replacement and 34% after total knee arthroplasty of treated subjects report discomfort or pain 1 year after surgery. Moreover, chronic or subacute inflammation is reported in some cases even a long time after surgery. Another open and debated issue in prosthetic surgery is implant survivorship, especially when related to good prosthesis bone ingrowth. Pulsed Electro Magnetic Fields(PEMFs) treatment, although initially recommended after total joint replacement to promote bone ingrowth and to reduce inflammation and pain, is not currently part of usual clinical practice. The purpose of this review was to analyze existing literature on PEMFs effects in joint replacement surgery and to report results of clinical studies and current indications. We selected all currently available prospective studies or RCT on the use of PEMFs in total joint replacement with the purpose of investigating effects of PEMFs on recovery, pain relief and patients' satisfaction following hip, knee or shoulder arthroplasty. All the studies analyzed reported no adverse effects, and good patient compliance to the treatment. The available literature shows that early control of joint inflammation process in the first days after surgery through the use of PEMFs should be considered an effective completion of the surgical procedure to improve the patient's functional recovery. 相似文献
8.
As a consequence of the time-varying magnetic field induced by eddy currents, frequency drifting occurs when the sampling window of localized spectroscopy continuously shifts. The frequency drifting and the concomitant phase variations can severely affect spectroscopy results when data are acquired with multiple echo times (TEs), such as in the measurement of glutamate (Glu) concentration using the TE-averaged method. Specifically, the averaged spectra are further broadened and distorted in the presence of residual eddy currents, and editing of the coupled spins of Glu C4 protons is affected, resulting in errors in the measured relative intensity ratio. Postacquisition correction using unsuppressed water as reference can effectively minimize this detrimental effect, as manifested by the significantly enhanced signal intensity. Also, it is demonstrated that the methyl signals of creatine (Cr) at 3.0 ppm and choline (Cho) at 3.2 ppm can be used as internal references in finding frequency and phase disparities between different TEs. 相似文献
9.
Michele D. Mignogna Stefano Fedele Lucio Lo Russo Lorenzo Lo Muzio 《Journal of oral pathology & medicine》2003,32(4):200-205
BACKGROUND: The recurrent chronic orofacial swelling caused by orofacial granulomatosis (OFG) can cause significant cosmetic and functional problems but can be prevented if the disease is diagnosed early and promptly treated. Although the enlargement of the lips is described to be the most common presenting complaint, the clinical onset of OFG may be characterized by minor associated mucosal and neurological manifestations, making early diagnosis very difficult or, sometimes, merely presumable. PATIENTS AND METHODS: We retrospectively analyzed the clinical manifestations of 19 patients with OFG, who were examined at our institution between 1998 and 2002, in order to determine their initial manifestations and presenting symptoms. RESULTS: A total of 10 patients showed classical recurrent enlargement of the lips (six lower; four upper) as presenting symptom. In the other nine patients, OFG onset was characterized by transient unilateral facial nerve palsy (two cases), intraoral manifestations (two cases), recurrent swelling of the periorbital area (two cases), of the chin (one case), of the zygomatic area (one case), and of the cheeks (one case). CONCLUSION: Our data underlined that OFG onset could be frequently characterized by widely variable, multiform, and temporary clinical findings. Involvement of atypical sites of the orofacial region and presence of single minor manifestations may occur as presenting symptoms, often preceding the development of traditional clinical findings. 相似文献
10.
Magdalena Cortes Alessandro Lambiase Marta Sacchetti Silvia Aronni Stefano Bonini 陈旭 《美国医学会眼科杂志(中文版)》2006,18(1):30-32
泪管-耳-牙-指(趾)(LADD)综合征是一种具有多种表现的常染色体显性遗传疾病。最初在1967年由Levy报道。1例双侧泪液系统缺失、杯状耳、干嘴,以及牙、手臂和指(趾)异常的单发病例。之后一些新发现的临床表现,如肾脏异常、唾液腺缺乏、先天性髋脱位、先天性裂孔疝和横膈疝、感觉性耳聋和传导性耳聋、牙发育不全、四肢异常、口腔干燥和眼干都被报道与此综合征有关。 相似文献